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Old Sep 14, 2009 | 11:16 PM
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Default proper afr

my friend is an idiot he thinks 11.8 to 1 is an ok afr for a cammed n/a ls1. I know this is better than being to lean but an afr this rich is robbing power. I understand for a nitrous/fi application this would work and perhaps be on the lean side. I have been tuning for a couple months and have read two books and have yet to hear of an n/a car that makes peak power that rich. i know every car is different but this is merely a pissing contest. please chime in with your vote. is he right or am i. by the way he swapped out his 305 after he missed a shift and spun a bearing. he had to put in a new and got it run so he thinks he's pretty handy. we now call him ase certified charlie
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Old Sep 14, 2009 | 11:29 PM
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I like to keep it 12.8-13.0 for NA, it maybe a little lean for some.
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Old Sep 14, 2009 | 11:32 PM
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12.8 here
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Old Sep 15, 2009 | 12:27 AM
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14:1 at idle, 12.7:1 at WOT here on NA. Any leaner and I lose a little power.

Last edited by Goldfinger911; Sep 15, 2009 at 12:39 AM.
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Old Sep 15, 2009 | 05:31 PM
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It really comes down to how accurate ur wideband is - A wideband that is off by .5 might need to be close to 12.5 As You could be running .5 rich, or lean at any given time. If he is working with something worse than .5 then maybe that is why he wants 11.8?
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Old Sep 15, 2009 | 06:55 PM
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12.5-13.0 N/A is a good rule
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Old Sep 15, 2009 | 06:59 PM
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I run 13.1 at the track and 12.5 on the street. 11.8 won't really hurt anything but you'll definately leave some power on the table.
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Old Sep 15, 2009 | 09:51 PM
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u guys missed the point he doesnt tune period and made a generalized statement on which he has no knowledge. i know 12.7 to 13.1 is used for max power in n/a apps. i am just tired of listening to him talk about **** with which has no real knowledge hence his nickname. i build all my cars myself but because he was ase certified for brakes he thinks knows everything and i just want to take him down a peg. he always has some criticism and iwanted to brake him a little
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Old Sep 15, 2009 | 10:00 PM
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Originally Posted by massconfusion
i know every car is different but this is merely a pissing contest. please chime in with your vote. is he right or am i.
Originally Posted by Bville99gt
I like to keep it 12.8-13.0 for NA
Originally Posted by artypyro
12.8 here
Originally Posted by Goldfinger911
12.7:1 at WOT here on NA. Any leaner and I lose a little power.
Originally Posted by JDMC5
12.5-13.0 N/A is a good rule
Originally Posted by NSSANE02
I run 13.1 at the track and 12.5 on the street. 11.8 won't really hurt anything but you'll definately leave some power on the table.
Originally Posted by massconfusion
u guys missed the point
...
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Old Sep 15, 2009 | 10:39 PM
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knock his *** out!!! lmao.. naw.. Everyone thinks they know something alittle better that someone else.. hell he might even put his pants on both legs at the same time.. but still, does that make it any better than how you do it?

Like you said AFR can vary alot, and without a Dyno, and your wideband it would be hard to support either side of what your saying, but if you want to put an end to this, just put it on the rollers, get some numbers on his idea of good, then plug in your tune, and see who really makes the power..

Wish I could help more than that.
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Old Sep 15, 2009 | 10:44 PM
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Originally Posted by 02_ramair_ta
without a Dyno, and your wideband it would be hard to support either side of what your saying
No, there's no argument that at least mid-high 12's will make more power than 11.8
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Old Sep 16, 2009 | 06:23 PM
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Originally Posted by 02_ramair_ta
knock his *** out!!! lmao.. naw.. Everyone thinks they know something alittle better that someone else.. hell he might even put his pants on both legs at the same time.. but still, does that make it any better than how you do it?

Like you said AFR can vary alot, and without a Dyno, and your wideband it would be hard to support either side of what your saying, but if you want to put an end to this, just put it on the rollers, get some numbers on his idea of good, then plug in your tune, and see who really makes the power..

Wish I could help more than that.
Originally Posted by NSSANE02
No, there's no argument that at least mid-high 12's will make more power than 11.8
nssane is right and so are you ram air everything is diiferent and i am sure their might be one combo out of a million that will preform better with 11.8 to 1 than a mid 12s afr but 999,999 out of a million mid 12s will out preform on a n/a car. this doesn't pretain to any particular car it was just an example because my car is a cammed n/a ls1. I will be dynoing it soon and will post after i knock my friends *** out and win our pissing contest. lol, thanks guys for just bullshiting with me. lets keep this going though i want all the cammed n/a to keep posting this is getting interesting and fun
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Old Sep 17, 2009 | 12:05 AM
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OLSD tune
12.8-12.9 n/a here
11.5-11.7 on spray
15.5 idling
14.7 cruising
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Old Sep 17, 2009 | 01:15 AM
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So as I reread your original post, you merely want us to vote who is right, you or him? If you want a vote, then put up a poll. You then receive far more meaningful data from members (some who actually DO tune) and you complain?
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Old Sep 17, 2009 | 07:47 PM
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actually genius if u really reread it i have said everything everyone else has said because i tune and have read books, currently working on the masport. everyone else had relevent posts other than you and could understand want i wanted even though i may have been unclear at first. your right i should have done a poll but i don't know how.just out of curiousity where was your relevent info that everyone else added reaffirming how i was right.
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Old Sep 17, 2009 | 08:28 PM
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Originally Posted by massconfusion
actually genius if u really reread it i have said everything everyone else has said because i tune and have read books, currently working on the masport. everyone else had relevent posts other than you and could understand want i wanted even though i may have been unclear at first. your right i should have done a poll but i don't know how.just out of curiousity where was your relevent info that everyone else added reaffirming how i was right.
You need to calm down man, this is a BS thread anyways there's no need to be a dick to someone who's trying to help.
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Old Sep 17, 2009 | 08:30 PM
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Oh yeah...

Originally Posted by massconfusion
just out of curiousity where was your relevent info that everyone else added reaffirming how i was right.
Originally Posted by Goldfinger911
14:1 at idle, 12.7:1 at WOT here on NA. Any leaner and I lose a little power.
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Old Sep 18, 2009 | 06:06 PM
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yeah i was a bit of a dick. sorry about that sounded better in my head. my apologies goldfinger and good looking out nssane.
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Old Oct 2, 2009 | 06:23 PM
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Originally Posted by massconfusion
yeah i was a bit of a dick. sorry about that sounded better in my head. my apologies goldfinger and good looking out nssane.
yeah, thanks guys, screw the others who helped.
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