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A/f question????

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Old May 28, 2008 | 02:44 PM
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Cool A/f question????
I'm spraying a 150 shot on my car. I have a wideband a/f guage and i wanted to know what should my a/f ratio be at wot??? 14.1-14.7??????
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Old May 28, 2008 | 02:57 PM
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Just a little richer than your WOT motor tune.

Check some plugs also to be sure your good.
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Old May 28, 2008 | 04:40 PM
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Originally Posted by Ls1Gummi
I'm spraying a 150 shot on my car. I have a wideband a/f guage and i wanted to know what should my a/f ratio be at wot??? 14.1-14.7??????
14.x won't make many passes down the strip. Not knowing anything else about the car I would say 11.5 +/- a little either way. What's your base HP w/out the spray and what does it run best at NA? Pulling any timing on the 150 shot?
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Old May 28, 2008 | 05:27 PM
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NA I am around 12.5 - 12.7

NO2 should be a little more like 12.7 - 12.9
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Old May 28, 2008 | 07:00 PM
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Oh ok. On motor i'm probably 420-430, and yes i will be pulling timing. Best time was a 12.3 with a 1.70 60 foot
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Old May 28, 2008 | 07:50 PM
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Originally Posted by DopdBrd
NA I am around 12.5 - 12.7

NO2 should be a little more like 12.7 - 12.9
I hope you're not talking about Air Fuel ratio.....
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Old May 28, 2008 | 07:54 PM
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Originally Posted by jetlag
I hope you're not talking about Air Fuel ratio.....
Oh no, was I told wrong? That is what a few people have told me is a good place to be.

I know I run around 12.5 - 12.7 NA because of my wideband.
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Old May 28, 2008 | 08:08 PM
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Originally Posted by DopdBrd
Oh no, was I told wrong? That is what a few people have told me is a good place to be.

I know I run around 12.5 - 12.7 NA because of my wideband.
Better check your sources I didn't want to argue the point but darned if I would spray any stock bottom end LSx at AFR of 12.anything. Even if you get by with it (for a while) you're probably loosing HP because you're not giving it enough fuel.

Do a quick search on nitrous & AFR, I know there's been some good discussions on this before.
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Old May 28, 2008 | 08:11 PM
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IMHO run 12.7-13.0 on motor NA, and run between 11.5-11.7 on n2o up to 150, abit richer on the 200. This is also based on a GOOD tuner. I can run 13.0 on motor all day long and not detonate(knock) but I have alot of time in my tune, and the timing is damned near perfect.
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Old May 28, 2008 | 10:15 PM
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11.5-11.7 to be safe...you can lean it out more for some more power, but i wouldnt do it
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Old May 28, 2008 | 10:44 PM
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I run 11.7
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Old May 31, 2008 | 01:27 PM
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Anybody else????
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Old May 31, 2008 | 02:44 PM
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Originally Posted by crewchef
Better check your sources I didn't want to argue the point but darned if I would spray any stock bottom end LSx at AFR of 12.anything. Even if you get by with it (for a while) you're probably loosing HP because you're not giving it enough fuel.

Do a quick search on nitrous & AFR, I know there's been some good discussions on this before.
I'll do that man. I haven't sprayed the car yet, but like I said I know I run around 12.5-12.7 NA.
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Old May 31, 2008 | 02:49 PM
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On a smaller shot, say 100, you can go a bit leaner right?
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Old May 31, 2008 | 03:58 PM
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Rich is not safe when it comes to nitrous.

That is a lesson ALOT of people have to learn on there own so good luck.
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Old Jun 2, 2008 | 06:06 PM
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Originally Posted by ATVracr
Rich is not safe when it comes to nitrous.

That is a lesson ALOT of people have to learn on there own so good luck.
on a wet shot right?
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Old Jun 3, 2008 | 06:31 AM
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Originally Posted by caliswangin916
on a wet shot right?
Either one.

You still need the same amount of N20 and fuel wether its dry or wet.
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Old Jun 3, 2008 | 02:44 PM
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mine is about at 11.6 right now and thats right where i wanna be. im just running a 75 shot that is dry so i could be wrong but you want your afr to be between 11.5 and11.8 in that range is good.
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Old Jun 3, 2008 | 04:56 PM
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Originally Posted by ATVracr
Rich is not safe when it comes to nitrous.

That is a lesson ALOT of people have to learn on there own so good luck.

Why is that. I thought the added fuel would keep the cylinders cooler,thus preventing detonation..

I'm running 11.0 AFR on a 150
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Old Jun 3, 2008 | 06:30 PM
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Originally Posted by BOTTLEFEDLS1Z
Why is that. I thought the added fuel would keep the cylinders cooler,thus preventing detonation..

I'm running 11.0 AFR on a 150
Fuel gets in the ring lands and when it fires off it will lift it, from there it will loose compression and alot of bad stuff from there on out.

dont ask me how I know.

What A/F does the car like on the motor?
12.0 would be alot closer and safer IMO but some people will tell you I dont know ****.
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