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85mm maf and water pump question

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Old Sep 11, 2012 | 04:49 PM
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ldyzluvdis06's Avatar
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Default 85mm maf and water pump question

so im getting ready to instal my cam and heads and was taking off my intake. i have the 85mm intake and TB but noticed what looks to be a stock maf (bought it like that) now in my head that makes no sense! it wont pull in more air then the smallest diameter item....correct? should i ditch the stock maf and pick up a 85mm?

im not ditching it all and going with a FAST...it's either leave it as is, or buy 85mm maf, just wondering what i should do.


also, the 98 t/a that i am installing H/C on has 134K miles. while im here should i go ahead and replace the water pump also? are they prone to going out?

thanks in advance.
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Old Sep 11, 2012 | 09:55 PM
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I believe you'll run into issues with with the 1998 pcm not having enough adjustment in the MAF tables for the 85mm mafs.
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Old Sep 12, 2012 | 08:00 AM
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Originally Posted by 99Bluz28
I believe you'll run into issues with with the 1998 pcm not having enough adjustment in the MAF tables for the 85mm mafs.
okay. is there something else advised then? how are 98's able to run a FAST intake/tb?
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Old Sep 12, 2012 | 08:22 AM
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I have a 129,xxx on the clock and my water pump was fine before heads and cam i thought but when i finished the build the.water.pump went out while trying to bleed the coolant system. But i went ahead while i was in there new ported oil pump all new pulleys and belts all new sensors ect .
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