Yes, I searched. This question is for IX's only, as VIII's run higher timing.

So the questions I have is..

If I were using race gas and could increase ignition timing higher and higher with each pull.. even if i were getting 0 knock the whole time, when should I stop messing with timing?

What should be an absolute peak timing advance before I should think, maybe its time for an increase in boost instead, lean out AFR's .. etc.. (btw redline @ 7800 RPM)?

Information: No AWD dyno available, so I can't find MBT that way..

Thanks

 

Come on, anybody ?

 

Boost
Fuel
Spark

Timing stops with knock, then dial back a degree or 2.

Example---
30psi
11.9 AFR
15* (it knocked at 17 so back it down)

Timing falls where the engine is happy if you have your other variables where you want them.

This one of many ways to do it. I cant say that there is a wrong or right way, becuase if done based on knock you will always have the highest cylinder pressure for a given combo that you can and therefore the highest torque for a given rpm. Boost and octane are always the 2 variables to consider first. The next one is preference, unless you calculate the difference in specific gravity of the fuel and know for a fact that XXX octane requires YY.Y AFR, then timing.

 

I guess its time to up the boost then..

 

I would of started by pulling up the boost if your on race gas then add timing form there.