just learning to tune...stock injs.

[87owner]

If I can hold O2 mv's in the low 800's . And as I creep up the boost I start to get knock. Does that mean it is now an octane issue. I have only been actually tuning this car for the past couple of days. When do I know when I am out of injector? What kind of psi do you guys run with stockers? Basically how do you know when its the octane or just the amount of fuel causing problems. I want to get it as close as I can then install a propane kit for use in the streets.

 

[salvageV6]

Usually it's 3rd gear knock like you say for octane limits.

Did you clean the stock injectors at all?

Might want to run the tank down to 4 gallons or so and dump a gallon of xylene in the tank and drive it a bit.