Yeah I am interested in hearing it.... I know my story on EGT's.... it's an
amazing deal when you see the gage spike past 1800 and don't give it a
second thought....
With the ERC A8C the fuel burned SO SLOW that it afterburned in the headers
and just became part of the drill there at the World of Speed.... watch the
Egt go to the Moon.... Hit the Nitrous and watch it Jump back down to
1300...( which is just a tick cool on my sensors ) and the Plugs showed a
Very safe tune up ( thanks Dave )
The VP C 16 we ran this weekend didn't have that as an issue... max EGT was
1475.... which is a tick hot but not unlivable.... ( I have had it up to
1575 on a long run and not touched the top of a piston ) I think we need to
move up one notch on the VP scale fuel wise to help this out a bit...
Best Egt's so far where with Torco 118 ... the Motor just seemed to like it.
Egt was between 1325-1375 everytime we ran it....
Timing was always at 38 degrees and we retarded it 2 degrees for every 50hp
of nitrous added.... those were always constant...
Keith
----- Original Message -----
From: "Dave Dahlgren" <ddahlgren@snet.net>
To: "Keith Turk" <kturk@ala.net>
Cc: <ardunbill@webtv.net>; <land-speed@autox.team.net>
Sent: Wednesday, April 04, 2001 8:15 AM
Subject: Re: EGT
>
>
> 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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