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Maxing the MAF

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Old Aug 23, 2004 | 03:39 PM
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Default Maxing the MAF
what RPM are you guys maxing your mafs?

on autotap mine shows
rpm maf
4503 405.4
4792 439.9


i have a 98 so 439 is my max stock maf

does maxing the maf sooner in the rpm range mean you are making more power?
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Old Aug 23, 2004 | 05:30 PM
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68lb/min around 5200 rpms...stock maf/table

yes...higher/quicker numbers mean more POWAH!!!
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Old Aug 23, 2004 | 09:09 PM
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4600 Rpm.
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Old Aug 23, 2004 | 09:43 PM
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What are the symptoms of maxing the MAF??

Mine starts reading weird negetive #s at WOT over 4800rpm on my truck
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Old Aug 23, 2004 | 11:45 PM
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Originally Posted by F8L Z71
What are the symptoms of maxing the MAF??

Mine starts reading weird negetive #s at WOT over 4800rpm on my truck

there arent any symtoms per say...but if you log MAF and RPM the value of the maf will climb as the rpm increases..and sooner or later it will max out.

98 cars max out at 439
99+ cars get 511
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Old Aug 24, 2004 | 12:25 AM
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Any info on the zo6 maf...
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Old Aug 24, 2004 | 02:22 PM
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It actually has to do with the PCM MAF table, rather than the MAF.

A ported MAF will max out *slightly* later than a screened MAF, but not significantly (due to the different shape of the transfer function).

-Kevin
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Old Aug 24, 2004 | 04:22 PM
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wow..."maf transfer function" there is a phrase that i haven't seen on a ls1 forum before.

Sounds like somebody has some expierence with good ford tuning software

Ryan
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Old Aug 24, 2004 | 04:48 PM
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What does it max out at withe the Granetelli 85MM MAF?? 512 like the 99+ cars??
Thanks
Kyle
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Old Aug 25, 2004 | 09:42 AM
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I'm curious too as I'm maxing my MAF (98 here too) and tuning after a new fuel system will include attempting to add the 99+ calibration into the PCM using LS1_Edit or HPTuner.

I like the powah too
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Old Aug 25, 2004 | 03:12 PM
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Any more info on this.... i know alot of us will be seeing this problem this year.
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Old Aug 25, 2004 | 03:13 PM
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the maf table in 98s or shorter I think so you just can't add the 99+ table. all you can do is max the maf and then add fuel in the pe vs rpm table.
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Old Aug 25, 2004 | 04:20 PM
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i lost my old a-tap files from when i was running a maf..yes it was only a 98 spread but was still pegging at 3500rpm too bad that was pretty much all she had at the time
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Old Aug 25, 2004 | 04:38 PM
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a simple maf table won't fix the problem.

but it can be worked around

Ryan
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Old Aug 25, 2004 | 05:12 PM
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Originally Posted by slow
wow..."maf transfer function" there is a phrase that i haven't seen on a ls1 forum before.

Sounds like somebody has some expierence with good ford tuning software

Ryan
It has nothing to do with brand names..............it has to do with controls engineering.
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Old Aug 25, 2004 | 06:55 PM
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agreed...

Ryan
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