I will make a small wager that if for the most part if you set the
timing to something realistic rather 48 degrees and don't lean it out
when the egt's are high and use something that will measure the air fuel
ratio accurately starting with jets and nozzles that are in the ball
park that there are very few people that need any of this.... from most
of the stories i have heard on this list anyone with a burned piston
probably deserved it in the first place and certainly were not pushing
the envelope of engineering in any shape or form....... as far as knock
sensor triggering at high rpm or due to something that has nothing to do
with knock, been there done that a complete waste of time! Money could
be better spent by having Kinsler flow the injection or buying a carb
that is right to begin with or maybe even doing a little basic
engineering on the car to prevent 99% of all the burned up engines..
Dahlgren
John Beckett wrote:
>
> Greg
>
> Neat stuff. Great info.
> A set of pistons, rings and a cylinder sleeve, however, are still cheaper
> than the $30,000 for the super duper ignition system. The price will come
> down with time, and other systems will get better too.
>
> John Beckett, LSR #79, E/FCC
>
> ----- Original Message -----
> From: "Hyatt Engineering Ltd." <Hyatt-Engineering-Ltd@fuse.net>
> To: "John Beckett" <landspeedracer@email.msn.com>; <ARDUNDOUG@aol.com>;
> <land-speed@autox.team.net>
> Sent: Sunday, August 06, 2000 1:22 PM
> Subject: Re: MSD Detonation Detector and Cockpit Display Meter
>
> > I was just at the "Engine Expo 2000" in Hamburg and learned a little more
> > about knock detection, so I need to clarify some miss-information I
> > previously supplied.
> > The problem with knock detection on racing engines apparently is not
> > primarily due to the less than optimum selection and calibration of
> > accelerometers as I previously reported. Even ideal accelerometers are
> > problematic at high RPM as the normal mechanical noise in the engine
> starts
> > to fall into the same frequency spectrum as the knock, so the system
> cannot
> > differentiate between the two. If the system mistakes normal high rpm
> engine
> > noise for knock it will unnecessarily retard the spark and steal HP.
> > Most engines tend to knock more around the peak in the torque curve than
> at
> > max RPM though, so the things should work OK through the "normal" RPM
> range
> > as long as they are suppressed at high speed.
> > If the knock detection does not work at typical engine speeds (even with
> > nitro or nitrous) than there is a problem with the accelerometer or
> > software.
> > There is an ignition system available that can sense the changes in
> > ionization across the gap of the spark plug during detonation. In this way
> > it can detect knock even at high rpm. The system even looks at each plug
> > independently and automatically maps the optimal timing for each cylinder
> .
> > Unfortunately the system is $30,000 per engine. Their only customers have
> > been F1, not even the CART or NASCAR crews can afford them.
> > If anyone has 30 grand burning a hole in their pocket I can forward the
> > source of the system to you !
> > Greg
> > ----- Original Message -----
> > From: "John Beckett" <landspeedracer@email.msn.com>
> > To: <ARDUNDOUG@aol.com>; <land-speed@autox.team.net>
> > Sent: Thursday, June 01, 2000 8:21 PM
> > Subject: Re: MSD Detonation Detector and Cockpit Display Meter
> >
> >
> > > Doug
> > >
> > > >From what little I know about these things they work great on street
> > > cars...are marginal on race cars...and I would guess about useless with
> > > nitro.
> > >
> > > John Beckett, LSR #79
> > >
> > > ----- Original Message -----
> > > From: <ARDUNDOUG@aol.com>
> > > To: <land-speed@autox.team.net>
> > > Sent: Thursday, June 01, 2000 3:55 PM
> > > Subject: MSD Detonation Detector and Cockpit Display Meter
> > >
> > >
> > > > Group,
> > > > Has any body out there used the MSD detonation sensor on nitro
> that
> > > has a
> > > > readout in the cockpit for the driver to see. Chuck Salmen has one on
> > his
> > > > $um-Fun gas roadster and he likes it. What I don't know is how they
> > would
> > > > react to nitro which is on the verge of detonating at all times.
> > > > Anybody had any experience?...............................Doug
> King
> > >
> > >
> > >
> >
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