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> CELICA TWINTURBO.....
post Oct 20, 2004 - 9:44 PM
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st_celica_killer

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um...is it possible to make a celica twin turbo..by useing the stock twin turbo off of a supra..........with custom made header...and a built block 7afe .....with port and polish head..and..blah blah blah.!!!.the rest is secret for me..hahah!!!! if not..possilbe..could it been done.the other way around..go get some junk yard turbo.I MEAN SOME SMALL TURBO to make enough rooms for it..and make twin on the celica..with custom header....cauz...anything with $$$$$$$$ is possible right.............that is what i heard???? bowdown.gif
post Oct 20, 2004 - 9:46 PM
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Digndoug



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its possible but not worth it, supras have twin because its a V6.. an it makes sence, also most performance supras convert from one - two supras... I wouldnt even say its worth it, or would even work nearly as well.
post Oct 20, 2004 - 9:49 PM
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playr158



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you need two intake manifolds

two seperate headers/exhuast (1 per 2 cylinders)

and alot more room
post Oct 20, 2004 - 9:53 PM
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the 7a would only have enough exhaust volume to propell the first turbo... it is a 1.8 liter... the TT supra is a 3.0. A single turbo is the only thing that would work on a celica and make it actually fast...haha... unless you put the whole 2jz engine in there... but lets not get into that again!
post Oct 20, 2004 - 9:53 PM
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so if you did, what kinda hp gain would you get? more than the GT4?


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post Oct 20, 2004 - 9:54 PM
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Doge



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also.. the TT supra turbo setup is sequential..meaning the first turbo is small and is used to spool up the second turbo.. so all 6 cylinders flow exhaust through one manifold that goes to one turbo.. then to the next.

Just to give you an idea the SMALL turbo on the TT is a ct26... which is the main turbo in a 3sgte... which has 200+HP... the BIG turbo on the TT would be heavier than the whole celica! biggrin.gif

This post has been edited by Doge: Oct 20, 2004 - 9:55 PM
post Oct 20, 2004 - 9:58 PM
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creis



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anything is posible, but not worth the money at all.

you dont need 2 intake manifolds, just 2 exhaust manifolds. the 2 turbos feed into one intake manifold on the supra tt, but a really big one

what motor are you talking about, the 5sfe could not handle that kinda force on it, for sure. the 3sgte might but only with mojor mods, so naturaly if done right it would have about 400 hp. maybe more. i dont know about the 7afe but i doubt it


This post has been edited by creis: Oct 20, 2004 - 10:01 PM


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post Oct 20, 2004 - 10:00 PM
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x_itchy_b_x



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QUOTE (creis @ Oct 20, 2004 - 10:58 PM)
anything is posible, but not worth the money at all.

you dont need 2 intake manifolds, just 2 exhaust manifolds. the 2 turbos feed into one intake manifold on the supra tt, but a really big one

well what if u had two very small turbo that spooled up VERY quick like 5psi each turbo isnt that 10psi once the pressure meets? then ud have amazing response..


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post Oct 20, 2004 - 10:02 PM
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you would have no top end... even though they respond super quick they will also max out super quick and begin to choke... it be crazy low end though! biggrin.gif
post Oct 20, 2004 - 10:04 PM
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st_celica_killer

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so would it be better off with 2 smaller turbo then the supra...i know i need to do a custom header..on it....its going on my celica.st 7afe..with a built block...well c what is the out come when its done...ill post up some pix ..later..
post Oct 20, 2004 - 10:07 PM
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creis



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i dont think that it would make 10 psi, i think there is a math equation for it, but i think that if there running 5 psi the overall preasure would be 5 psi, because for eash cub foot of air going in there is a cub foot of air going out evenly so it would just travel 5ps.

but that would be very nice, two quick spooling turbos would own.


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post Oct 21, 2004 - 1:08 AM
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QUOTE (Digndoug @ Oct 21, 2004 - 2:46 AM)
its possible but not worth it, supras have twin because its a V6.. an it makes sence, also most performance supras convert from one - two supras... I wouldnt even say its worth it, or would even work nearly as well.

