Attn Tuners: MAF Voltage Question
Senior Member
Joined: Jul 2003
Posts: 265
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From: Coleman, MI
Originally Posted by Almightywad
There seems to be a lot of differing opinions on what constitutes a pegged MAF here and on NLOC. So, I've got a couple of questions to hopefully get a definitive answer.
I put my 03 L on a dynojet and @ 5300 rpm my MAF V read 4.92. My dyno chart showed the A/F going rich at that rpm which means it was doing its job.
#1-- Should I be concerned with that voltage since it was on the dyno and not the street (load factors)? It was 64 degrees.
#2-- What MAF voltage range is SAFE to run the stock 90mm?
I have a ported eaton, 6# lower, cai, extrude honed upper, stock manifolds, bassani mids w/ high flow cats, and bassani catback.
I put my 03 L on a dynojet and @ 5300 rpm my MAF V read 4.92. My dyno chart showed the A/F going rich at that rpm which means it was doing its job.
#1-- Should I be concerned with that voltage since it was on the dyno and not the street (load factors)? It was 64 degrees.
#2-- What MAF voltage range is SAFE to run the stock 90mm?
I have a ported eaton, 6# lower, cai, extrude honed upper, stock manifolds, bassani mids w/ high flow cats, and bassani catback.
Senior Member
Joined: Aug 2001
Posts: 3,519
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From: Greater Boston
yeah
I would love to know the same. I am extremely close to pegging mine. My last dyno I logged 3 runs and each run took my MAF to 4.98v. I think thats pretty much pegged.
Senior Member
Joined: Sep 2006
Posts: 175
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From: newark,nj
Originally Posted by LightningTuner
A voltage of 4.92 volts is very close to pegging. Since it was done on a dyno, it may hit 5 volts on the street. But, at 5300 rpms, you probably won't see anything bad from that, considering the truck shifts just a tad higher than that rpm. Still, I'd look into an SCT 2400 or MAFia extender.
There is another factor as well. The factory tune has a max MAF value set to 4.78 volts. If this has not been changed to 4.99 volts in your tune, then that could be an issue as well. I have always done that correction, and I think nowadays, most other vendors are doing it as well.
Hope this helps.
There is another factor as well. The factory tune has a max MAF value set to 4.78 volts. If this has not been changed to 4.99 volts in your tune, then that could be an issue as well. I have always done that correction, and I think nowadays, most other vendors are doing it as well.
Hope this helps.
Senior Member
Joined: Feb 2001
Posts: 1,248
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From: MOTORCITY
Originally Posted by Virilha
Have anyone pegged a SCT ba-2800 ? What MAF did you use when you made 800RWHP+ ?
yes i have.
i went to the guys at professional mass air systems www.massairsystems.com
at 28 psi on the Paxton we were only seeing 4.7 volts
using one of there velocity meters.
Senior Member
Joined: Sep 2006
Posts: 175
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From: newark,nj
Originally Posted by RDY2RAC
yes i have.
i went to the guys at professional mass air systems www.massairsystems.com
at 28 psi on the Paxton we were only seeing 4.7 volts using one of there velocity meters.
i went to the guys at professional mass air systems www.massairsystems.com
at 28 psi on the Paxton we were only seeing 4.7 volts
using one of there velocity meters.
Senior Member
Joined: Feb 2001
Posts: 1,248
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From: MOTORCITY
we put a velocity meter (it may not be on the website yet.) with a sniper 3000 calibration in it. we had a Sniper 3000 meter on it but the flange was a little smaller so we switch to the Velocity to better help the transition of the tubes i already had.