A/f Ratio?

OK IM FINALLY GETTING MY WIDEBAND GAUGE!! SP WHAT ARE THE GOOD NUMBERS AND THE SCARY NUMBERS?? ITS ON MY 08' 4.8 112 RADIX.

RITE NOW IM AT STOCK 5-6PSI,IM GOING TO DO THE PULLEY SWAP FOR 7-8LBS.

AND YES IM ADDICTED TO BOOST:hyper2:

Boost guys could tell you more but I'd say 12:1 or leaner would scare me.....but I'm not very brave.

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Originally Posted by GasGuzzler

Boost guys could tell you more but I'd say 12:1 or leaner would scare me.....but I'm not very brave.

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you should be in the 10/11 range in full boost. 14-15 cruising.. thats what mines at

Mid to low 11's while in boost and 14-15 while cruising as Ducky said. Anything in the high 11's low 12's while in boost is getting on the edge. Make sure you watch your KR as well.

x < 11.5 under boost and 14.5-15.5 cruising.

im with the 10.8-11.5 guys at WOT

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Originally Posted by mean05

im with the 10.8-11.5 guys at WOT

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+1

I dont like seeing my N/A setup over 12.8-9

Good rule of thumb for a safe tune:

10.8-11.2 for forced induction
12.5-12.7 for N/A

More aggressive numbers:
11.5-11.7 for FI
12.8-13.2 for N/A

Someone posted some screenshots from the ZR-1 tune over on the EFILive forum, and it commands as rich as 10.4:1 when in boost. I believe the stock PE tables in our truck tunes command 10.8 or 10.9:1 on our N/A motors.

Here's the instruction to the A/F meter I use. At the bottom there's a chart for reference.

http://www.fuelairspark.com/Instructions/170450.pdf

Sounds like you got your answer, if it's richer than 11.2, that's ok until you get up here,
see you soon,
allen