Supra has an inline-6.
post Oct 21, 2004 - 1:38 AM
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QUOTE (Justin @ Oct 20, 2004 - 11:08 PM)
QUOTE (Digndoug @ Oct 21, 2004 - 2:46 AM)
its possible but not worth it, supras have twin because its a V6.. an it makes sence, also most performance supras convert from one - two supras... I wouldnt even say its worth it, or would even work nearly as well.

Supra has an inline-6.

thank you i was just about to post that. and the point for the tt setup is they are sequiential. which means one after the other. pointless on a i-4. but the thought crossed my mind. and please dont use the 7afe stock block with a tt setup, even if its built. at least go ge. then you wont crack anything to soon. btw if your thinking of road racing this beast dont it will only be good for 1/4 miles.

This post has been edited by shadycrew31: Oct 21, 2004 - 1:40 AM
post Oct 21, 2004 - 1:40 AM
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st_celica_killer

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so what is the answer is it going to work or not. ...i know its a twinturbo... one kick at low rpm around..2500rpm and the 2nd comes in around 3500 to 4000... so could it be done...with a 7afe built block and built head.could it stand up with the TWIN TURBO........will it the twinturbo work..?????..and does it takes time to spool the turbo since its a V4.......................not a v6.....its drill to have twinturbo celica.... : bowdown.gif

This post has been edited by st_celica_killer: Oct 21, 2004 - 1:41 AM
post Oct 21, 2004 - 1:44 AM
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st_celica_killer

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OR IS IT ..BETTER OFF WITH A CUSTOM TWIN TURBO..USEING SMALLER TURBO.AND 4age head......
post Oct 21, 2004 - 1:48 AM
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QUOTE (st_celica_killer @ Oct 20, 2004 - 11:44 PM)
OR IS IT ..BETTER OFF WITH A CUSTOM TWIN TURBO..USEING SMALLER TURBO.AND 4age head......

why are you always screaming? TURN OFF CAPS! Please.


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post Oct 21, 2004 - 1:49 AM
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QUOTE (st_celica_killer @ Oct 21, 2004 - 6:40 AM)
so what is the answer is it going to work or not. ...i know its a twinturbo... one kick at low rpm around..2500rpm and the 2nd comes in around 3500 to 4000... so could it be done...with a 7afe built block and built head.could it stand up with the TWIN TURBO........will it the twinturbo work..?????..and does it takes time to spool the turbo since its a V4.......................not a v6.....its drill to have twinturbo celica.... : bowdown.gif

I wish I would've chosen the v4 option when I got my celica.
post Oct 21, 2004 - 1:53 AM
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i hope that was a joke lol....
post Oct 21, 2004 - 5:48 AM
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QUOTE (st_celica_killer @ Oct 20, 2004 - 11:40 PM)
so what is the answer is it going to work or not. ...i know its a twinturbo... one kick at low rpm around..2500rpm and the 2nd comes in around 3500 to 4000... so could it be done...with a 7afe built block and built head.could it stand up with the TWIN TURBO........will it the twinturbo work..?????..and does it takes time to spool the turbo since its a V4.......................not a v6.....its drill to have twinturbo celica.... : bowdown.gif

Could you even imagine V4 engine? Do you know what are you talking about? Do you READ what you write?

QUOTE
I wish I would've chosen the v4 option when I got my celica.


No way... NO WAY.... 2 stupid answers in one stupid topic is wayyyy tooo much...


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post Oct 21, 2004 - 7:18 AM
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user posted image

Why would you want a V4? Do you have a motorcycle?

There arent enough exhaust gases to push 2 turbines, its a bad idea and you will make less power than a single turbine, kinda why alot of Supras opt for a single turbo.

This post has been edited by Supersprynt: Oct 21, 2004 - 7:18 AM


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post Oct 21, 2004 - 8:16 AM
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QUOTE (creis @ Oct 20, 2004 - 8:07 PM)
i dont think that it would make 10 psi, i think there is a math equation for it, but i think that if there running 5 psi the overall preasure would be 5 psi, because for eash cub foot of air going in there is a cub foot of air going out evenly so it would just travel 5ps.

but that would be very nice, two quick spooling turbos would own.

