[Diy_efi] Exhaust gas temp

[gary]

> Interesting.  We used the old dyno at Huffaker's [Sears Point] and
> didn't see the operator do much more than compensate for ambient
> air conditions.
> Since GAMI has it all over me as far as high tech capability, I'll have
> to demur on this point - and say only that we got what we got.

> >> "Raising the compression ratio with no other changes will drop
> >> the EGT at the same AFR."

B.T., my wording was confusing.  What I meant (was supposed to
state) was the SDS site linked, agrees with the GAMI people on SOME
EGT issues, but the SDS quoted statement above, was NOT one of
them.  No test data that I am aware of, from GAMI on that issue.  In this
case, I'll accept actual test data (yours), in lieu of printed (linked)
conflicting statement.  Thanks for sharing the info.

> I remember hearing about that little "disinformation effort" too.

Was it disinformation, or with accountability not being an issue, were
they (writers) given some rope, being allowed to use their imagination,
print it, and then allow it to be believed as fact?   :)

GAS

----- Original Message ----- 
From: "sc7500" <sc7500 at sonic.net>
To: <diy_efi at diy-efi.org>
Sent: Friday, April 08, 2005 8:52 PM
Subject: Re: [Diy_efi] Exhaust gas temp


> I posted this with the hope/intent on getting a comment primarily...
>
> >> <>- Normally aspirated engine @ 8.5:1 CR - 1050 - 1250? F *
> >> - Normally aspirated engine @ 11.5:1 CR - 1150 - 1550? F *
> >
> In lite of posting the exhaust temps noted above, do you then disagree
> with the statement noted below, from the link included?
>
> >> <>http://www.sdsefi.com/techegt.htm
> >>
> >> This from within the paragraph....
> >> "Raising the compression ratio with no other changes will drop the
> >> EGT at the same AFR."
> >>
> >> BTW, for others interested, the above link agrees with some findings
> >> that were noted earlier, from the elaborate scientific GAMI testing.
> >
> Interesting.  We used the old dyno at Huffaker's [Sears Point] and
> didn't see the operator do much more than compensate for ambient air
> conditions.
> Since GAMI has it all over me as far as high tech capability, I'll have
> to demur on this point - and say only that we got what we got.
>
> BTW, you haven't seen NUTHIN' until you try to compare flame front
> propagation before and after piston dome coating !!!
>
> >>....special thanks to Smokey Yunik for telling me about this back in
1979.
> >>
> >A few authors of article thot those holes were for the purpose of
> >viewing the exhaust flame color.   :D
> >
> I remember hearing about that little "disinformation effort" too.  In
> case members of our esteemed group haven't been blessed with owning a
> copy of Smoky's autobiography [Best Damn Garage In Town, Carbon
> Press], he reveals a ton of engine development secrets that I was sworn
> to uphold upon pain of death for many years. His widder {Margie} don't
> hold a grudge, I guess...
>
> Good research, Gary - keeps me on my toes !
> -- 
> B.T. Corneto