Can you install a map sensor in place of the stock maf sensor on a 1987 Trans Am 5.7? I want more clearance and Air flow. There use to be a way when the GM stock maf sensors were failing left and right. Anyone out there know how to do this?

 

This would require changing the computer and wiring harness.

I have the same problems w/ my MAF.

Someone on the board mentioned before a company that makes better ones that use a film instead of that crappy thin wire!! I think GMTECH knows who.

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Michael Graeber

My Garage

1)83 Z-28 T-Top: Full cage, 9" w/ lad.bars, Midwest Engine Tech 406sbc,Strip Dominator, Demon Carb, Phase VI Chevy Bowtie heads, .630" Crower roller set-up, 1 3/4 coated Hookers 3" true dual exhaust th400, fuel cell & still not running

2)89 Formula WS-6 305 TPI Auto For the road: minor motor, more suspension stuff. MODS

 

its the Wels unit. it uses a chip and a honeycomb matrix on one end. its like 180.00 or so. i think i remember Vader giving the info on how to get it. its special order from wels i think. anyone ho knows letus know i need one too

-Stell


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1988 IROC 305TPI MINT!!
Mods= Accell SuperCoil, MSD 6A, Ported Plenum, No MAF Screans , K & N, 160 Thermostat+ Temp Switch
And Always Trying To Go Faster

 

You can get the Wells SU-145 at www.wdautoparts.com call (800)288-6728 extension 115 ask for Tom Martin



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GTA -89:Free flow muffler,dual 3" HF cats, Edelbrock headers, Vette heads, 1.52 RR 7/16, ZZ-9 cam, Big Mouth, AS&M LTB, ported plenum, 52 TB, MSD 6AL, TPIS level V prom, Mod .MAF, Superior shift-kit and some minor mods. and more to come!
http://www.itv.se/tacs/members_cars/m279/m279.html (Swedish Trans Am Club)

 

Holy $h!T.

Are you telling me that for approx. $180 I can dump the MAF and install a MAP w/o changing the computer.

Is that all you have to buy?????

Please, let me know.

 

Excuse my ignorance, but could somebody explain the difference between MAF and MAP? TIA!

 

There are two differnet control systems for TPI.

85-89 uses a Mass Airflow Sensor to determine the amount of air entering the intake.

90-92 use a Speed Density system that used a Manifold Absoulute Pressure sensor to measure the amount of pressure in the intake to determine airflow.

You will see a lot of arguemnts over the 2. Facts claim that a MAF system responds better to mods.

Personally, I have had enough trouble w/ the MAF, so I would like to see it gone. Usually, this meant that you would have to change the computer and wiring harness which is a PITA and quite well out of my price range.

What I am hoping is that there is a way to do this with the kit mentioned above and not having to change the ECM.

So can anyone expand on this and let me know???????

 

Its not a kit, its a replacement MAF that uses a different method for measuring the air. If you want to go to a MAP sensor, then you will have to do some wiring changes and swap computers.

 

No, the Wells unit is a replacement MAF sensor that is supposed to be better than the stock GM unit, and cheaper too.

To switch to a MAP setup, you need the computer, wiring harness, and MAP sensor, along with the correct intake plumbing.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

Thank you!!

It was confusing since the orginal question asked:

Can you install a map sensor in place of the stock maf sensor on a 1989 Trans Am 5.7? I want more clearance and Air flow.

I'd rather say with MAF, just realize that the wire filament MAF just don't cut it.

Are these the ones I have heard mentioned before that use a film rather that a wire filament??

Regardless, sounds like a great mod.

They flow the same cfm or better, right?