CAMARO6 - View Single Post - Stock dyno test and First mods for the ZL1 1LE

SFV1LE · 12-12-2019, 04:19 PM

Mustang dynos are always the lowest or one of the lowest reading, so that is probably the reason. What is the octane of fuel there? Maybe mix in 4 gallons of 100 unleaded and test again--this will eliminate fuel as an issue. Were boost and AFR normal?

Also, you said it was getting some knock and tuner said maybe because it's tuned rich--knock is the OPPOSITE thing you get when rich, knock results from lean AFR (vs. rich AFR), high boost, and/or too much timing. That's why GM tunes the cars rich, to avoid knock in these monster SC motors when customers get bad fuel or even choose 87 at the pump

I would question the tuner's knowledge if they actually said that, it's a basic tuning 101 thing

12-12-2019, 04:19 PM	#5
SFV1LE Drives: 2018 Hyper Blue ZL1 1LE Join Date: Dec 2018 Location: CA Posts: 1,365	Mustang dynos are always the lowest or one of the lowest reading, so that is probably the reason. What is the octane of fuel there? Maybe mix in 4 gallons of 100 unleaded and test again--this will eliminate fuel as an issue. Were boost and AFR normal? Also, you said it was getting some knock and tuner said maybe because it's tuned rich--knock is the OPPOSITE thing you get when rich, knock results from lean AFR (vs. rich AFR), high boost, and/or too much timing. That's why GM tunes the cars rich, to avoid knock in these monster SC motors when customers get bad fuel or even choose 87 at the pump I would question the tuner's knowledge if they actually said that, it's a basic tuning 101 thing Last edited by SFV1LE; 12-12-2019 at 05:43 PM.