Getting ready to go to the dyno to test some tunes and mods. I want to be real safe on the A/F range. What is a safe A/F range for our tracks??? where is it pig rich and where is it dangerous lean..... thanks in advance.

Doug

 

You've opened a bit of a can of worms here, as everyone has a different opinion. Depends on boost you're running.

I would recommend nothing higher than a A/F of 12.2 in the upper rpm ranges at WOT. And even with that, I would run only Sunoco 94 octane.

To be safe, depending on gas available in your area, 11.8 is probably a safer limit. Below 11 and you are running pretty rich.

 

It all depends on how much boost and timing you are running. Safe ranges can vary from 11:1 to 12.5:1

 

Well I have 92 octane and will have a 5lb lower.. not sure of the timming just told JLP to keep it safe for me.

Doug.... did not realise there was such a range.... Doug

 

When you guys write 12.2 does that also mean 12.2:1?

 

precisely

 

I run about 11.2 on my street program and 12.5 on my race program with sunoco 110