MAF which one?

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Apr 7, 2003 | 08:20 AM

69LS1

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From: South Florida

MAF which one?

What MAF do you recommend? Will a MAF from a Zo6 work on a 98 ls1? If so does anyone have the part number? My ls1 is stock except for the exhaust and all the emissions are removed. I will in the future add some performance mods so I would like the MAF to keep up with that. Your advice is greatly appreciated.

Apr 7, 2003 | 09:21 AM

bgreen

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From: Chicagoland

Re: MAF which one?

What kind of mods are you planning on adding?
(what is your goal for hp/et?)

Will you have the ability to reprogram your pcm?

Apr 7, 2003 | 10:19 AM

Speartech

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Re: MAF which one?

It will work, but the 97-98 LS1 PCM has the SHORTEST MAF table of them all. This means the accuracy at BOTH ends of the table (idle and high load) suffers some. The 99-00 PCM added the high load table entries, and then the 01-02 PCM added a bunch of low end table entries for good idle control with the big diameter MAF.

My opinion would be to stay with the F-body MAF for OVERALL good performance. It does depend somewhat on what power level you plan to build the engine to.

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Apr 7, 2003 | 11:00 AM

bgreen

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From: Chicagoland

Re: MAF which one?

I'd say for best results, to go with a calibrated MAF, basically as GM shipped it from the factory, in some vehicle. Then reprogram the PCM with the table entries for that MAF. Use a MAF with ported/custom ends/screen removed and what not, and you may have to custom tune the MAF entries - no fun.

I'm using one of the 85mm truck MAF's in my setup, but that was just because I found one cheap, and I'll be using a truck motor.

Apr 8, 2003 | 08:30 AM

69LS1

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From: South Florida

Re: MAF which one?

Thanks for the advice to all. I will have to get the pcm reprogrammed for my application. I am leaning towards external bolt ons and maybe a nitrous system later. Currently the engine has a larger TB, Z06 intake and street and performance headers. I am building a 2 1/2 exhaust with an x pipe and dynomax mufflers. It sounds like the best bet is to get a stock f body maf and port it. Thanks again

Apr 8, 2003 | 02:13 PM

bgreen

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From: Chicagoland

Re: MAF which one?

It sounds like the best bet is to get a stock f body maf and port it.

Porting is what i'd stay AWAY from. When you do this, you are straying from the factory calibrated mass air flow data, which is in the computer. If you use an LS6 or truck MAF, you can retain the factory calibration by using the data entered in the Z06 or truck tables.

That's just me though.

Apr 8, 2003 | 02:34 PM

Speartech

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From: Anderson, Indiana

Re: MAF which one?

I too would not port the MAF. It just throws things off. But for the reasons I listed above, I would skip using the LS6 MAF with a 98 computer.

I would use the stock LS1 MAF, and when you start to overpower it, then go a different route.

That's just ME though. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

__________________

91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno

www.speartech.com