MAF Screen
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Teching In
Joined: Jan 2006
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MAF Screen Has anyone ever seen any actual improvements in HP/ TQ numbers by removing their MAF screen, I'm going to step up to a 90mm soon so its not a big deal I'm just curious whether or not it actually does anything?
No hp gains. The 97-00 MF is good for about 500 HP and the 01+ is good for about 570 HP...That is engine dyno HP, chassis dyno HP could be anything--most lose 50-80 hp. 90 MAF is great for big cubes, FI and NO2, but can be difficult to tune. GM waited until the LS2 CAN PCM came out before introducing the 90, they felt the regular PCM was not fast enough to handle the needed parameters.
Yes the screen is a restriction and this was one of the combined efforts by GM engineering to get Z06 from 385 hp to 405hp, removing the screen. They found it to be a restriction and really no need for it on a straight shot of air, compared to set-ups that have a 90* turn, then it's good for straighting the air flow out.
Robert
Robert
GM was able to get about 2.5 hp by making the change, they also changed the PCM tune get the HP. 15 of the HP came from the Head and cam changes and another 2.5 from the air filter change. That was from the cheif engineer on the project.
Originally Posted by Gordy M
GM was able to get about 2.5 hp by making the change, they also changed the PCM tune get the HP. 15 of the HP came from the Head and cam changes and another 2.5 from the air filter change. That was from the cheif engineer on the project.
Robert
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Launching!
Joined: Sep 2004
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From: Honolulu-Hi
Most the gains were from the new zo6 cam.
Leave your screen in,it evens the air flow thru the MAF for a better a/f mix,some folks go lean as some air passes thru the MAF unmetered,on my c5,i ported the MAF,descreened it,and i would always go into the low octane table (drops timing),due the car going lean and knocking.Read the tunning section,#1 MAF mod...leave it stock.
Leave your screen in,it evens the air flow thru the MAF for a better a/f mix,some folks go lean as some air passes thru the MAF unmetered,on my c5,i ported the MAF,descreened it,and i would always go into the low octane table (drops timing),due the car going lean and knocking.Read the tunning section,#1 MAF mod...leave it stock.
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Originally Posted by H-5-L
Most the gains were from the new zo6 cam.
Leave your screen in,it evens the air flow thru the MAF for a better a/f mix,some folks go lean as some air passes thru the MAF unmetered,on my c5,i ported the MAF,descreened it,and i would always go into the low octane table (drops timing),due the car going lean and knocking.Read the tunning section,#1 MAF mod...leave it stock.
Leave your screen in,it evens the air flow thru the MAF for a better a/f mix,some folks go lean as some air passes thru the MAF unmetered,on my c5,i ported the MAF,descreened it,and i would always go into the low octane table (drops timing),due the car going lean and knocking.Read the tunning section,#1 MAF mod...leave it stock.
Robert