LT1-LT4 Modifications 1993-97 Gen II Small Block V8

A/F issue

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Old Jan 15, 2007 | 07:41 AM
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Default A/F issue

i had my car dynoed this weekeknd and the air fuel was 11.3 pretty much all the wau through rpms. see sig for mods. is there anyone out there that has the cam that i do that i can look at there tune to compare the air fuel curve. or some one post the % a/f at wot. im trying to lean it out to get the rest of the power out of it. i do have a madz28 tune just if you guys were wondering if it was tuned.
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Old Jan 15, 2007 | 01:45 PM
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anyone???????

and if anyone has a tune that has good airfuel i could campare to
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Old Jan 15, 2007 | 03:06 PM
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A good A/F I think is 12.5 to 1


How are you leaning it out LT1-Edit or adj fuel pres. reg.
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Old Jan 15, 2007 | 03:07 PM
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tunercats
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Old Jan 15, 2007 | 03:09 PM
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Yea just start leaning it out in you PE tables(I think)

I tune with LT1-Edit but I think its the same.
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Old Jan 15, 2007 | 03:20 PM
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yeah thats what i was planing on doing but was hoping to get something to compare to
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Old Jan 15, 2007 | 03:33 PM
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Yea, its hard to compare your motor to mine or anyones for that matter.

Im getting a wideband this spring so I will be able to tune at the track. Seems like the only way to go if you tune yourself.
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Old Jan 15, 2007 | 03:35 PM
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yeah thats true, guess i will wait till i get it on the dyno in a few weeks and play with it there.
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Old Jan 15, 2007 | 03:36 PM
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does anyone that uses tunercat know what to tune for cruise. im lean there
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Old Jan 22, 2007 | 02:45 PM
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well i guess i am looking for part throttle adjusting, anyone?
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Old Jan 22, 2007 | 02:52 PM
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you can adjust A/F @ WOT in the % Change to Fuel/Air Ratio VS RPM @ WOT. Add to those values to richen mixture in lean areas @ WOT, take away from those values to lean out rpm ranges that are rich.
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Old Jan 22, 2007 | 03:22 PM
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ment not wot, part throttle, cruising
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Old Jan 22, 2007 | 03:42 PM
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Originally Posted by ssean92
ment not wot, part throttle, cruising
That needs to be done if the VE tables. When you say you are running lean, I take that to mean the computer is adding fuel? If you're scanning, note the MAP and RPM where its lean, and by how much, and adjust accordingly.
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Old Jan 22, 2007 | 04:07 PM
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Originally Posted by edcmat-l1
That needs to be done if the VE tables. When you say you are running lean, I take that to mean the computer is adding fuel? If you're scanning, note the MAP and RPM where its lean, and by how much, and adjust accordingly.
im using tunercats and dont remember seeing that table??????????
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Old Jan 22, 2007 | 06:35 PM
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You could always play with the MAF calibration tables if you wanted to play with part throttle and cruising A/F
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