It would all depend on the compression ratios of the compressors in the different trubos. But if they are two same exact turbos set sequeintial and both set to compress up to 5psi, then you are right, the end result would only be 5 psi. In this case, the only thing that matters is the mass air flow through the turbos.

st_celcia_killer:

the short answer is NO. It will not work.

the longer shorter answer is yes, it can be done if you REALLY want to. All it takes is TONS of money. Probably more money than it would take to put an actual 2jz engine in your st (please dont try that either). Dont waste your money to build up and put a TT setup on a 7a, give it to charity instead.


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post Oct 21, 2004 - 8:40 AM
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turboinduction



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4 types of engine:

V-Formation (V)
Inline (I)
W-Formation (W)
Flat (H)

oh and

Rotory


Please know that not all engines are V's.

-Ti

This post has been edited by turboinduction: Oct 21, 2004 - 3:01 PM
post Oct 21, 2004 - 8:47 AM
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Mike



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QUOTE (Digndoug @ Oct 20, 2004 - 7:46 PM)
its possible but not worth it, supras have twin because its a V6.. an it makes sence, also most performance supras convert from one - two supras... I wouldnt even say its worth it, or would even work nearly as well.

Like someone else said, the Supra has a inline 6.
The twin turbos on the Supra aren't that effecient either, even though one is used to spool the other, you still get a nasty bottleneck affect because of one intake manifold and one exhaust manifold, most know the best setup for a Supra is a single turbo. Thats why so many people are doing conversions.


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post Oct 21, 2004 - 9:21 AM
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turboinduction



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QUOTE (Mike @ Oct 21, 2004 - 8:47 AM)
QUOTE (Digndoug @ Oct 20, 2004 - 7:46 PM)
its possible but not worth it, supras have twin because its a V6.. an it makes sence, also most performance supras convert from one - two supras... I wouldnt even say its worth it, or would even work nearly as well.

Like someone else said, the Supra has a inline 6.
The twin turbos on the Supra aren't that effecient either, even though one is used to spool the other, you still get a nasty bottleneck affect because of one intake manifold and one exhaust manifold, most know the best setup for a Supra is a single turbo. Thats why so many people are doing conversions.

After reading a little bit about the Twins, I found something out. The small turbo does NOT spool the big turbo. The exhaust manifold is restricted to flow only to the small turbo until 4000 or so rpms. After that, the small turbo is maxed and the manifold opens to the large turbo providing instant spool and higher boost levels. The first turbo doesn't have a function except spool quickly and provide low boost levels til 4000. Some people go ahead and do the TTC (true twin conversion) meaning they fool the EGCV actuator into pressure by doing some bypass work with the VSV. And then some people go ahead add do a single turbo setup in which the manifold is wide open and all 6 blasters can power the turbo into a fast spool. Now, after thats been said, lets go back to the Celica. The Celica is a INLINE-4. Has some decent torque at low rpms, but not alot of punch. As stated eariler in this topic, the 'small' turbo on the Supra TT is a CT26. If one were to single turbo there car, they'd use the CT26. The only way that a TT setup on the Celica would work would be to find a smaller turbo than the CT26 (and no, the T25 Mitsu wont work either - its too big). Good luck there as the CT26 and T25 are two of the smallest turbos from the manu's themselves. Then, after having the 'small' turbo, you'd need something thats uber-powerful but slow spool. Like a Frankenstein 20G thats good upto well past 30psi. After the setup was complete, you'd need a block that could handle the 30+psi. After that you'd still have a slow car? Why you ask? Simple. As stated when I begun, you have a INLINE-4. Meaning the exhaust pressure isn't enough to spool a big turbo. The largest turbo I think the 5SFE could spool is the t3/t4 hybrid. AND THATS STILL SMALL. So to answer your question, the answer is NO, you cant TT a Celica. However, feel more then welcome to T3 the 5S and have a killer block (shhh- i'm letting my secrets out wink.gif).

-Ti

[\Topic]

This post has been edited by turboinduction: Oct 21, 2004 - 9:23 AM
post Oct 21, 2004 - 11:47 AM
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does it really have to open to the big turbo, or is it always open at once there's enough flow then if just starts moving the compressor?


btw, wouldn't a Boxter/flat 4 be like an V4...just at 180degrees?


