A4 and ported MAF Ends...
A4 and ported MAF Ends... I have heard that porting the MAF Ends on an A4 car reduces line pressure. Could I use the ported ends if I have a HPP3 to raise line pressure?? Anyone done this?? <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
Re: A4 and ported MAF Ends... I have the 85mm MAF on my auto SS and have no trans problems. Don't honestly see how the tow can be related, but with todays cars how knows.
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From: Earth
Re: A4 and ported MAF Ends... " Don't honestly see how the tow can be related, but with todays cars how knows."
I'm not 100% sure, but I believe the PCM looks at MAF flow rates to determine transmission line pressure. A ported MAF or MAF ends allows "undetected" air to pass. As a result, the PCM doesn't increase line pressure to compensate.
Someone else want to chime in here?
I'm not 100% sure, but I believe the PCM looks at MAF flow rates to determine transmission line pressure. A ported MAF or MAF ends allows "undetected" air to pass. As a result, the PCM doesn't increase line pressure to compensate.
Someone else want to chime in here?
Re: A4 and ported MAF Ends... Do a search on it, there's been tons of discussion on it before. General concensus (including my own) is that it's a DO-NOT-DO kinda mod. Tranny shifts all sloppy with MAF ends, I took that crap off immediately and put the stock ones back on.
Dope
Dope
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Joined: Jan 2002
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From: Earth
Re: A4 and ported MAF Ends... I don't have any personal experience with GMAF's, but it's my opinion that the MAF is not a good thing to mod. The only thing I'd consider doing is putting MAF ends on a M6. The stock MAF can handle well over 450rwhp and I'm pretty sure much more than that.
"does that go for GMAFS also. there was $300 down the tube."
At least it looks nice. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
"does that go for GMAFS also. there was $300 down the tube."
At least it looks nice. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
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Speed freak
Joined: Dec 2001
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From: Tulsa, OK
Re: A4 and ported MAF Ends... </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by camaro_ls1:
<strong>
I'm not 100% sure, but I believe the PCM looks at MAF flow rates to determine transmission line pressure. A ported MAF or MAF ends allows "undetected" air to pass. As a result, the PCM doesn't increase line pressure to compensate.
Someone else want to chime in here? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Correct. But the damage, if any, is so minimal it would go unnoticed. You probably wouldn't see anything until later down the road. I have an A4 with ported MAF ends and 80k miles on my car. I race quite often too. Haven't ever had any problems with the tranny. Then again, every car is different.
<strong>
I'm not 100% sure, but I believe the PCM looks at MAF flow rates to determine transmission line pressure. A ported MAF or MAF ends allows "undetected" air to pass. As a result, the PCM doesn't increase line pressure to compensate.
Someone else want to chime in here? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Correct. But the damage, if any, is so minimal it would go unnoticed. You probably wouldn't see anything until later down the road. I have an A4 with ported MAF ends and 80k miles on my car. I race quite often too. Haven't ever had any problems with the tranny. Then again, every car is different.
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Verdad Gallardo Administrator
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From: Earth
Re: A4 and ported MAF Ends... Hey DevilBird...I have a question for you. Do you ever hit the rev limiter while at the track? I've hit the limiter a few times with just a descreened MAF. I don't think that has anything to do with it actually. My tranny fluid was a bit low. I'm sure that was the culprit.
Speed freak
Joined: Dec 2001
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From: Tulsa, OK
Re: A4 and ported MAF Ends... </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by 1/4master:
<strong> or does it not effect GMAFs since they are calibrated for more airflow? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Its calibrated...so don't worry, you're cool <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
<strong> or does it not effect GMAFs since they are calibrated for more airflow? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Its calibrated...so don't worry, you're cool <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Speed freak
Joined: Dec 2001
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From: Tulsa, OK
Re: A4 and ported MAF Ends... </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by camaro_ls1:
<strong> Hey DevilBird...I have a question for you. Do you ever hit the rev limiter while at the track? I've hit the limiter a few times with just a descreened MAF. I don't think that has anything to do with it actually. My tranny fluid was a bit low. I'm sure that was the culprit. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Keep your tranny fluid full. Mine used to do it when my tranny fluid was a little low. Filled it back up and no more bouncing off the limiter. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
<strong> Hey DevilBird...I have a question for you. Do you ever hit the rev limiter while at the track? I've hit the limiter a few times with just a descreened MAF. I don't think that has anything to do with it actually. My tranny fluid was a bit low. I'm sure that was the culprit. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Keep your tranny fluid full. Mine used to do it when my tranny fluid was a little low. Filled it back up and no more bouncing off the limiter. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
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From: houston,texas
Re: A4 and ported MAF Ends... Well I have an a4 98 and I ran the ported ends for a while and while at the track...it slipped and I stopped from there and had the tranny checked.....So I had the fluid change and everything done and it fixed the slipping and I was still running the ported ends...mind you no pimging!!!......then I bought a pair of stock ends with the screen in em and noticed no major difference either.....no tranny problems so I think it depends on the car and the condition of your tranny whether its well lubed and it is kept in good maintainance....which I read often that these trannies are very vulnerable when not serviced.....which usually tends to be the cause sometimes.....but it just depends....just my 2 cents..... <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
