[Diy_efi] Intake manifold flow testing

[Geddes, Brian J]

This was my thought as well.  If I'm gonna invest time and money into =
investigating a potential problem, it seems more logical to attack the =
problem area (manifold flow), rather than looking at downstream results =
(EGT).

- Brian

> If
> there truly is that much difference though, don't you think a=20
> better would
> be to investigate and fix the airflow imbalance?
>=20
> John Stricker
> ----- Original Message -----
> From: "Dave Dahlgren" <ddahlgren at snet.net>
> To: "List for general do-it-yourself EFI talk" <diy_efi at diy-efi.org>
> Sent: Tuesday, February 11, 2003 2:14 PM
> Subject: Re: [Diy_efi] Intake manifold flow testing
>=20
>=20
> > The sad part about this problem is that it most likely=20
> changes with rpm as
> well
> > that is to say they can move around. a rich one at 4500=20
> might be a lean
> one at
> > 6000.  You could probably verify they stay the same by=20
> using some egt
> probes and
> > data logging them along with rpm map and tps..Above all i=20
> think i would
> only
> > want to add fuel.. Best idea is get a better intake manifold.
> > Dave
> >
> > "Geddes, Brian J" wrote:
> > >
> > > All -
> > >
> > > In the online community for my car (Mitsu 3000GT),=20
> there's a sort of
> tribal knowledge that says certain cyliners tend to get more=20
> air than others
> because of the design of the intake manifold, and thus run leaner and
> detonate more frequently.  I don't doubt that this is=20
> true...but no one's
> actually ever done any testing to quantify the problem.  Now that I'm
> running a standalone EMS, I can compensate for this airflow=20
> difference.
> > >
> > > All I have to do, is figure out how much more/less than=20
> average each of
> the runners in the intake manifold tends to get.  Are there=20
> companies out
> there that would do this kind of a test?  Is this something I=20
> could find a
> local shop to do, or would I need to send my intake plenum=20
> out to someone to
> have it tested?  Any suggestions?
> > >
> > > Thanks,
> > > - Brian Geddes
> >
> >
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>=20
>=20
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>=20

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