ported maf ends
Thread Starter
TECH Apprentice
Joined: Mar 2003
Posts: 320
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From: Brentwood,Tn
ported maf ends Are they good or bad for automatic cars,I just put thunder racings ported maf ends on my car and noticed a little difference in the way it shifts???I have heard alot of mixed thoughts about it messing up the airflow and sending wrong signals to the tranny(telling it its under a load)????I really need a straight awnser cuz im on my third transmission already.lol,Thanks
Teching In
Joined: Jun 2003
Posts: 30
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From: Boca Raton Florida
Id take them off. I dont know the exact reason but ported mafs and A4s dont mix. It has something to do with line pressure. You say you feel a difference as is and that cant be a good thing. Just my 02cents.PS: I just went back to my stock MAF2 weeks ago. Car runs better and gets better milage. I changed out the MAF when my car was less then a week old with less then 200 miles on it.
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TECH Fanatic
Joined: Aug 2003
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From: Lexington, NC
Yea man I would keep the stock MAF with the stock ends, I myself like my GMAF sensor, but most people have problems, you will see best results descreening the stock MAF with the stock ends. Good Luck man
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TECH Veteran
Joined: Aug 2002
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I pick up a tenth and 1 mph in the quarter with my home ported MAF ends but they are only good for about 100 miles. The computer starts adjusting for them after that. BTW: my car has been tuned with LS1Edit for the stock MAF.
Teching In
Joined: Jun 2003
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From: Boca Raton Florida
Plowtown and I quote "my home ported MAF ends but they are only good for about 100 miles. The computer starts adjusting for them after that" I already got in trouble once before over this. That statement is crap. The computer doesnt relearn its a way of selling 85mm MAFs
TECH Veteran
Joined: Aug 2002
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bullshit. Then how come when I drive with them on for 250 miles the car runs better times with the stock MAF ends on?
I'll tell ya. Cause at around 100 miles with the ported MAF on my tranny starts slipping shifting into 3rd gear. When I throw the stock MAF on the car, the shifts firm up. Hence the ported MAF is only good for around 100 miles
I'll tell ya. Cause at around 100 miles with the ported MAF on my tranny starts slipping shifting into 3rd gear. When I throw the stock MAF on the car, the shifts firm up. Hence the ported MAF is only good for around 100 miles
Last edited by PlowTown Missile; Nov 30, 2003 at 04:22 PM.
Teching In
Joined: Jun 2003
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From: Boca Raton Florida
Not to get into or start and argument but: Ported MAFs and autos dont mix well 90% of the time. A Ported maf affects the transmissions line preasure. Why exactly I dont remember, because all Ive ever owned is manuals so it went in 1 ear and out the other as it didnt apply to me. Look it up in a search. Its documented on alot of boards. By the way it will always run better with a stock unit.
TECH Fanatic
Joined: Aug 2003
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From: Lexington, NC
Jaysunit, Im going to have to disagree with you, with a little tuning I think you could gain from an aftermarket MAF or ported MAF ends, w/o tuning I think it would be useless. I think it is more of a hassle thought than a gain. Im still running my GMAF and its ok for me. You could slightly increase the line pressure compensate for the loss of pressure when you change MAF's. Good Luck guys
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Teching In
Joined: Jun 2003
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From: Boca Raton Florida
"w/o tuning I think it would be useless. I think it is more of a hassle thought than a gain." I think that says it all right there. I never said a GMAF was a waste. All I said was that ported ends and a A4 generally have negative results. I ran mine ported and descreened up until last week. Im back to stock and getting better mileage. Other then that I have no regrets running it for 18 months ported. Its still descreened just for the heck of it tho. 
Staging Lane
Joined: Nov 2003
Posts: 53
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From: Baltimore, MD
i keep reading about the MAF being bad for autos, but what about a 6 speed, i bought my car two weeks ago and found one already installed in it. should i take it out? or is it alright to use in a manual.
I have had MAF ends on both of my A4 cars and never had an issue with my tranny. I even sprayed the heck out of my Camaro and it held up just fine. No tuning what so ever. Everyone one of my friends that have A4's all have bigger MAF ends and have no problems. Where are you getting this information? So what happens when I put a forced induction piece on my car? Will my tranny just blow up because the MAF is getting so much more air?
2000 SS daily driven - no problems
2000 SS daily driven with converter - no problem
1996 Z28 daily driven with nitrous - no problem
2002 firehawk daily driven with converter - no problem
etc
etc
etc.
2000 SS daily driven - no problems
2000 SS daily driven with converter - no problem
1996 Z28 daily driven with nitrous - no problem
2002 firehawk daily driven with converter - no problem
etc
etc
etc.
Administrator
Joined: Jan 2002
Posts: 45,841
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From: Earth
Angus- Don't roll your eyes too quickly. There are a few guys here that have actually had their trannies grenade over it. I hate to say it...but I think one of them died a short while back in a car accident. 
I believe his name was Chickn? Anyone remember?
I believe his name was Chickn? Anyone remember?