General consensus on MAF screens?
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Re: General consensus on MAF screens? (GlockLT4)
Gainesville Fl
Been in National events for months!
Drag racing may still be open, Road course is filled up
:seeya
:steering:
Been in National events for months!
Drag racing may still be open, Road course is filled up
:seeya
:steering:
Pro
Joined: Oct 2002
Posts: 515
Likes: 0
From: Everett WA
Re: General consensus on MAF screens? (OneRedLT4)
I haven't taken off my MAF, but when I do, is the screen removed by disassembling the MAF? I can't imagine that people would cut it out.
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Re: General consensus on MAF screens? (R94 LT 1)
According to TPIS' airflow testing, the MAF flows 529 stock, with the screens and heat sinks in.
With screens out it flows 711 and with the heat sinks out another 39.
With all the twists and turns that the air has to make to just get from the MAF to the valve, I doubt that there's much straightening of the airflow going on anyway.
Horzonally into the plenum, then verticle to enter the runner, then vertrically downward through the runner curving as it goes, then horizonally again through the intake manifold and finally another downward incline verticle curve to reach the valve. Pretty tortuous route if you ask me.
Jake
With screens out it flows 711 and with the heat sinks out another 39.
With all the twists and turns that the air has to make to just get from the MAF to the valve, I doubt that there's much straightening of the airflow going on anyway.
Horzonally into the plenum, then verticle to enter the runner, then vertrically downward through the runner curving as it goes, then horizonally again through the intake manifold and finally another downward incline verticle curve to reach the valve. Pretty tortuous route if you ask me.
Jake
Thread Starter
Team Owner
Joined: Apr 2001
Posts: 22,267
Likes: 3
From: Dallas TX
Re: General consensus on MAF screens? (JAKE)
According to TPIS' airflow testing, the MAF flows 529 stock, with the screens and heat sinks in.
With screens out it flows 711 and with the heat sinks out another 39.
With all the twists and turns that the air has to make to just get from the MAF to the valve, I doubt that there's much straightening of the airflow going on anyway.
Horzonally into the plenum, then verticle to enter the runner, then vertrically downward through the runner curving as it goes, then horizonally again through the intake manifold and finally another downward incline verticle curve to reach the valve. Pretty tortuous route if you ask me.
Jake
With screens out it flows 711 and with the heat sinks out another 39.
With all the twists and turns that the air has to make to just get from the MAF to the valve, I doubt that there's much straightening of the airflow going on anyway.
Horzonally into the plenum, then verticle to enter the runner, then vertrically downward through the runner curving as it goes, then horizonally again through the intake manifold and finally another downward incline verticle curve to reach the valve. Pretty tortuous route if you ask me.
Jake
Large Impressive Member
Joined: Jul 2003
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Re: General consensus on MAF screens? (GlockLT4)
So on yet another subject, the general concensus on this general consensus is that there is no general consensus............... :crazy: :confused: :rolleyes:
Team Owner
Joined: Jan 2003
Posts: 20,298
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From: Summerland B.C. Canada
Re: General consensus on MAF screens? (Corvette Kid NC)
So on yet another subject, the general concensus on this general consensus is that there is no general consensus...............
[Modified by AGENT 86, 5:42 AM 1/19/2004]
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Melting Slicks
Joined: Nov 2003
Posts: 3,375
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From: Northern CA
Re: General consensus on MAF screens? (Corvette Kid NC)
So on yet another subject, the general concensus on this general consensus is that there is no general consensus............... :crazy: :confused: :rolleyes:
Team Owner
Joined: Jul 2002
Posts: 22,267
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From: The light that never warms.
St. Jude Donor '12
Re: General consensus on MAF screens? (xs650)
I've got four sets of those things in my toolbox! Two each from a LB9 Trans Am and the Vette. Never had a problem.
Burning Brakes
Joined: Nov 2001
Posts: 1,241
Likes: 9
From: Houston TX
Re: General consensus on MAF screens?
scientific results:
'96 LT4, all dyno runs with wideband, pains taken to insure consistency in coolant and oil temps.
on my car, removing the screens made no difference on the dyno, at any rpm. it also did not appreciably change the a/f ratio at WOT. according to the real-time scanner, the fuel trims remained the same at idle and cruise.
given no perceived or measurable difference, i would have preferred to keep it. however, i unwittingly damaged it during removal, and so have run without it since.
'96 LT4, all dyno runs with wideband, pains taken to insure consistency in coolant and oil temps.
on my car, removing the screens made no difference on the dyno, at any rpm. it also did not appreciably change the a/f ratio at WOT. according to the real-time scanner, the fuel trims remained the same at idle and cruise.
given no perceived or measurable difference, i would have preferred to keep it. however, i unwittingly damaged it during removal, and so have run without it since.
Melting Slicks
Joined: Apr 2000
Posts: 3,198
Likes: 2
From: Northern CA
Re: General consensus on MAF screens? (JAKE)
According to TPIS' airflow testing, the MAF flows 529 stock, with the screens and heat sinks in.
With screens out it flows 711 and with the heat sinks out another 39.
With screens out it flows 711 and with the heat sinks out another 39.
Melting Slicks
Joined: Nov 2003
Posts: 3,375
Likes: 1
From: Northern CA
Re: General consensus on MAF screens? (JasonL)
According to TPIS' airflow testing, the MAF flows 529 stock, with the screens and heat sinks in.
With screens out it flows 711 and with the heat sinks out another 39.
Sounds like you are referring to the L98 MAF, which is totally different from the LT1/LT4 unit. The latter only has one screen, and no heat sinks.
With screens out it flows 711 and with the heat sinks out another 39.
Sounds like you are referring to the L98 MAF, which is totally different from the LT1/LT4 unit. The latter only has one screen, and no heat sinks.
The more optimistic claims are for about a 5 hp gain. The flow increase reported is from 529 cfm on a stock stock L98 to 711 cfm and this results results in only a claimed 5 hp increase by most reports.
The 5 hp increase indicates that the as installed flow increase in a real functioning intake system was no more than about 7 cfm.
Dick
[Modified by xs650, 1:27 PM 1/20/2004]