LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Upgrading MAF. Which one?

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Old 11-03-2009, 11:48 AM
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Default Upgrading MAF. Which one?

With the new build I'm pretty sure I'm going to surpass the limits of the stock MAF. I've done some searching but am a little confused on which part number I need.

GM 25341604
-- or --
GM 25318411 which is replaced by 15904068

They both appear to be 85mm but which one should I use?
Old 11-03-2009, 11:51 AM
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These are Z06 maf's btw
Old 11-03-2009, 11:55 AM
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Yeah, they both have a multitude of applications. I just don't know the differences.
Old 11-03-2009, 12:00 PM
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just a tip fellas they came on trucks as well and their are several ebay guys selling them for $20 and many places selling adapters for $20-25 shipped.
Old 11-03-2009, 12:41 PM
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go to sd and save the money.
Old 11-03-2009, 01:11 PM
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The 85MM MAF with a stock ECU has less of an operating range the then stock MAF from what I understand. We had nothing but issues with my car above 5K rpm and went back to a stock unit.

though we did make a little more power we could not get the A/F to be accurate

SD would be the way to go, but from what I read it's very time consuming
Old 11-03-2009, 01:31 PM
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Originally Posted by transamsam98
just a tip fellas they came on trucks as well and their are several ebay guys selling them for $20 and many places selling adapters for $20-25 shipped.

Kyle.....this might be the way to go.
Old 11-03-2009, 01:37 PM
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Originally Posted by transamsam98
just a tip fellas they came on trucks as well and their are several ebay guys selling them for $20 and many places selling adapters for $20-25 shipped.
Yep, I knew about them being on the trucks too but which part number? Thx.
Old 11-03-2009, 01:39 PM
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Originally Posted by LS1 SPEED
The 85MM MAF with a stock ECU has less of an operating range the then stock MAF from what I understand. We had nothing but issues with my car above 5K rpm and went back to a stock unit.

though we did make a little more power we could not get the A/F to be accurate

SD would be the way to go, but from what I read it's very time consuming
That's good info Larry. If I can find one of these $20 ones then maybe I can test it out and revert back if I need to.
Old 11-03-2009, 01:41 PM
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the next time im home ill get whatever information i can for you and put it up
Old 11-03-2009, 01:47 PM
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Originally Posted by Formula383
That's good info Larry. If I can find one of these $20 ones then maybe I can test it out and revert back if I need to.
Sean had no problems with his nor did I way back when. Should work fine with the correct maf tables.
Old 11-03-2009, 02:09 PM
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Just get rid of the MAF
Old 11-03-2009, 03:59 PM
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+1 for SD

Wasnt Moe B making 640rwhp with a stock MAF sensor? I think the stock sensor can handle more than folks give it credit for. Just dont go aftermarket. From every tuner Ive talked too, aftermarket MAF sensors are junk and a pain in the a$$ to tune.

Might be some value and 'smoothing' it up but thats all Id do if it was me. Of course Im SD so its not me

GL man.
Old 11-03-2009, 04:25 PM
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I too also thought the stock MAF was good for quite a bit of power?

I went speed density, as did two of my other buddies.
Old 11-03-2009, 04:52 PM
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SD is full of win. easy to tune, snappier throttle response imo, and you can run an open tb at the track
Old 11-03-2009, 09:01 PM
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Originally Posted by Wicked94Z
SD is full of win. easy to tune, snappier throttle response imo, and you can run an open tb at the track
agreed.



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