Hey everyone! I'm running into a strange issue with the 91 Octane fuel available at places like Kwik Trip / BP etc.
If it's 91 with no ethanol in it, multiple tuners I've worked with have had to actually pull timing out (like set the base timing to - 4.00) when dealing with like 17 psi from an s280 turbo to avoid the aggressive knock going on.
If I then add some corn juice all the knock goes away and the car is happy as a clam.
Have you guys seen anything like this or is there something actually wrong with my car is particular, thanks!
If it's 91 with no ethanol in it, multiple tuners I've worked with have had to actually pull timing out (like set the base timing to - 4.00) when dealing with like 17 psi from an s280 turbo to avoid the aggressive knock going on.
If I then add some corn juice all the knock goes away and the car is happy as a clam.
Have you guys seen anything like this or is there something actually wrong with my car is particular, thanks!