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Lower compression ratio in a GTS #181057 May 19, 9:07am May 19, 9:07am
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Lower compression ratio in a GTS
Has any one tried this and can recommend the easiest way to do it? I plan on looking into the SF Turbo kit in the future and from what I have been reading it seems the only way to maximize the Turbo's potential, at least torque wise, in a GTS is to lower the compression ratio in the engine. Can anyone recommend the easiest and cheapest way to do this? Would this effect the overall WHP significantly? I would like to maximize torque without sacrificing to much HP.

Re: Lower compression ratio in a GTS [Re: daman1799] #181058 May 19, 10:45am May 19, 10:45am
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if you lower your compression, you will lose some hp, but you gain it back with a Turbo because you can now boost higher safely, but i would also recommend doing the rods while you are at it if you plan on running high boost. You can also get a bore kit that will not take as much away from the hp but is also costly to do.


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Re: Lower compression ratio in a GTS [Re: trdcelica13] #181059 May 19, 11:46am May 19, 11:46am
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Yeah I figured it might have to sacrifice some HP but that's ok as long as the Turbo produces. I would like to avoid a bore kit if at all possible especially if there is a cheaper and easier way to do it. I believe I read somewhere on one of these post about a lower compression kit? I'm assuming this is referring to a piston and rod kit that could do the trick. If this is true, where could I find one for a 00 GTS? Also, is there anything else I might need to strengthen (i.e. tranny, suspension, etc.) for the Turbo?

Re: Lower compression ratio in a GTS [Re: daman1799] #181060 May 19, 2:03pm May 19, 2:03pm
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Originally Posted by daman1799
Yeah I figured it might have to sacrifice some HP but that's ok as long as the Turbo produces. I would like to avoid a bore kit if at all possible especially if there is a cheaper and easier way to do it. I believe I read somewhere on one of these post about a lower compression kit? I'm assuming this is referring to a piston and rod kit that could do the trick. If this is true, where could I find one for a 00 GTS? Also, is there anything else I might need to strengthen (i.e. tranny, suspension, etc.) for the Turbo?


unless you plan on making over 275whp, you dont need lower compression pistions.

if you plan on going over 275 whp, you will need more than lower compression.

stronger transaxle, new sleves, apr head bolts, new connecting rods, standalone fuel management (not piggy back)

ect


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Re: Lower compression ratio in a GTS [Re: Illusive] #181061 May 19, 2:24pm May 19, 2:24pm
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Originally Posted by Illusive
Originally Posted by daman1799
Yeah I figured it might have to sacrifice some HP but that's ok as long as the Turbo produces. I would like to avoid a bore kit if at all possible especially if there is a cheaper and easier way to do it. I believe I read somewhere on one of these post about a lower compression kit? I'm assuming this is referring to a piston and rod kit that could do the trick. If this is true, where could I find one for a 00 GTS? Also, is there anything else I might need to strengthen (i.e. tranny, suspension, etc.) for the Turbo?


unless you plan on making over 275whp, you dont need lower compression pistions.

if you plan on going over 275 whp, you will need more than lower compression.

stronger transaxle, new sleves, apr head bolts, new connecting rods, standalone fuel management (not piggy back)

ect


good info illusive and dont think the tranny handles that power too well either


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Re: Lower compression ratio in a GTS [Re: Spencer] #181062 May 19, 4:14pm May 19, 4:14pm

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that weird how lowering it helps a Turbo work to its potential thumbsup

Re: Lower compression ratio in a GTS #181063 May 19, 4:49pm May 19, 4:49pm
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its your tranny thats gonna be the problem

Re: Lower compression ratio in a GTS [Re: spaztikid] #181064 May 19, 6:38pm May 19, 6:38pm
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Yeah but a Performance clutch and flywheel should help the tranny, right?

Re: Lower compression ratio in a GTS #181065 May 21, 10:14pm May 21, 10:14pm
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Originally Posted by XplodCelica0708
that weird how lowering it helps a Turbo work to its potential thumbsup
Not really, because the lower the compression ratio, the more air that can be crammed into the cylinders.


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Re: Lower compression ratio in a GTS [Re: daman1799] #181066 May 22, 5:44am May 22, 5:44am
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Originally Posted by daman1799
Yeah but a Performance clutch and flywheel should help the tranny, right?


that will help with using the power but your tranny will still dynamite (if its stock) you need cryo treated gears and such


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