Lost power with stock MAF.
Thread Starter
Teching In
Joined: Apr 2003
Posts: 28
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From: L.A.
Lost power with stock MAF. About 2 yrs ago and 23,000K ago I installed a GMAF and a direct-flo lid. The car had like 200K. Got it dynoed at 20,000K and had 321HP 333TQ. They said I had some pinging in the higher RPM. Today I reinstalled my powdercoated red Stock MAF and went for a spin. It felt slower at WOT, noticably 
. Dam. I was told the car takes 300K to relearn the MAF, but not the case while WOT. Im going to install some Kooks LT's in 1 week. Tried to attach the red MAF ends to the GMAF but not compatable. I wonder if the LT work better with the stock or the GMAF? 
Should I give it some time? Can someone please ejumacate me.
. Dam. I was told the car takes 300K to relearn the MAF, but not the case while WOT. Im going to install some Kooks LT's in 1 week. Tried to attach the red MAF ends to the GMAF but not compatable. I wonder if the LT work better with the stock or the GMAF? Should I give it some time? Can someone please ejumacate me. 
Thread Starter
Teching In
Joined: Apr 2003
Posts: 28
Likes: 0
From: L.A.
Re: Lost power with stock MAF. Just an update, I reset my PCM and after about 5 miles of idling at 500RPM and less, its now back and actually feels stronger than before. I hope its not all in my head!
Re: Lost power with stock MAF. You say stock, but then you talk about powdercoat
red ends. MAF ends, like porting, make the MAF
have a leaner result (lower reported airflow than stock output frequency). Whether this is more or
less off than the GMAF, dunno.
Pinging at upper RPM is unacceptable in a safety
(for the motor) sense and means you're leaving
power on the table.
red ends. MAF ends, like porting, make the MAF
have a leaner result (lower reported airflow than stock output frequency). Whether this is more or
less off than the GMAF, dunno.
Pinging at upper RPM is unacceptable in a safety
(for the motor) sense and means you're leaving
power on the table.
Re: Lost power with stock MAF. When you put "k" after every figure, that normally means "thousands". Took me a moment to figure out that that is not what it means to you. 
Are you on the metric system? Then put "Km" after the number.
OK, on the Granatelli MAF: it should provide you with a decent HP increase. Know a guy who installed one and took off over a tenth. Same track just 2 weeks later, and very similar weather. I was surprised and impressed that a simple MAF swap took off about .13 in his case. Supposedly, the GMAF's electonics have been recalibrated, which is a feature most of the other "improved" or aftermarket ones don't have. Therefore, the GMAF should not cause you to run lean. The computer will know there is more air and give you more fuel to match.
Are you on the metric system? Then put "Km" after the number.OK, on the Granatelli MAF: it should provide you with a decent HP increase. Know a guy who installed one and took off over a tenth. Same track just 2 weeks later, and very similar weather. I was surprised and impressed that a simple MAF swap took off about .13 in his case. Supposedly, the GMAF's electonics have been recalibrated, which is a feature most of the other "improved" or aftermarket ones don't have. Therefore, the GMAF should not cause you to run lean. The computer will know there is more air and give you more fuel to match.
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Joined: Nov 2001
Posts: 3,048
Likes: 12
From: Raleigh, NC
Re: Lost power with stock MAF. Before I went FI, my Granatelli MAF consistently gave me a tenth to .15 of a second better time.
A definite improvement.
I could see no difference with my SC and it was harder to tune, so I took it off. It's sitting on a shelf in my garage.
DEFINITELY a great mod NA.
A definite improvement.
I could see no difference with my SC and it was harder to tune, so I took it off. It's sitting on a shelf in my garage.
DEFINITELY a great mod NA.
