Keith,
I have had engines on dynos a few times. Much info can be gained in a
few pulls, but there is nothing like the "Great White Dyno" to give you
useful information for Bonneville. Even then conditions change hourly!
As for doing what the other guys have already determined to be "Gospel",
this will not likely give you an edge. I go by the proverb, "He who
walks on the beaten path leaves no tracks". I am a firm believer that
each motor has its own personality, so many elements come into play when
tuning an engine. At one time we ran 52 degrees BTC in our 302 at
Bonneville, it would not perform with less, but that would certainly
kill the motor we run today.
There are many theories, but we live in the real world! Good Luck!!!
Tom, Redding CA - #216 D/CC
Keith Turk wrote:
>
> Figures you would think like a Dang Rocket Scientist.... But I agree Mayf...
> you wouldn't get some of this on a Dyno especially a chassis Dyno with all
> of the Car Variables thrown in... and I don't have Ten motors to Pitch at
> one of these things... One of the biggest underlying considerations is that
> the fella's that own this thing JUST got it and have about as much
> experience as I do on one... in other words Zip.... but they have the device
> and are willing to Play with my Junk....
>
> The question is really what would be the Most effective use of How Many
> Pulls... in other words since we don't have ten motors... what Information
> could we Gain from say 3 Pulls... 5 Pulls .... 7 Pulls and what are the most
> Critical things to learn... Brad and I have been talking about what
> information we would like to have and what we could get out of using the
> Dyno.... When you run the car on a Track the Variables are even Larger so
> the Dyno Makes sense for some of the little questions in life .... like Cam
> Timing and Ignition Timing... or do you bother with that? or do you Just
> come up with the notes from Guys who have done this a Million times and
> accept the fact that at 7200 Rpm a Small Block Chevrolet likes 36 degrees of
> Timing Best?
>
> Interesting thoughts.... Keith
> ----- Original Message -----
> From: Lawrence E. & Cathy R. Mayfield <lemay@hiwaay.net>
> To: <V4GR@aol.com>; <kturk@ala.net>; <land-speed@autox.team.net>
> Sent: Tuesday, April 25, 2000 5:28 PM
> Subject: Re: Dyno Questions
>
> > I am curious also. But is it measureable? Most instrumentations systems
> > have a certain resolution and accuracy. I suspect that dynos are sort of
> > calibrated at the factory then never checked again. I would bet a dime to
> a
> > donut that two consective runs of exactly the same configuration does not
> > give exactly the same results! Too many factorys to consider. Would have
> to
> > do a multi variate analysis on many runs to come up wit the answer, me
> > thinks. But anyway I sure would like to see the data.
> >
> > mayf
> >
> > At 05:43 PM 4/25/00 EDT, V4GR@aol.com wrote:
> > >I'll give it a shot, but I don't really expect much with these new killer
> > >ignitions. With a .045 gap and long flame I expect your lighting the fire
> > >either way. We'll see. Rich
> > >
> > >
> >
> >
> >
> > L.E. Mayfield
> > 124 Maximillion Drive
> > Madison, Al. 35758-8171
> > ph: 1-256-837-1051
> >
> > http://home.hiwaay.net/~lemay
> >
> > lemay@hiwaay.net
> >
> > Sunbeam Tiger, B9471136
> > Sunbeam Alpine Bonneville Land Speed Racer,
> > '66 Hydroplane Drag Boat (390 FE)
> >
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