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post #1 of 7 (permalink) Old 08-15-04, 04:11 AM Thread Starter
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a/f ratio

just wondering what you guy's rekon is the best a/f ratio for high load? have got low to mid load a/f at ~14.5, with closed loop holding at 14.75, at the moment at high load it is at 10.0:1, i beleive i can get some more pwr from bringing this ratio to a more stoich condition, but still want to be on the safe side.


std stroke, alloy heads, comp cam, tfs manifold, 75mm t/b, 70mm maf, 30lb inj, adj fuel press reg, twEECer

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post #2 of 7 (permalink) Old 08-15-04, 04:25 AM
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Re: a/f ratio

yeah i reckon! 10:1 is disgustingly rich! i would aim for anywhere between 12.8 to 13.2:1 for a N/A application...

i have noticed that my car is running very rich as well atm, and i cant seem to lean it out - in the utilities section i have been selecting 'lean entire curve 5% (or more)" and clicking "process" to try make it leaner...its not doing much.

i have also been setting the injector size larger too, in the hope the computer will reduce the pulsewidths, but no luck there either...is there anything else you can change to run it leaner at idle and cruise???

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post #3 of 7 (permalink) Old 08-15-04, 05:30 AM
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Re: a/f ratio

When I played around with fuel pressures I found 12.5-13 gave the best results on mine.
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post #4 of 7 (permalink) Old 08-16-04, 02:44 AM Thread Starter
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Re: a/f ratio

yeah i'm thinking around maybe mid 13's, but just want to get an ide from ppl, my light/cruising ratios are spot on, just wasn't sure about WOT/high load.

std stroke, alloy heads, comp cam, tfs manifold, 75mm t/b, 70mm maf, 30lb inj, adj fuel press reg, twEECer

http://www.fpvtickfordclubwa.com.au/phpBB2/index.php

http://www.tweecer.com

http://www.icenet.com.au/~pie
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post #5 of 7 (permalink) Old 08-16-04, 04:17 AM
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Re: a/f ratio

eb2flyz, with the mods you've done, do you have a rwkw figure?

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post #6 of 7 (permalink) Old 08-16-04, 04:41 PM
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Re: a/f ratio

have a look at his first post and check his sig

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post #7 of 7 (permalink) Old 08-17-04, 01:28 AM Thread Starter
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Re: a/f ratio

when i got the car back on the road i was only producing 245rwhp, but have gained a lot through playing with the twEECer. has a lot more go than when it was dyno'd. and still plenty there if i can get the a/f ratio @ wot sorted

std stroke, alloy heads, comp cam, tfs manifold, 75mm t/b, 70mm maf, 30lb inj, adj fuel press reg, twEECer

http://www.fpvtickfordclubwa.com.au/phpBB2/index.php

http://www.tweecer.com

http://www.icenet.com.au/~pie
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