My stock ratio is 10.0:1 but i want to go to 9.0:1 or 8.8:1 for my turbo setup anyone have any suggestions on which is better or if i should just keep my stock ratio?

 

10:0 is perfect on a gsr cause the stroke isnt the same as an ls so you wanna make a little more tourque, i think 9:0 is too low in my opinion, if you sleeve it you can still run 30+ psi in any compression.

 

tony the tiger on here is runnin 11:5 on his gsr with no probs, its all in the tunning

 

Is this a daily driver on pump gas? If it is then 9:1 is the norm...

 

i would keep it under 10:1........but above 9:1......CP sells nice 9.7:1 pistons which would be perfect!

 

yup, thats what i have 9:7, the only reason everybody used to run 9:0 back in the day is because they were using fmu's and afc's thats why, now we got better ems's

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdmhonda &raquo;</TD></TR><TR><TD CLASS="quote">10:0 is perfect on a gsr cause the stroke isnt the same as an ls so you wanna make a little more tourque, i think 9:0 is too low in my opinion, if you sleeve it you can still run 30+ psi in any compression.</TD></TR></TABLE>

WHY do you think 9:1 is too low? Is it because you have real data and knowledge, or is it just going by some stuff you heard on Honda-Tech? I just went from 10.5:1 compression to 8.5:1 compression, and my car still drives perfectly fine even without a turbo on it, thank you kindly. Jeff proved that 10:1 to 9:1 was worth barely any power off boost, and even not a very substantial difference on boost.

Here's a nice dyno overlay. One motor is 10.4:1 compression, one motor is 9.0:1 compression. Turbo sizes are fairly similar. You tell me which one is which. I mean, if 9:1 compression is just too low, shouldn't you be able to see a huge difference off boost from the low compression?

 

You are absolutely right. Plus you can push out more power on pump gas!


Modified by Muckman at 10:39 PM 6/23/2005

 

i guess i got smoked on this one. lol

 

the GSR makes it's power by revving a lot higher and the VTEC head, not the compression contrary to popular belief.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdmhonda &raquo;</TD></TR><TR><TD CLASS="quote">i guess i got smoked on this one. lol</TD></TR></TABLE>
Hey dont feel bad. I used to be a firm believer in high compression and boost too. It can be done, like Tony the Tiger has shown us but low compression is so much easier and safer to make big power with.

 

The car will be my daily driver for now and pump gas as well. I asked becuase mt on friend said to keep my stock ratio but my other friend said if i dont lower it i will blow my motor apart so looks like 9.7:1 you guys were a great help im trying to run 10psi out my to4e with stock injectors and ecu i dont know if it can be done though either

 

Don't turbo your car with stock injectors. I would worry about fuel management before compression ratios anyways.

 

Last year I was on 10:1 and this year I'm on 9:1
I want to make same #'s on pump that people make on race gas.