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post Oct 21, 2004 - 12:39 PM
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QUOTE (Digndoug @ Oct 21, 2004 - 2:46 AM)
its possible but not worth it, supras have twin because its a V6.. an it makes sence, also most performance supras convert from one - two supras... I wouldnt even say its worth it, or would even work nearly as well.

I think Supra is inline 6, is not V6. wink.gif
post Oct 21, 2004 - 12:50 PM
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This is almost the dumbest topic ever. It's significantly dumber than the Pirates Vs Ninja post, which was filled mostly with arghs and jokes about how pirates can only get booty from other male pirates.

Also, if I read one more post about the Supra being an inline 6, I'm gonna scream. No one gives a ****. You KNOW he meant 6 cylinder; he obviosly doesn't know or gives a flying rats ass about the difference between V formation and inline- SO WHY ARE THERE 9 POSTS ABOUT IT?

It's sad, that this is the post that finally gets me 5 boxes.

This post has been edited by shid: Oct 21, 2004 - 12:52 PM
post Oct 21, 2004 - 12:55 PM
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turboinduction



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congrats shid on the master of the 5th

Hey, you aware that the Supra is actually a Inline-6?

-Ti
post Oct 21, 2004 - 12:56 PM
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QUOTE (turboinduction @ Oct 21, 2004 - 5:55 PM)
congrats shid on the master of the 5th

Hey, you aware that the Supra is actually a Inline-6?

-Ti

Die
post Oct 21, 2004 - 2:35 PM
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turboinduction



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QUOTE (shid @ Oct 21, 2004 - 12:56 PM)
QUOTE (turboinduction @ Oct 21, 2004 - 5:55 PM)
congrats shid on the master of the 5th

Hey, you aware that the Supra is actually a Inline-6?

-Ti

Die

lol - I'm actually laughing out loud

Much Love

-Ti
post Oct 21, 2004 - 2:40 PM
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QUOTE (Justin @ Oct 21, 2004 - 2:08 AM)
QUOTE (Digndoug @ Oct 21, 2004 - 2:46 AM)
its possible but not worth it, supras have twin because its a V6.. an it makes sence, also most performance supras convert from one - two supras... I wouldnt even say its worth it, or would even work nearly as well.

Supra has an inline-6.

Why do we keep mentioning that the 2jzgte is an I6 and not a V when its been mentioned about :LDkdafj;sdlkfjaf days ago!
READ!


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post Oct 21, 2004 - 2:55 PM
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QUOTE (turboinduction @ Oct 21, 2004 - 1:40 PM)
4 types of engine:

V-Formation (V)
Inline (I)
W-Formation (W)
Flat (F)

oh and

Rotory


Please know that not all engines are V's.

-Ti

Dont forget subi's, its an h design right, or is that what your concidering the flat??
post Oct 21, 2004 - 2:59 PM
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turboinduction



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QUOTE (Supersprynt @ Oct 21, 2004 - 2:40 PM)
Why do we keep mentioning that the 2jzgte is an I6 and not a V when its been mentioned about :LDkdafj;sdlkfjaf days ago!
READ!

I said it to piss off Shid, but maybe :LDkdafj;sdlkfjaf is a long time to some people.

-Ti
post Oct 21, 2004 - 3:01 PM
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turboinduction



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QUOTE (Digndoug @ Oct 21, 2004 - 2:55 PM)
QUOTE (turboinduction @ Oct 21, 2004 - 1:40 PM)
4 types of engine:

V-Formation (V)
Inline (I)
W-Formation (W)
Flat (H)

oh and

Rotory


Please know that not all engines are V's.

-Ti

Dont forget subi's, its an h design right, or is that what your concidering the flat??

Yep, I wrote F after Flat because I was in the groove, Its H for Horizontally opposed.

-Ti
post Oct 21, 2004 - 3:36 PM
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QUOTE (shid @ Oct 21, 2004 - 5:50 PM)
This is almost the dumbest topic ever. It's significantly dumber than the Pirates Vs Ninja post, which was filled mostly with arghs and jokes about how pirates can only get booty from other male pirates.

