Tune - A/F

[kukri]

I've spoke to several tuners and I've got from 12.0 to 12.8 air to fuel ratio for the road course they recommend of doing. What do most of you run?

[ponygt65]

IDK how road racing would be different when it comes to A/F, but I can tell you most cars are best at 12.5-13.1 pending timing, mods, etc. for N/A.

[NJSPDER]

On a road course it is a better idea to stay a touch on the rich side compared to a drag race motor. Road racing is more of a sustained load than a few second long drag race, so cyl head temp has to be taken into account. Once the head heat soaks, you will get nothing but knock.

I would aim the tune for the 12.3 - 12.5:1 range with some extra fueling on decel if you track the car a lot or participate in longer sessions.

-Tim

[ponygt65]

Originally Posted by NJSPDER

On a road course it is a better idea to stay a touch on the rich side compared to a drag race motor. Road racing is more of a sustained load than a few second long drag race, so cyl head temp has to be taken into account. Once the head heat soaks, you will get nothing but knock.

I would aim the tune for the 12.3 - 12.5:1 range with some extra fueling on decel if you track the car a lot or participate in longer sessions.

-Tim

Gotcha. Thanks for the info. I'm not into road racing, but I love me some more knowledge.

Definitely makes perfect sense.

[kukri]

Yeah that's probably the range I will stay in. Cool