Don't be too hard on John and Keith. Being one that has burned &
detonated lots of pistons, I have this to say...I know that I can run
safe and always be an also ran, or I can push the envelope, experiment,
go into uncharted waters and possibly get the edge. I know the price and
I am willing to pay! Although preparation and caution are good words,
all the prep in the world does not insure problem free runs.
Nitrous is a dangerous game and the learning curve is steep. Until you
find your limits problems will occur, but personally, I think it is
worth it.
Tom, Redding CA - #216 D/GCC
dahlgren wrote:
>
> 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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