Also, if I read one more post about the Supra being an inline 6, I'm gonna scream. No one gives a ****. You KNOW he meant 6 cylinder; he obviosly doesn't know or gives a flying rats ass about the difference between V formation and inline- SO WHY ARE THERE 9 POSTS ABOUT IT?

It's sad, that this is the post that finally gets me 5 boxes.

It's even more sad you'r actually counting down till you get another box


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post Oct 21, 2004 - 11:44 PM
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The Supra is an inline 6, not a V6.

*reads thread* Eh... nevermind smile.gif

Anyway, I'm hoping that this is going to turn out like my very first post here... I don't suppose anyone remembers that?


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post Oct 21, 2004 - 11:52 PM
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shid



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QUOTE (SlowCelica94 @ Oct 21, 2004 - 8:36 PM)
QUOTE (shid @ Oct 21, 2004 - 5:50 PM)
This is almost the dumbest topic ever. It's significantly dumber than the Pirates Vs Ninja post, which was filled mostly with arghs and jokes about how pirates can only get booty from other male pirates.

Also, if I read one more post about the Supra being an inline 6, I'm gonna scream. No one gives a ****. You KNOW he meant 6 cylinder; he obviosly doesn't know or gives a flying rats ass about the difference between V formation and inline- SO WHY ARE THERE 9 POSTS ABOUT IT?

It's sad, that this is the post that finally gets me 5 boxes.

It's even more sad you'r actually counting down till you get another box

See the little edit below my post Slow? That means I saw that, went back, and edited it. Come on man, you're slow sometimes, but not THAT slow, slow tongue.gif

Besides, I think you'd agree with me that this is the dumbest topic ever- and having 10 posts about the supra being an inline 6 helps it be that
post Oct 22, 2004 - 1:15 AM
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Can't we all just be friends?!

This post has been edited by Anub1s: Oct 22, 2004 - 1:17 AM
post Oct 22, 2004 - 5:21 AM
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creis



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I think we all know the supra is an inline 6 not a v6, if the 2jzgte motor was a v6 it would not be a popular motor.

anyway, back to a twin turbo. its posible but not practical, you could get more from a single turbo and a well build motor, then a twin setup could ever get you just because its to much for the motor to handle, and tuning would be a pain to say the least.


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post Oct 22, 2004 - 8:38 AM
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jayi12-15psi

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can we, from now on ignore people like this?

I'm not saying that we are too smart to share information, but, this guy could have done 3 minutes of research before coming on here and using caps.


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post Oct 22, 2004 - 8:53 AM
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turboinduction



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I LOVE CAPS!
post Oct 22, 2004 - 12:46 PM
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QUOTE (Consynx @ Oct 21, 2004 - 9:47 AM)
does it really have to open to the big turbo, or is it always open at once there's enough flow then if just starts moving the compressor?


btw, wouldn't a Boxter/flat 4 be like an V4...just at 180degrees?

im still waiting for someone to answer my Q tongue.gif

and Boxter/Flat/Horizontally Opposed should all be same
Boxter is to Subi when getting tech. is Horiz. Opp.
Flat...hmm, i just caused a brain tumor, come back, something isn't clicking
Boxters are also what Porche calls theirs, i think the dif names are like technical name differences from car junkied names, and then the Engineer name tongue.gif


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post Oct 22, 2004 - 1:00 PM
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a while back and i found a page about twin turbo kits for the 3sgte on MR2 turbo.... the kits i think was running about 2-3k or even more. The kits estimates hp about 320 stocks. The kits was installed in a MR2twin turbo mr2
post Oct 22, 2004 - 1:02 PM
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turboinduction



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QUOTE (Consynx @ Oct 22, 2004 - 12:46 PM)
QUOTE (Consynx @ Oct 21, 2004 - 9:47 AM)
does it really have to open to the big turbo, or is it always open at once there's enough flow then if just starts moving the compressor?


btw, wouldn't a Boxter/flat 4 be like an V4...just at 180degrees?

im still waiting for someone to answer my Q tongue.gif

and Boxter/Flat/Horizontally Opposed should all be same
Boxter is to Subi when getting tech. is Horiz. Opp.
Flat...hmm, i just caused a brain tumor, come back, something isn't clicking
Boxters are also what Porche calls theirs, i think the dif names are like technical name differences from car junkied names, and then the Engineer name tongue.gif

If I right, a Boxster is like a I4, just on its side.

