NewZed Posted November 10, 2024 Share Posted November 10, 2024 Bumping zboi's thread so he can continue his contributions to the community. Let's see an update. 1 2 Quote Link to comment Share on other sites More sharing options...
zboi Posted March 19 Author Share Posted March 19 So I had moved and left my car behind, but now that I'm back I did some more testing. I was unsure how accurate the knock sensors were as I was seing knock retard even when the motor was not in boost. Turns out they are 100% accurate. I put in some 104 octane and gave the car a spin. 99% of knock retard was gone. It is now quite obvious why people blow these motors so easily. I was getting knock retard throughout the 7psi (absolute PSI so 7 away from being "in boost") band from around the 3.6K+ RPM when using just 93 octane. I was getting up to 13 degrees timing pulled at higher boost. With the high octane it was only pulling timing at 14PSI boost, with a resulting spark advance of 20degrees. It will spin tires in 1-4th gear easily. Quote Link to comment Share on other sites More sharing options...
jeffer949 Posted March 27 Share Posted March 27 Something is not right if your getting knock out of boost. Have you verified timing with a timing light and not just gone off what the computer says it is? or your running way lean. Quote Link to comment Share on other sites More sharing options...
zboi Posted March 30 Author Share Posted March 30 Everything is verified and accurate and I'm running slighty rich actually. I'm just putting this info out there to help others. So many people scratching their heads replacing head gaskets all the time, this is why. Meanwhile my engine is running 14PSI with stock head gasket, no deck work, no head studs, everything stock with no issues. Quote Link to comment Share on other sites More sharing options...
zboi Posted April 9 Author Share Posted April 9 To wrap this all up, it made 308hp 358lb/ft at 4510RPM 17PSI. Power was climbing the whole time, but it ran out of injector at 4500RPM so I limited all runs to this. More power than expected. Plenty of power for the street, but to be safe I will step up to bigger injectors. 2 Quote Link to comment Share on other sites More sharing options...
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