air/fuel numbers on boost - Boost Forum

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air/fuel numbers on boost
Tuesday, May 10, 2005 4:03 AM
i was just wondering today what are the number i would want to see on my wideband with my turbo. (this is tuned)


You are what you Drive!

Re: air/fuel numbers on boost
Tuesday, May 10, 2005 6:16 AM
with a turbo 13.0 - 12.5



1989 Turbo Trans Am #82, 2007 Cobalt SS G85





Re: air/fuel numbers on boost
Tuesday, May 10, 2005 9:07 AM
That's a bit high I think. I'd keep it 11.8-12.5.



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J-Body of Michigan -
Re: air/fuel numbers on boost
Tuesday, May 10, 2005 3:14 PM
I'm running in the 11's with mine. I would be scared if it was high 12's or 13's.







Re: air/fuel numbers on boost
Tuesday, May 10, 2005 4:07 PM
Is this at wot or crusing?
Re: air/fuel numbers on boost
Tuesday, May 10, 2005 4:10 PM
FstCavZ24 (Turbo ECO) wrote:I'm running in the 11's with mine. I would be scared if it was high 12's or 13's.

Under boost.


Cruising it's around 14.4-15.5







Re: air/fuel numbers on boost
Tuesday, May 10, 2005 4:15 PM
FstCavZ24 (Turbo ECO) wrote:I'm running in the 11's with mine. I would be scared if it was high 12's or 13's.


really? is high 12's or 13's bad?

its still richer then stock..

can you explain?

cheers


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Re: air/fuel numbers on boost
Tuesday, May 10, 2005 5:20 PM
With the amount of added heat, you really want to have a richer fuel mixture to avoid pre-detonation, cause the air-fuel mixture ignites much easier when things get hotter. Mid-high 13s is likely to blow your engine sky high.

There are a few things you can do to help avoid it, but you want a much richer mixture than stoich.



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J-Body of Michigan -
Re: air/fuel numbers on boost
Tuesday, May 10, 2005 5:47 PM
Raptor (TRB0SDN) wrote:With the amount of added heat, you really want to have a richer fuel mixture to avoid pre-detonation, cause the air-fuel mixture ignites much easier when things get hotter. Mid-high 13s is likely to blow your engine sky high.


I got my turbo on about two weeks ago with a wideband, when i was first starting to tune it, i hit high 13's with 5 pounds a bunch of times, engine didn't even knock. but i do not recommend doing it, i had to in order to get a base line. i am running ~12.5 under boost, i don't think you need it any richer than that, i do have it retarding bout 5 degrees though.



Re: air/fuel numbers on boost
Thursday, May 19, 2005 3:41 AM
ok now im alil confused. ill be tuning saturday..so cruse should be safe around wat then at WOT i should be around?


speed kills, drive slow, drive a honda

You are what you Drive!
Re: air/fuel numbers on boost
Thursday, May 19, 2005 3:01 PM
cruiseing your ECU should keep you at 14.7 - 15.0. WOT you should be aroun 13's once your around -3 vacuum to whatever boost PSI your running you should not go any leaner then 12.5 intercooled....id say no leaner then 12.0 not intercooled.

Corky bells Maximum boost says around 12-13 in between..so to each there own.

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