Good question Bill..... the current answer is that the Peak Torque is the
same as the Peak HP.... right around 8300 rpm..... and the motor freely
spins above that number.... drops off about 35hp at 8700 rpm....
Were going back in the morning to work on the peak torque number.... it's
not real impressive right now.....
K
----- Original Message -----
From: "William T Smith" <WmTSmith@landracing.com>
To: "Keith Turk" <kturk@ala.net>
Cc: <land-speed@autox.team.net>
Sent: Sunday, June 24, 2001 7:25 PM
Subject: Re: Gear selection challange
> KT,
> What RPM peak Torque and how much
> how much peak Torque at max power
> With these two and your trans and RA ratios we can get
> this done and I bet it will not be in OD and I am just
> guessing ! wmts
>
>
>
> Quoting Keith Turk <kturk@ala.net>:
>
> > Thought I would share the joy's of running a 9" Vs a
> quick change....
> >
> > I have been waiting on a dyno sheet to start
> selecting the right gear for
> > speedweek..... keep in mind I have the axle's out and
> the Driveshaft out so
> > it's an easy time to swap them out.
> >
> > The motor makes it Peak power at 8300rpm ( correction
> from previous post )
> > So we are looking to spin it around 8600rpm or so....
> >
> > we have 3.25 gears as well as 3.07's..... and three
> sets of tires ranging
> > from 26" .... 27".... and 28"
> >
> > There are Two ways to play this game mathmatically...
> both of which are
> > accurate and can cross check each other.....
> >
> > 1. Finding MPH
> >
> > Rpm X tire height in Inches divided by 336...
> divided by the gear...
> >
> > for example.... 8500rpm X 26" = 221000 divided by 336
> = 657.73 divided by
> > 3.25 = 202mph then we could pitch the Overdrive
> into the fray by dividing
> > that 202mph by the .91 OD which would give us an
> output speed of 222.393
> > mph...... this just happens to be 3mph faster then
> the current record in
> > the
> > class.
> >
> > 2. Finding Rpm
> >
> > MPH X Gear ratio X 336 divided by tire hieght in
> inches
> >
> > for example.... 225mph X 3.25 X 336 = 245700 divided
> by 26" tire = 9450
> > rpm
> > Obviously a bit much till we X it by the OD of .91
> which is 9450 X .91 =
> > 8599.5 rpm
> >
> > So that gets you through the Gas record..... we want
> to consider the Fuel
> > record as well.... as that is where are best chances
> are with a Motor
> > designed to run on Nitrous Oxide. the record is
> 230mph in that class...
> >
> > Here is the challange ... come up with the best
> combinations and the
> > reason's why..... I think I have already decided how
> we are going to do it
> > and Beleive it or not the example I just gave isn't
> the best combination in
> > my Humble opinion..... thou it's not a bad choice....
> it just might not be
> > the BEST choice as there are other things to
> consider .... such as Drag
> > associated with running in OD and the Tire size/
> wheel bearing speed.
> >
> > I'll Give fella that comes up with the best choice a
> So-Al T-shirt...
> >
> > Keith
> >
> > ///
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