2.3L stroker pistons, what compression?

[sandiballs287]

so i am planning do a 2.3l stroker kit for my 6 bolt swap with a .02 bore thats going into my 98 gsx. my goal is to reach 500-600 awhp. my question is what is the difference in the compression that the pistons produce? and with my goal what is the best option?

 

[needsy]

I assume you are talking about compression ratio. Compression ratio is a measure of volume when the piston is all the way down compared to when it is all the way up. Higher compression ratios are more efficient but run hotter, so what ratio you chose depends a lot on what setup you want to run. If you are going to run pump gas you should probably go with a lower ratio, but if you will run race gas, E85 or the like you can get away with a higher compression ratio.

 

[jrohner]

Yeah, it depends quite a bit on what fuel you're running. I'd definitely go with the 9.5:1 if running E85 or race gas.

 

[sandiballs287]

thanks for the response .
well ill probably be running pump gas with some octane booster and as for the turbo is going to be a gt35r.

 

[Hubbell91Tsi]

pump gas go with 8.5:1 and lots of boost.

 

[Black95awd]

10:1, run meth injection.

 

[JEFFREYCASTGSX]

Octane booster isn't really gonna do anything

 

[Andrew Conrady]

do agree either go pump or race, not additives etc. wouldnt' suggest using meth to rely on.....works for some but if something fails......you would wish you wouldn't have relyed on meth injection.

 

[Hubbell91Tsi]

8.5:1 on pump or 9.5:1 on e85... thats what i would do and it would so be pretty safe. Maybe even go 10:1 on e85.

 

[sandiballs287]

whats the difference between E85 and pump 93 octane. does anyone run 8.5:1 on E85?

 

[1g_TaLoN]

8.5:1 and lots of boost and timing on E85

 

[coreyj]

im come from the VW 1.8T and a whole lot of those guys are running 2L strokers with 10:1 on 93oct. best bet would be adding water meth once boost reaches above say 10psi

hell vw's stock compression is 9.0-9.25:1

 

[1g_TaLoN]

im come from the VW 1.8T and a whole lot of those guys are running 2L strokers with 10:1 on 93oct. best bet would be adding water meth once boost reaches above say 10psi

hell vw's stock compression is 9.0-9.25:1

I put 30psi to my 2.3 with 8.5:1 on E85. Do that with a VW and have someone follow you to pick up the pistons and rods off the ground.
They are to diffrent animals.

 

[Long Duk Dong]

The compression ratio for pump gas would be directly related to the amount of cam duration, timing and boost you would like to run on a given octane. The higher the compression the more octane you would need to run for a given amount of boost. Meaning if you want to run around on say 15lbs on a 16g with stock or small duration camshafts then you are going to generate allot of heat and cylinder pressure in the lower RPM range and there-by need more octane. Most forced induction motors with smaller duration camshafts like around 8.5:1 compression on 93 octane with a moderate amount of timing.

 

[sandiballs287]

thanks for the info. im planning to run 272's. with either gt35r or fpRED

 

[420a-t]

I have a Holset H1E (similar to the 35r) and BC 280's and I decided to go with an inbetween CR because I wanted to be able to run pump if I needed to (closest E85 station is 2 hours away), but also be able to have good response with off-boost and daily driving.

I went with 9:1 comp. so I could have the best of both worlds. It seems to me that I made the right choice, but I probably use my car differently than you use yours. Just another thought.