Re: Ported MAF

["Jim and Sharon Brady" <bradyiii@shore.intercom.net>]

Actually a buddy of mine from work and I kicked around the idea of using the
MAF until it is maxed then switching to a MAP sensor.  The voltage (normally
from the MAF) would have to be manipulated via a comparator before feeding
the ECM.  He builds circuits and works on microprocessors for a living and
has also burned custom proms.  He is planning on purchasing an '86 TPI
Corvette.  My idea was to use two MAF's with the sum of the two then divided
by two being fed to the ECM and the fuel and spark tables remapped
accordingly.  Sound doable?  I know, just convert to a '730 ECM with two bar
map and be done with it.  I love the idea of true airflow vs. estimated
airflow.  Any thoughts?

Jim Brady
'87 Monte SS 383 TPI 6 speed
'63 Chevy 327 w/4 speed (Soon to be TPI&400 smallblock and hopefully 5 speed
Tremec)

> Not saying you can't make it work but for emissions this theory does not
> work well....I have seen dual MAF's used but requires the outputs of each
to
> be converted to grms/sec then added together and used as a
> calculation.....From what I have seen no matter what you do with the
ducting
> one MAF will always read different than the one next to it....hth's
> -Carl Summers
>
>
>
> -----Original Message-----
> From: owner-gmecm@diy-efi.org [mailto:owner-gmecm@diy-efi.org]On Behalf
> Of WEG1192@aol.com
> Sent: Saturday, August 12, 2000 3:33 PM
> To: gmecm@diy-efi.org
> Subject: Re: Ported MAF
>
>
> In a message dated 08/12/2000 11:30:37 AM Eastern Daylight Time,
> amattei@mindspring.com writes:
>
> << Ported MAF >>
>
> Anyone considered installing two stock MAF sensors in parallel side by
side
> and then multiplying the gms/sec numbers by two in the ECM calcualtions?
> Would this work to give you more airflow at less pressure drop? All you
> would
> have to do is make sure the air split was done right to give equal
pressure
> drop through each one. Leave one MAF connected to the ECM as normal and
the
> other unconnected as a dummy sensor.
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