Detonation Threshold

[jake8790]

I know it's different in every engine, but I'm wondering how close I'm getting to the limits of 92 octane pump fuel in my 7M. I'm using a 57 trim ct26 at 16-17 psi with supporting mods. A/F ratio stays in the mid 10's at full throttle. I don't plan on pushing it any higher but I want to know if it's safe.

 

[IJ.]

Bigger danger is "Incipient Detonation" as you can't actually hear it but it's there in the background doing damage...

A set of electric ears is an eye/ear opener with a 7M!

 

[jake8790]

What boost levels do you start running into incipient detonation?

 

[IJ.]

All depends on the total combination but can be quite low if things aren't "right".. This is why I never pushed the envelope with my 7M, in theory it was a 1000rwhp build but it never went over 550 so was 100% reliable at the end!