Boxster is like flat or H engine.

-Ti
post Oct 22, 2004 - 4:35 PM
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Mike431635

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Small turbo on a stock 2JZ-GTE is a CT20 (not related to what everyone calls a CT20b), not a CT26. The MKIII Supras used one turbo and that was a CT26. Just makin sure to get that bit in there.
post Oct 23, 2004 - 3:17 PM
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Consynx



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if Boxsters are what subaru uses, def not inline four.
they sound sick compared to anything else, a shame their supposed to be hard to work on because they just sound so amazing.

either way, does the larger turbo in a twin turbo really need to "open" up, or does is it always running, just does spool till later


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post Oct 23, 2004 - 4:39 PM
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recneps

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boxster engine, flat engines are defintly not a inline 4

this is a boxster engine

user posted image

those little cylenders are the pistons and the square thing in the middle is the crankcase.


i believe a H engine is just like this only 4 cylenders

This post has been edited by recneps: Oct 23, 2004 - 4:39 PM


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post Oct 24, 2004 - 11:06 PM
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OOBE

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This guy posts the most stupid threads. I can't explain how he can operate a computer and manage to post in the forums. rolleyes.gif



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QUOTE (SinisterSinner @ Dec 19, 2009 - 10:52 AM) *
I dont want to even think of turbos, they blow up way too often...
post Oct 25, 2004 - 12:39 AM
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QUOTE (OOBE @ Oct 24, 2004 - 9:06 PM)
This guy posts the most stupid threads. I can't explain how he can operate a computer and manage to post in the forums. rolleyes.gif

thank you ! i was gonna type that. if you have a 6th gen and you think its a v4 you should not be on this website....
post Oct 25, 2004 - 12:58 AM
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Look what happens when you get a bunch of people trying to answer questions they themselves know little about... rolleyes.gif

First off... no... no matter how bad you want it... you cannot twin turbo a 7AFE or 5SFE. These engines are simply too small and don't push enough exhaust gases to spin 2 turbos. The only way it MIGHT work, if you're spinning two LITTLE ASS turbos, or if you're spinning one at a time, in turn, sequential, however, that's not a simple thing either. The sequential twin turbos are designed to preserve low-end torque with a small fast spooling turbo and then a high-end kicker. It'll be COMPLETELY pointless on a small engine because there is no point in spinning the later turbo just because typical small turbos used in these set-ups are more than efficient enough to boost a 7AFE or 5SFE and make good top-end. Supra twins won't work. It's not a matter of having two exhaust manifolds either... or being flat (horizontally opposed), V, W, or inline. It's a matter of physics...

Look at it this way... if people are afraid of boost lag from running a single big turbo... what the hell makes you think it's gonna make it better to run TWO turbos?


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post Oct 25, 2004 - 1:02 AM
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FallenHero



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QUOTE (Kwanza26 @ Oct 24, 2004 - 10:58 PM)
Look what happens when you get a bunch of people trying to answer questions they themselves know little about... rolleyes.gif

First off... no... no matter how bad you want it... you cannot twin turbo a 7AFE or 5SFE. These engines are simply too small and don't push enough exhaust gases to spin 2 turbos. The only way it MIGHT work, if you're spinning two LITTLE ASS turbos, or if you're spinning one at a time, in turn, sequential, however, that's not a simple thing either. The sequential twin turbos are designed to preserve low-end torque with a small fast spooling turbo and then a high-end kicker. It'll be COMPLETELY pointless on a small engine because there is no point in spinning the later turbo just because typical small turbos used in these set-ups are more than efficient enough to boost a 7AFE or 5SFE and make good top-end. Supra twins won't work. It's not a matter of having two exhaust manifolds either... or being flat (horizontally opposed), V, W, or inline. It's a matter of physics...

Look at it this way... if people are afraid of boost lag from running a single big turbo... what the hell makes you think it's gonna make it better to run TWO turbos?

owned.gif
post Oct 25, 2004 - 5:57 AM
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AAAAAAAAAAAAAAAAAAAAAAAAAAAA!

are you still argumenting on this? i thought this topic died already... biggrin.gif


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post Oct 25, 2004 - 5:58 AM
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QUOTE (turboinduction @ Oct 22, 2004 - 6:53 AM)
I LOVE CAPS!

yay, me TOOOOO!


