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Tuning AFR's for N/A.

Old 05-31-2005, 07:35 AM
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Default Tuning AFR's for N/A.

i just had my p28 chipped and i also just installed my lm-1 in preperation for boost. while my spare block is at the machine shop getting ready for my pistons and rods, i want to start playing/tuning with uber. what air/fuel ratio's are good for WOT on a z6? ive got a fully built head on it and my AFR's are in the mid 11's and i just think that is way to rich N/A. what do you guys think it should be at?
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Old 05-31-2005, 08:10 AM
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Default Re: Tuning AFR's for N/A.

I'd take a stab and say 13:1 or maybe higher? 11:1 is definitly way too rich for NA
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Old 05-31-2005, 09:21 AM
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Default Re: Tuning AFR's for N/A.

yea thats what i was thinking...maybe 13:1 to 13.5:1 would be good...

what does everyone think on the timing as well? should i just advance it a couple degrees and call it good? im just looking to get some experience with uber and to get this whole tunning thing under control before i boost it! thanks!
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Old 05-31-2005, 10:01 AM
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Default Re: Tuning AFR's for N/A.

i belive 13.5 is where you want to be n/a
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Old 05-31-2005, 11:38 AM
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Default Re: Tuning AFR's for N/A.

13.5:1 is a good target for NA... however, you'll see if you ever run your car on the dyno, that lean doesn't always mean "more power".

..but as far as a street tune goes, it's a good target.
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Old 05-31-2005, 02:15 PM
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Default Re: Tuning AFR's for N/A.

yea like i said this is really just to get a feel for tuning while my block is being built. but i would like to get the most out of it (as much as i can on a street tune) right now with the built head it is just a dog! i hit WOT and my afr's are like mid 11's and ive even seen em drop into the 10's on the logs. although it seems faster than stock! anyways thats what im shooting for is mid 13's just to see if i can actually make productive changes and make a car run the way i want it to!!!
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Old 05-31-2005, 02:54 PM
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Default Re: Tuning AFR's for N/A.

I'm curious to know, when you go WOT are you looking for 13's across the board or just closer to 0Hg?
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Old 05-31-2005, 05:15 PM
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Default Re: Tuning AFR's for N/A.

i would think from vtec on up ud want it in that area
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Old 05-31-2005, 06:42 PM
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Default Re: Tuning AFR's for N/A.

When you're tuning NA on the street, shoto for a target across the board.

When you get on the dyno, you'll see where your ignition is dominating the horsepower and causing "Dips" in your horsepower curve. You can A) compensate with fuel, or B) remove ignition..

..both tend to smooth out the horsepower curve. But you won't see that on the street.
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