3s head on 5s Options

[Punch]

only pic...

[Boss-Celica]

I think I am probably going to do this project but not till winter. Is anyone else going to do this so we can help each other? Might as well seeing how I don't know any other celica owners that did this.

[Punch]

I will do it soon so we can go hand and hand....

[Boss-Celica]

Excellent.

[DG_Performance]

i still got that rebuilt 3s head .... i will let it go for 315 shipped!
pm me if interested
dg

[Kwanza26]

ahhh i LOVE this stuff. EXCELLENT post, kwanza.
now, can you explain a little about what the diffrence is between a 5s based stroker (3s 2.2l) and a 3s based stroker is, ive seen a bunch of diffrent stuff posted on the mr2 boards (mostly chrisk's posts) about how he builds 2.1 and 2.2l strokers based on the customers goals ect..can you break some of that down for us?

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I would only be in a position to make a hypothesis... but my first assumption will be simply... these strokers are all based on forced induction. When forced induction is applied, greater displacement can make more potential power, since more torque is available early on (ala horsepower formula). However, when it comes to an n/a engine, the engine must spin faster in order to make power because it's not being force-fed. The 5S block is limited in how fast it allows induction, based on it's stroke ratio, rod length, and various other little things. Even if you have a head that is a very capable breather, if the bottom-end cannot "suck" in enough air fast enough, no additional power is gonna be made. People should understand... the head does not breathe on its own... in fact... it does very little breathing. Breathing is triggered by the piston travel...

As for a 3S strokers... well, to start... the 3S and 5S blocks have different main journal sizes. I know the JUN 3S stroker crank is basically be a new crank with new rods and pistons (specs are nearly identical to the 5S). The 5S stroker is simply using the 5S bottom-end with new pistons. I'll guess that the 2.1 stroker is using the 5S crank in the 3S block. Because the 3S block doesn't have the same deck height as the 5S, some displacement is lost, hence 2.1 liters. I'm not sure exactly what these guys do... but based on that information... that's my educated guess. I do believe in displacement... but all things considered, 2.0 to 2.2 is small-time and is not gonna show huge results as some may think. I personally feel the 2.0 has many great advantages and is excellent as is... but many may want to do the extra mile for the additional torque (mostly between 2500-4500 rpms)... but it's all give/take.

[Punch]

additional torque on that 3s head with the turbo will make the car have alot of top end gain...
At the same time the car will have low end torque & be fun to drive on the street.

[Boss-Celica]

If I put a 3s head on my 5s but I don't want to turbo it does it matter what the head is from a 3sgte or a 3sge?

[Kwanza26]

additional torque  on that 3s head with the turbo will make the car have alot of top end gain...
At the same time the car will have low end torque  & be fun to drive on the street.
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If I put a 3s head on my 5s but I don't want to turbo it does it matter what the head is from a 3sgte or a 3sge?
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God... it's pointless trying to explain sh!t sometimes... people don't ask questions anymore... merely want confirmation on their dumb pipe dreams...

[Punch]

hope thats not a hit at me Kwanza26 ...
I done thing to cars you would never dream of.....

[Kwanza26]

hope thats not a hit at me Kwanza26 ...
I done thing to cars you would never dream of.....
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sure doesn't show... You're more like the guy who knows a guy who did things I've never dreamed of... but really... what do you know about what I do? I could care less what you think you know or what you've supposedly done... especially when it's always hearsay. It doesn't matter to me... what matters is the knowlegde shown in posts... the kind of off-hand stuff that is *known* to you through "FIRST-HAND"experience... not because you've seen a car or have a friend who knows a friend. What I think doesn't really matter... so take that as you will.

It's a shot at everyone really... They ask questions... they get answers that don't quite support their fantasies... then they either ignore all... or get upset that no-one is *really* helping them. Sad... but why do you figure all of the tech people... the ones with real "FIRST_HAND" knowledge have been quite silent lately?

[Punch]

LOL say what you will people seen what I've done, thats all I need ...
Your not helping me at all!!!

[Boss-Celica]

LOL say what you will people seen  what I've done, thats all I need ...
Your not helping me at all!!!
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True that.

[DeW_H0e_GT]

maybe a how to + parts ????...jus a thought

[Punch]

thats not bad idea...

[Jdog1385]

LOL say what you will people seen what I've done, thats all I need ...
Your not helping me at all!!!

your not letting him help you. obviously you dont know him too well. i mean look at the time he took to write some of those replies. thats some serious knowledge right there that you just put down.

[Punch]

more power to him...

[BLADDER_MASTER]

Eh, I'm actually in agreement with Punch's project. Only because I hear the 5S block is stronger than the 3S block. Got this from MR2OC.com

[Punch]

thanks BLADDER_MASTER you should come by the shop som time is one block down from jamasco...

[Punch]

check out som of the we do...