5sgte compression ratio Options

[b1gr3d]

I cannot seem to find anything on the cr 5sgte conversiion if the 5s rods and pistons and a gen 2 3sgte head?? All I can find is that I need to get lower comp pistons

[Mstoochn]

what HG are u using? HKS offers a 8.5 and a 8.8

head doesn't depict comp ratio, its all down to the pistons really unless you use a different HG (8.5 or 8.8) 0.4mm thickness difference
3s head is jsut a wide angle version of the 5s head

so with what you are saying you'll stil have 10.5:1 unless u swap HG

if you want lower comp, my suggestion would be 5s rods, custom 5s 8.5:1 pistons, 8.5 comp HG that will put u at 8.5:1, great way to go to reduce knock at 20psi+

Je offers .040 overbore 8.5:1 pistons which will run you about 900$
if you stick with your 5s crank pauter wil make you up hybrid 3s/5s rods. I would advise against it though as you have a 95', the crank is NOT forged

This post has been edited by Mstoochn: Nov 21, 2009 - 7:39 PM

[b1gr3d]

Actually I am wanting high comp. What I am going for is na for a few years using a 3sgte head and if possible a stock 5s botom end. I know this is in forced induction but I figured I would get an answer faster.


Plan:
stock rebuilt 3sgte head
stock 5s bottom end
750 Suzuki gsxr itb's
header back exhaust
probably safc
no real hp goal ( 150 would be nice, more even better)


Evenually this will get a turbo setup but after I get some more funds in my pocket and another engine or vehicle for down time.....
Any critisisms will be appreciated bu just be gentle



Actually I am wanting high comp. What I am going for is na for a few years using a 3sgte head and if possible a stock 5s botom end. I know this is in forced induction but I figured I would get an answer faster.


Plan:
stock rebuilt 3sgte head
stock 5s bottom end
750 Suzuki gsxr itb's
header back exhaust
probably safc
no real hp goal ( 150 would be nice, more even better)


Evenually this will get a turbo setup but after I get some more funds in my pocket and another engine or vehicle for down time.....
Any critisisms will be appreciated bu just be gentle

[_Jim_]

Why not just buy a complete GEN3 motor set, leave it stock, swap it in, and run it until you can afford a built 5s bottom end? It will be cheaper, faster (300hp), and a bit more reliable.

Just a suggestion.

[b1gr3d]

I have the throttle bodies and the head. All I need is exhaust, cam gears, timing belt, hg and probably some other tid bits.

I don't have 2 grand sitting around to buy a complete setup nor the downtime to put it in and I will buy the parts for the boosted engine part at a time over probably 9months to a year.... And I want to try a na setup with itb's

[_Jim_]

I have the throttle bodies and the head. All I need is exhaust, cam gears, timing belt, hg and probably some other tid bits.

I don't have 2 grand sitting around to buy a complete setup nor the downtime to put it in and I will buy the parts for the boosted engine part at a time over probably 9months to a year.... And I want to try a na setup with itb's

Best of luck to you then.

Your build is going to cost you a lot of money, and the same downtime to swap in as a GEN3 swap, just with less power, just making sure you are aware of that. Should be an interesting build if nothing else. What are your plans for an ECU?

[b1gr3d]

Don't know about the ecu. This is all in the concept phase still. It was a thought because I have the 3sgte head and I have a 750 sitting in my garage so what if????

Don't know about the ecu. This is all in the concept phase still. It was a thought because I have the 3sgte head and I have a 750 sitting in my garage so what if????

[Mstoochn]

pm me if u want the logic behind 5s-ge info, but jim is right gen3 or even 3s-ge is cheaper.
come time to boost your going to wish you have a better engine if you want to break that 300ish WHP barrier
pre-boosted that itb wont do much for you, although u may see SMALL gains. its not worth it for the amount of work you'll go thru

This post has been edited by Mstoochn: Nov 23, 2009 - 2:27 AM

[b1gr3d]

Well screw it- this engine is staying how it is and I'm gonna build a hybrid.

500hp capable and 300 dd. Doing research on setups now

I'd rather do something once correctly than try to squeeze out 5 more hp with $500 ( example)
Mr2oc is open in another window right now

[playr158]

you're going to need a megasquirt ecu or better in order to run ITBs...
this setup is going to run you at least 2 grand...
seriously the wrong way to go about it just because you have GSXR ITBs
sell them on Clist or ebay and put it towards something more efficient

ITBs = HIGH rpm motor with good VE......a 5sfe(sge)(sgte) is none of this.

This post has been edited by playr158: Nov 23, 2009 - 1:15 PM

[Mstoochn]

Well screw it- this engine is staying how it is and I'm gonna build a hybrid.

500hp capable and 300 dd. Doing research on setups now

I'd rather do something once correctly than try to squeeze out 5 more hp with $500 ( example)
Mr2oc is open in another window right now

exactly what i did but i made my bottom end armor piercing round proof

cost me 9,000$, u could build it alot cheaper if u dont buy a 3000$ EMS and pay retail for your turbo set up
Gt3071r 344whp @ 13psi, 434whp @ 19psi. no sign of knock. No WI

other than mr2oc the mr2registry will also give u a few ppl running 400-800whp alot of there videos supply you with contact info

This post has been edited by Mstoochn: Nov 23, 2009 - 2:08 PM