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post Oct 25, 2004 - 9:30 AM
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ok...even though no1 tried to answer my question, i think Kwanza did smile.gif
there are twin-turbos out there that just work normal...like, ...well i dont want to get into it

then there's sequential which has some kind of valve to open the larger turbo after a certain RPM.
crazy shiat. if it weren't for the smaller one having to keep spinning(right?) i'd say that is the best set-up ever, make a 10K revver...4-7mid-turbo 7-10 INSANE Water Mover


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post Oct 25, 2004 - 11:41 AM
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shid



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For the love of god, let this topic die
post Oct 25, 2004 - 12:05 PM
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Consynx



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answer my Q...i dont even remember what this topic was about but i wanna know how TT's work, and the dif kinds tongue.gif


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post Oct 25, 2004 - 12:22 PM
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turboinduction



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QUOTE (Consynx @ Oct 25, 2004 - 12:05 PM)
answer my Q...i dont even remember what this topic was about but i wanna know how TT's work, and the dif kinds tongue.gif

Here read this on a turbo forum:

QUOTE
posted by Inygknok
actually, twins dont reduce turbo lag. also there are 2 types of twin turbos, REAL twin turbos, and SEQUENTIAL twin turbos.

the "real" twin turbos, aka full-time twin turbos, is that both turbos are spooled up at the same time. the advantage of this is that both turbos will be giving u power all the time. the disadvantage is that if u know that turbos work on exhaust gases, well, instead of having the pressure of all the exhaust gases powering just one turbo, u have to use half and half, so spool time aint that great.

sequential twin turbos work differently. mostly, its one small turbo and one bigger turbo working. the key difference is that the smaller turbo will be the one doing all the work at a certain RPM level, and then the bigger one kicks in. ill sure the MK4 Supra as an example. all the way up until 3,000RPM, the small turbo will be the only one giving the car power, and then once 3,000rpms has been reached, the big turbo will kick in cuz the exhaust gas pressure is strong enough to spool it up fast, so in other words, the small turbo spools up the bigger turbo. the disadvantage is that, well, u dont have both turbos working full time, so one of them is just dead weight when they are not operational.


this is where single turbo set ups come in. while a single turbo will have the initial turbo lag of a full-time twin turbo (though the smaller the turbo is, the less lag it will have, get a really small one and u will barely notice the lag). turbos are efficient as long as they can work correctly with the torque band of the car. this means, that it can keep giving nice boost all the way up to the peak torque of the car. remember, torque is turning force (by definition). a single turbo will always be operational, and if u have the money, u can even get a lightweight one to save even more on weight. one bigger decent turbo can outlast 2 smaller ones due to the rotational speeds of the turbine blades (the bigger they are, the less rpms they have to go about in order to create the same amount of power).

full-time twin turbo cars are just the answer to big single turbos, but they are of no advantage just cuz they pretty much require the same force to spool up as just one big turbo, but they have more weight on them so no big deal (double the equipment is needed to run double the crap). then as for sequentials, well, just read the dead weight part above. single turbos dont have any dead weight since they are always in use.
post Oct 25, 2004 - 12:24 PM
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shid



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No.

Ok, fine

TTs work any way your mind can imagine them- no I'm serious. There's a TT setup for almost any config. You can have the smaller turbo be the only one working at low RPMs, and then switch off to a seperate, larger turbo for the higher RPMs.

You can have the smaller turbo spool up the larger turbo.

You can have a supercharger that spins freely (does not suck out hp) when the larger turbo kicks in.

You can have two seperate manifolds; one always spinnign the smaller turbo (and always sucking up air) and one always spinning the larger turbo (which doesn't suck up air til higher rpms)


Use your imagination! AND LET THIS TOPIC DIEEE
post Oct 25, 2004 - 3:14 PM
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Consynx



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lol
ok, i'll let it die now...knowing that there CAN be a valve of some-sort to shut down one turbo while another takes over, rather than HAVING to have both run


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