Too bad all these old racers have forgotten more than I'll ever know.
We used EGT with an ITC Fiat and with F500s. Never ran it on the Corvette,
just watched the paint on the headers burn.
On the Fiat, with the sensor roughly 3 inches from the head in the header,
1475 degrees was about optimum at race RPMs.
It was used to tune so that each cylinder ran the same temperature, evening
power between them. This was done by drilling each tube and placing the
sensors in each one. It quickly shows in race conditions which cylinder is
lean compared to others.
In the F500s, the EGT was a dual gauge, so that you were constantly
monitoring both cylinders. You could see imbalance in power and adjust the
carbs accordingly.
1075 was cold, 1100 was very dependable but mid pack, 1150-1175 was good
power and not too destructive, and 1200 was a lot of power but a one weekend
motor. One owner I knew ran up to 1225 and more to get the power he needed
(to make up for his so-so driving) but that was a grenade engine, one race,
then blow.
YMMV
----- Original Message -----
From: "Rick Cook" <rccook16@voyager.net>
To: "'Paul Meis'" <pmeis@wfubmc.edu>; "'Vintage'"
<vintage-race@autox.team.net>; "list (E-mail)" <team-thicko@autox.team.net>;
"Usa@Se7ens. Net (E-mail)" <usa@se7ens.net>
Sent: Thursday, May 24, 2001 5:54 PM
Subject: RE: EGT measurements
> Thanks to all for the input. It seems that while the EGT gauge is not the
> end all, it can be used as a protection against too lean conditions and
this
> was my main concern. With the progressive nature of the Weber, it tends to
> lean out at high rpms and the gauge should show it. I do not want to pull
> the motor to go to a dyno. Thanks again.
>
> -----Original Message-----
> From: Paul Meis [mailto:pmeis@wfubmc.edu]
> Sent: Thursday, May 24, 2001 1:14 PM
> To: Rick Cook; Vintage
> Subject: Re: EGT measurements
>
>
> I have used EGT on a dual Weber equipped Honda S-800 and have found it
> helpful. If you have two Webers, you will need at least two sensors to
> evaluate the performance of a cylinder from both carbs. In general, the
idea
> seems to be to go for the highest temps and then back off one jet size to
> avoid a mixture too lean. On my engine, the temps I tried to get were
> 1200-1300 degrees. If you have access to a dyno, it may be worth the time
> and money to find your optimum range before going to the track.
> Paul Meis, 69 NTM-Honda D-sports
> ----------
> >From: "Rick Cook" <rccook16@voyager.net>
> >To: "Vintage Race Mailing List (E-mail)" <vintage-race@autox.team.net>,
> "Usa@Se7ens. Net (E-mail)" <usa@se7ens.net>
> >Subject: EGT measurements
> >Date: Thu, May 24, 2001, 10:22 AM
> >
>
> > Anyone have opinions as to advisability of installing exhaust gas temp
> gauge
> > to fine tune Webber carbs on a 1500 Ford in a Seven, used exclusively
for
> > racing? Due to my ignorance it seems I'm always guessing about jetting
at
> > the track. Any input is appreciated.
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