Home ported MAF vs. aftermarket??
Home ported MAF vs. aftermarket?? I just picked up a 2000 WS6 that currently has a lid, maf bellow, and loud mouth. I have a friend that has a 2002 Z28 and he recommends just porting my MAF (and adding a 1k resistor) rather than picking up and 85mm aftermarket piece. I'm just looking for other experiences and opinions. Thanks.
Many many people have complained of problems when porting their MAF, especially in automatics. Some say it screws up the air/fuel ratio too much, others screw up the wires inside and have to get a new one.
Anyways, my point being that it's not really worth anything considering the stock maf is good up to around 500 hp.
By the way, I ported my own MAF and ran into no problems, but I didn't notice a gain either.
Anyways, my point being that it's not really worth anything considering the stock maf is good up to around 500 hp.
By the way, I ported my own MAF and ran into no problems, but I didn't notice a gain either.
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Joined: Sep 2003
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From: "Tr"Asheville
Well being that I have a stock one and a ported one and own HPTuners let me tell you this....when scanning the ported one with NO resistor made my ltrims go 15% leaner at part throttle (+12 to +15). Then with the 1k ohm 1/2 watt resistor it set my ltrims to (-9 to -12) so it took me way rich. I would venture to say you need less than a 1k ohm resistor or the means to tune your MAF table to correctly run a ported MAF. Hope this helps.
-Sly
-Sly
Its really not worth your effort. Dont touch the MAF. You arent going to feel a possible 5 hp gain, and its not worth wasting your money/time on it. Most tuners dont like to tune without a stock MAF. Like slyws6 stated, the cars I have logged with ported MAF's typically run +15 on the ltrims, which is quite lean.
What everyone else said, don't even touch the thing. Your friend is an idiot. Stocker is good up to 450rwhp. Porting will cause the engine to run lean and throw codes. I ported mine, and once I started throwing codes and noticed no gain, I went back to stock. I have put the ported ones back in ONLY because my car is running pig rich after the cam install, and it could be slighly leaner. Once I go in for a tune, I have full intentions of putting the stock ends back on. If you are antsy to mess with it, just remove the screen, and thats it!
The problem with the automatics is reduced line pressure with a ported mass air. This can cause slippage at shift. Not too good for tranny!
I don't know if the aftermarket mass air bodies are calibrated so the fluid line pressure does not reduce. Maybe somebody knows.
If you have enough cam, high flowing/high compression heads, killer intake and exhaust then a little larger mass air will improve hp assuming it calibrated correctly. The factory mass air is equivalent to a 66.2 mm bore. May not be big enough for a hot engine.
I don't know if the aftermarket mass air bodies are calibrated so the fluid line pressure does not reduce. Maybe somebody knows.
If you have enough cam, high flowing/high compression heads, killer intake and exhaust then a little larger mass air will improve hp assuming it calibrated correctly. The factory mass air is equivalent to a 66.2 mm bore. May not be big enough for a hot engine.
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Originally Posted by Ferocity02
What everyone else said, don't even touch the thing. Your friend is an idiot. Stocker is good up to 450rwhp. Porting will cause the engine to run lean and throw codes. I ported mine, and once I started throwing codes and noticed no gain, I went back to stock. I have put the ported ones back in ONLY because my car is running pig rich after the cam install, and it could be slighly leaner. Once I go in for a tune, I have full intentions of putting the stock ends back on. If you are antsy to mess with it, just remove the screen, and thats it!
Originally Posted by Josh
I picked up about 4 RWHP with a ported MAF, but my car was tuned for it.
Josh
Josh
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Joined: Sep 2003
Posts: 1,937
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From: "Tr"Asheville
He was using my ported MAF, we did many pulls and they all came to the exact number each time. Put the ported MAF on and he gained 4rwhp. Probably could have gained a little more but it was the last pull and all I did was copy the modified MAF table I had for my car into his tune. Just food for thought....
-Sly
-Sly
