My Power Enrich Fuel Multiplier vs. RPM table varies AFR from 13.5:1 to 12.1:1 over the rpm range from idle to 6000rpm with 12.1:1 commanded from 4800rpm-up....does this sound about right or should I be looking for a different commanded AFR ???

 

Probably don't need it quite that rich for N/A. 12.5-12.7 should be rich enough.

 

I would back it off to 12.6 and see hwo that is, if it seems a bit sluggish even backing it down to 12.8 is ok. Mine runs its richest at 12.8. PE is 13.2-12.8.

Chris

 

You'll make more power with a leaner mixture probably about 13.5 to 1.The trick is in the combination of optimized timing and a just rich enough fuel mixture to avoid detonation.The only reason to go with a richer mixture is to accomadate a power adder.

 

So what it the ideal AFR for a supercharged 6.0
Mark

 

I had my truck tuned today, new cam, springs, oil pump, and chain. Tuner said 12.0 was relatively safe for a boosted application.

 

depends greatly on your setup, but if your stock besides the radix...12 is supposedly safe. I like staying under 12 for longevity. I am in a hurry to get quick 1/4 times, but not in a hurry to burn a piston up.

 

OK....with 10.5:1 CR what kind of timing and AFR combo should I be looking for then ??

 

Target the same AFR.

Timing... there isn't just some number that can be thrown and that will apply. Your best bet is to get it on a dyno and steady state tune timing table. Will take you a few hours, but when you're done, your timing table will be near perfect.