So if an MAF makes you run leaner...
Thread Starter
TECH Addict
Joined: Mar 2002
Posts: 2,189
Likes: 0
From: Glendale, CA
So if an MAF makes you run leaner... So if an aftermarket MAF makes you run leaner and long tubes make you run richer, wouldn't the two sort of cancel each other out for the msot part when it comes to air/fuel ratio?
Sorry if I am horribly mistaken!
Sorry if I am horribly mistaken!
TECH Senior Member
Joined: Nov 2001
Posts: 9,246
Likes: 3
From: Troy, AL
Re: So if an MAF makes you run leaner... My GMS MAF sensor did not make my car run leaner (and it wasn't designed to do so.) My QTP headers didn't make it run leaner either.
Just food for thought.
Just food for thought.
TECH Fanatic
Joined: Jun 2003
Posts: 1,070
Likes: 0
From: Further South than Hell
Re: So if an MAF makes you run leaner... With my mods and last dyno run I landed on 13.8/1 A/F, which I was told was good.
I'm guetting NOS 125 shot soon. By talking the HPP3 power tune off for N20 spray, what should be my A/F??
I'm guetting NOS 125 shot soon. By talking the HPP3 power tune off for N20 spray, what should be my A/F??
TECH Senior Member
Joined: Nov 2001
Posts: 9,246
Likes: 3
From: Troy, AL
Re: So if an MAF makes you run leaner... Sharky, I don't know the answer to your question, but I suggest that you do before you go spraying that thing. 13.8:1 is lean even for NA (I'd want no leaner than 13.3:1) but that spells disaster for running nitrous. 
Trending Topics
Re: So if an MAF makes you run leaner... um..... I'm pretty sure 13.8:1 is rich...14.7:1 is stoehic.....anything 15.0:1 and higher is leaner........13.8 really isnt lean...but ideal for our ls1's and ls6's is about 13.1:1-13.8:1....but if you spray..go way rich cause the spray leans you out....
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Re: So if an MAF makes you run leaner... you n/a guys are looking for 12.9 ish for best power and 14.7 is best for efficiency (part throttle cruising etc.)
a screwed up maf will not send the correct signal to the computer to indicate the correct airflow.. if you put an uncalibrated maf on the car like an ls6 maf or a truck maf or any aftermarket maf or any ported/descreened stock maf theres no telling exactly what you will get going to the computer unless you can calibrate for it in the computer (edit)
the ones going lean are from the stock electronics being used (and not recalibrated) in a larger housing.. larger housing allows more air past the resistors than it is calibrated for.. more unmeasured air in the engine means less fuel gets injected... which means lean.
a screwed up maf will not send the correct signal to the computer to indicate the correct airflow.. if you put an uncalibrated maf on the car like an ls6 maf or a truck maf or any aftermarket maf or any ported/descreened stock maf theres no telling exactly what you will get going to the computer unless you can calibrate for it in the computer (edit)
the ones going lean are from the stock electronics being used (and not recalibrated) in a larger housing.. larger housing allows more air past the resistors than it is calibrated for.. more unmeasured air in the engine means less fuel gets injected... which means lean.
TECH Senior Member
Joined: Nov 2001
Posts: 9,246
Likes: 3
From: Troy, AL
Re: So if an MAF makes you run leaner... Soundengineer, you're talking about part throttle cruising efficiency. Sharky was speaking about on the dyno and also about when using nitrous both of which are done at WOT. Stoichiometric has nothing to do with WOT mixture. 13.8:1 is REALLY on the lean side for even NA power at WOT Not kinda on the lean side. I mean REALLY on the lean side to the point that you're missing some power. Now, try that while running nitrous and you could be sporting some nice new holes in the tops of your pistons. It would be better to get that mixture to about 12:1 for nitrous.