Keith Turk wrote:
The short story is EGT may tell you something about mixture
but less than a lambda sensor will, at least a good 5 or 6
wire one. EGT will tell a lot about ignition timing too.
More later if anyone is interested in what i have to say. I
have been burried at work here..
Dave
> Amazed Dave hasn't jumped on this one.... Spark plugs are okay for tuning
> information but NOTHING like a real printout from a decent computer.... I
> have seen several of these and understand the concept but with my budget the
> best I could do was a Dual EGT gage from Auto meter that monitors the
> highest and recalls both high reading's at the end of a run.... ( then I
> have to remember to clear them before the next one )
>
> it's a great tool for tuning not a data logger but it's been a wonderful
> toy...
>
> I put the probes on the 1 & 2 tubes cause that was what I thought made
> sense.... to be honest I don't think it makes much difference.... what is
> important is the differeneces when you run .... from your established
> baseline.... each one of these things is going to be just a tick different
> simply as a matter of where they are installed... so your baseline tuning
> should allow you to know what is too hot.....
>
> Dave made a great point a while back about keeping the Probe VERY close to
> the outlet to read REAL egt rather then a cooled down number that results
> from the headers cooling the charge...
>
> The Archives should have some great info on this subject... check out
> www.listquest.com under land speed racing....
>
> Keith
> ----- Original Message -----
> From: <ardunbill@webtv.net>
> To: <land-speed@autox.team.net>
> Sent: Wednesday, April 04, 2001 7:26 AM
> Subject: EGT
>
> > Hi Folks, last time I had a ride in a Beechcraft Bonanza I noticed the
> > owner had installed an EGT display which continuously monitored each of
> > the six cylinders.
> >
> > Just talking theoretically, each cylinder on a V-8 is bound to have a
> > different EGT, so for tuning purposes it would seem you need a computer
> > to record all cylinders during a run so that you
> > can make changes later accordingly. I gather people do that changing
> > nozzles for each cylinder with mechanical fuel injection, and with EFI I
> > suppose each cylinder can be individually managed with the computer.
> >
> > Tom already told us he changes bypass jets at Bonneville during a run if
> > his EGT so indicates. I imagine if the EGT is high it means a lean
> > condition and the engine wants more fuel. As John just pointed out,
> > there's not time to do anything but shift gears and steer at Maxton.
> >
> > Cheers from Ardun Bill
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