TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
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Old Dec 4, 2006 | 08:19 AM
  #1  
obeymybird's Avatar
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From: PA
Car: 92 camaro RS
Engine: LSA
Transmission: Magnum F
Axle/Gears: TNT 8.8 wavetrac 3.31
maf stock or aftermarket

does anyone know how far you can push the stock maf? im puttin down 300rwhp and just bought a supercharger what should i do?
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Old Dec 4, 2006 | 03:32 PM
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From: Bromley south east london, England
Car: 1987 pontiac trans-am
Engine: 350 tpi
Transmission: 700R4
Axle/Gears: 3;73 with eaton lsd
damn! i wish somebdy would answer this!! id like to know too!!
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Old Dec 4, 2006 | 09:14 PM
  #3  
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From: Tulsa
Car: 86 Omni GLHT
Engine: 2.2 Turbo/Intercooled
Transmission: 5 speed
Axle/Gears: 3:85
the stock one should be fine.....
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Old Dec 4, 2006 | 09:54 PM
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From: south Louisiana
Car: 1985 Z28
Engine: 85 L98
Transmission: 700r4
Axle/Gears: stock 10 bolt-3.73 eaten posi
Modifying the Mass Airflow Sensor- This is a tricky one, and if done wrong, can ruin the part and cost a 'lot' of money for a new one. Only for the seriously hard-core horsepower seeker, and one who is familiar with working with handtools. The modification is in two steps. The first step is to remove the screens in the front and rear of the MAF. This allows for much greater airflow. The screens are not really needed for protection of the hot wire inside the MAF, that is what the air filter upstream is doing. The second step is to grind away the cooling fins inside the MAF. This is the critical operation that can ruin the part if done wrong. It is best for the novice to just remove the screens and leave it at that.

thats all you need.
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Old Dec 4, 2006 | 10:32 PM
  #5  
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From: Uniontown, OH
Car: 87 GTA
Engine: Under Construction
Axle/Gears: 3.70:1
descreening the MAF and cutting the finns will allow the MAF to flow close to 750cfm. when cutting the finns I found that some duct tape around the edges and a hack saw to work the best. then a file to clean up the remaining edges. Hope this helps.

Everybody removes the screens. We go further and re-shape the inside for a dramatic increase in air flow - 750 CFM from the stock 529 CFM. (per TPIS)
Attached Files
File Type: doc
MAF.doc (150.0 KB, 81 views)
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Old Dec 5, 2006 | 05:34 PM
  #6  
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From: Qc,Montreal
Car: 1987 GTA
Engine: High reving 332ci monster
Transmission: T-5
Axle/Gears: 3.73 posi
Originally Posted by 3rdgenZ
one, The second step is to grind away the cooling fins inside the MAF.
Aren't those fins necessary to keep the heating element from over heating at idel?

Best Regards
Skoda
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Old Dec 5, 2006 | 06:30 PM
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From: Uniontown, OH
Car: 87 GTA
Engine: Under Construction
Axle/Gears: 3.70:1
Unless you llive in the desert, or a high heat state where the temps are usually in the 100's it will not be a problem.
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