Quote:
Originally Posted by KingLT1
Just note I have had to remove timing from X shop "safe" pump gas tune because the car was showing 2-3 degrees KR. For example, a P1x car with LT4 fuel system @ 8-9psi peak. It would only tolerate 11-12 degrees timing on a 90 degree day...previous shop was commanding 14-15. That isn't safe imo. I can probably go back and find the data logs for proof of need be.
The fact that the engine will only run that much timing without knock tells me there isn't enough octane being used.
I wouldn't run anymore than 6-7psi on 93 octane. What the dyno shows isn't the same as the street.
I have no monetary gain here, I am not trying to sell you parts or a package for profit. I am simply the guy who has debunked a lot of bullshit on his own free time with countless hours invested into testing my car on the "Street" where it matters most.
The LT1 doesn't even like pump gas NA. It's one of the few engines out there that gains 25-30whp on E85 alone with no other mods. That should tell you all you need to know.
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Yep, 11 is my go to on 93 octane pump gas.