Hey guys what the hightest compression ratio you can have on 92 octane pump gas? Going in LS/Vtec w/ B16 head...

 

I wouldnt push past 13:1, for a daily driveer i would say around 12-12.5

 

anybody else have any inquiries?

 

ive got 12.4 on my b20vtec still and im running on 93octane nothing seems to be happenning... I drive it almost everyday..

 

depends on tuning. i would say 11.0-11.5 for everyday driving. more than that and you are starting to push the driveability factor.

 

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Static compression ratio and octane rating are not really related. You need to build the engine around what you plan to do with it. An engine with a higher static compression ratio will require more duration on the cam to keep cylinder pressures low enough so the air/fuel mixture does not auto-ignite (detonate).

For a daily driver you probably don't want to go past 12.5:1, like the previous poster said. That being said though, the RPM the engine makes max power will be lower than an engine with, say, 13.0:1 If you want a higher reving engine you will need to go higher on the compression ratio.

I wrote a short paper on cams vs. compression ratio stored in my notepad if you want me to PM it to you later.