you're not rambling that was a lot of good info...... and obsession is
different then wanting to learn more, thats what i want!!!
TJ
----- Original Message -----
From: "Shane Moseley" <smoseley@ix.netcom.com>
To: <dakota-truck@buffnet.net>
Sent: Saturday, March 24, 2001 7:41 PM
Subject: Re: DML: IAT box & dyno results -- tech discussion
> TJ Goettner wrote:
>
> > where exactly on that site?
>
> Sorry - I can't point to an exact location. I seem to go off on tangents
every
> time I visit that one. In general tho - one might think that a direct
> measurement of actual air flow in real time would always be better than
> calculating it. I wondered myself for a long time. Even wanted a
MAF-based EFI
> setup myself because I see how easy the mustank boys have it w/mods. The
most
> confusing part is that none of the aftermarket vendors even offer a
MAF-based
> setup.
>
> Then after doing lots of reading on the subject - I found that a MAF-based
setup
> can have problems like air vortex missing the calibrated measuring
position,
> loosing calibration over time, getting the "hot-wire" contaminated, and
lots of
> other reasons that result in a very inaccurate estimate of the actual air
flow.
> The devils advocate in me said "But how does a MAP-based setup differ?
Surely
> it has problems as well????"
>
> So then I did alot of reading on MAP based systems (ok so I'm a little
obsessive
> 8). Turns out the MAP-based system do indeed have problems as well (like
when
> the MAP sensor looses its ability to sense a wide range of vacuum) but
they are
> apparently cheaper to build? huh? That didn't make sense? More
reading....
>
> Bernd is right that some of the best avail factory EFI setups use BOTH MAP
and
> MAF - I'm guessing that they correlate the info in an attempt to get a
more
> accurate estimation of the intake air and thus fuel requirements at that
point
> in time. Guess we could study Formula One as those guys don't play! I
have
> talked to the McClaren team (at CA-World - they run Unicenter TNG on the
car!)
> and just to give you an idea...they said that some teams will be bringing
their
> own dynos over here (North America) because there are no dynos known to
exist in
> the states that will work with the power range of the Formula 1 engines
> (12-18,000rpms).
>
> Better stop - I'm rambling again...
>
> Latr,
>
> Shane
>
> --
> '96
IndyRam-HisIndy-MPI/TB/Pulleys/AccelCoil/MPComp/HookerSuperComps/CompTAs
> '96 IndyRam-HerIndy-numbered(#142)"Track Truck"
> '74 Triple-Black Dodge Challenger Rallye 360 home-brew EFI R&D vehicle
> '68 Black Corvette Convertible 427 (For Sale)
>
>
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