Measuring air flow

Brian Dessent brian at dessent.net
Fri Jan 25 19:25:56 GMT 2002


Bruce wrote:

> Sounds well wothin the flow of a LT MAF sensor, and the freq/grm/sec are in
> the archives
> Bruce

I believe this is the message to which Bruce is referring:

From: john spears <speartec at iquest.net>
Date: Thu, 11 Jul 96 18:54 EST
Subject: RE: GM mass airflow sensor

I've seen several questions/comments about the output of GM MAF sensors.
I
ran an airflow vs. frequency output today on the LT1 MAF that is used on
the
high output aluminum head version (F and Y car) and also on the LT4 (Y
car).
This is the largest diameter MAF sensor (3.5" O.D.) used on GM engines I
beleive, so it would support the most HP. The flow is in grams/second
and
the output is in kilohertz.

         5gm/sec =  2 khz (idle)
        50gm/sec = 5.0khz
       100gm/sec = 6.7khz
       150gm/sec = 7.7khz
       200gm/sec = 8.5khz
       250gm/sec = 9.2khz
       300gm/sec = 9.7khz
       335gm/sec = 10 khz (max)

I hope that's of some value.

 John Spears
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