MAF porting? i need advice
06-22-2007, 02:04 PM
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MAF porting? i need advice ok i know that this topic has been talked about dozens of times. but i cant find the answer to my question. i ported the factorty MAF ( just cut out the end pieces). i did this without checking here first. but sence i have noticed alot of people talking about how it is a BAD idea and can cause lots of problems without a tune. well there arnt any tuners around my area and money is real real tight right now. after i did the porting the car actually seemed to run ALOT better. i have put about 5k on the car sence with NO problems at ALL the car runs AWSOME. gets 24+ MPG, no engine lights, and runs low 12s all day long. is the MAF porting only a problem on some cars or do i have a problem that just isnt showing it self yet?
06-22-2007, 02:36 PM
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More air is coming in the engine without the MAF knowing, because it doesn't know it has been ported. This makes the car run lean., which leads to more power.
This means your engine will explode in 173,000 miles and not 175,000. Don't worry about it, and be happy with your free mod.
This means your engine will explode in 173,000 miles and not 175,000. Don't worry about it, and be happy with your free mod.
06-22-2007, 02:57 PM
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thats cool! i am sure i am wrong but cant the computer adjust the A/F ratio enough to keep the car running safe? and if it were running lean wouldnt it throw a engine light?
06-23-2007, 03:50 AM
#5
heres the thing....whats the size of the actual maf compared to the maf ends now....its still the same, i dont understand why people port things or get this tb or that...when overall there is still a part in the intake system that hasnt changed...regardless if your port everything...accept for one thing, that one thing will determine how much air will go in...its the dynamic...
for example you can port a tb or throw a bigger one onto a stock ls1 manifold but since you didnt do anything to the manifold, THAT is how much air your going to get in....?understand me?
for example you can port a tb or throw a bigger one onto a stock ls1 manifold but since you didnt do anything to the manifold, THAT is how much air your going to get in....?understand me?
06-23-2007, 11:07 AM
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Originally Posted by WILWAXU
If it runs too lean, yes it will throw a light.
With a stock or near stock setup the ported ends are not as evil as most would have you think. Once you start messing with aftermarket tuning is where you start having problems with ported ends.
With a stock or near stock setup the ported ends are not as evil as most would have you think. Once you start messing with aftermarket tuning is where you start having problems with ported ends.
06-23-2007, 11:43 AM
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Originally Posted by staringback05
heres the thing....whats the size of the actual maf compared to the maf ends now....its still the same, i dont understand why people port things or get this tb or that...when overall there is still a part in the intake system that hasnt changed...regardless if your port everything...accept for one thing, that one thing will determine how much air will go in...its the dynamic...
for example you can port a tb or throw a bigger one onto a stock ls1 manifold but since you didnt do anything to the manifold, THAT is how much air your going to get in....?understand me?
for example you can port a tb or throw a bigger one onto a stock ls1 manifold but since you didnt do anything to the manifold, THAT is how much air your going to get in....?understand me?
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06-23-2007, 12:00 PM
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i believe it's the absense of the screen that makes the difference in power - not being ported. removing the screen slows down air velocity going past the sensor in the maf that adds a degree or two of timing plus dumping more fuel IIRC.
06-23-2007, 01:16 PM
#9
Originally Posted by imslow
i believe it's the absense of the screen that makes the difference in power - not being ported. removing the screen slows down air velocity going past the sensor in the maf that adds a degree or two of timing plus dumping more fuel IIRC.
if removing an obstruction is not worth it?
i notice a difference from stock to ported.
ported runs a bit lean with out tuning but there is a difference.
06-23-2007, 01:25 PM
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Originally Posted by staringback05
heres the thing....whats the size of the actual maf compared to the maf ends now....its still the same, i dont understand why people port things or get this tb or that...when overall there is still a part in the intake system that hasnt changed...regardless if your port everything...accept for one thing, that one thing will determine how much air will go in...its the dynamic...
for example you can port a tb or throw a bigger one onto a stock ls1 manifold but since you didnt do anything to the manifold, THAT is how much air your going to get in....?understand me?
for example you can port a tb or throw a bigger one onto a stock ls1 manifold but since you didnt do anything to the manifold, THAT is how much air your going to get in....?understand me?
I understand what you're saying, and my question isnt meant to argue with you, just asking a question here:
Are we really maxing out the air that goes into an LS1 manifold??? Or can it handle more air??
The volume of the stock LS1 manifold should allow for a little more flow if you port a tb/maf/etc, no? Otherwise there'd be no need for a lid or FTRA either without doing the LS6 manifold at the same time, yes??
I agree that when the time comes, you'll see more gains from a p/p TB or ported MAF with the addition of the LS6 intake. But would you go so far as to say that any intake mods on 98-00 LS1s are null until you swap out the stock LS1 manifold? I think thats pushing it.
06-23-2007, 02:07 PM
#11
the lid is more for volume, look at the baffles and the depth....your not reaching the highest amount of air going in with that setup...
however after you do those mods, look at it this way....you take a water hose(your mod) and you hook it up to a straw(a stock peice) now....regardless of how much you flow through the hose...the straw is going to restrict it....
example people wanting to put 90mm tb on a ls1 manifold
however after you do those mods, look at it this way....you take a water hose(your mod) and you hook it up to a straw(a stock peice) now....regardless of how much you flow through the hose...the straw is going to restrict it....
example people wanting to put 90mm tb on a ls1 manifold
06-23-2007, 02:21 PM
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Originally Posted by staringback05
look at it this way....you take a water hose(your mod) and you hook it up to a straw(a stock peice) now....regardless of how much you flow through the hose...the straw is going to restrict it....