At 08:13 AM 7/15/99 -0400, you wrote:
>> -----Original Message-----
>> From: owner-dakota-truck@buffnet4.buffnet.net
>> [mailto:owner-dakota-truck@buffnet4.buffnet.net]On Behalf Of Jon Steiger
>> Sent: Thursday, July 15, 1999 1:46 AM
>> To: Dakota Mailing List
>> Subject: DML: Yet another Carlisle post :-)
>
>...
>
>> One thing that seems strange to me is the shape of the hp and torque
>> curves; if you can call 'em curves... HP just goes up in a straight
>> line and just starts to peak and go over the top of the hill where
>> I had the guy shut it down (around 5300rpm). The torque just sort've
>> goes straight across; goes up a little, drops down a little, and then
>> just goes straight across the page. Not much of a curve to either of 'em.
>> (Anyone know if that's good or bad?)
>
>I thought your nice, flat torque curve looked great. It shows you're
>developing more force to propel the truck forward at lower RPMs. With
>little rice burner engines, you have to wind them up to about 8000 RPMs
>before you go anywhere. Might work fine for a sustained race on a twisty
>track where you can keep it above 6000 RPM for the whole race, but since you
>start from a standstill on a dragstrip I think the flat torque curve is a
>good thing.
>
>A small high-RPM engine might have the same HP peak, but it would have a
>sharper slope and would have less power at lower RPMs. Since you do have to
>spend time at RPMs less than redline, the power there does matter.
>
>If I remember my physics, the work done toward acceleration (increasing
>kinetic energy) would be the integral under the power curve, across the RPM
>range that you're using. No, wait, I think it would be power over time. So
>more power at low RPM will help push the truck faster and climb up to the
>higher RPM even faster. I think...
>
>The August Car & Driver has a little blurb about horsepower:
>
>"In simple terms, horsepower is a multiple of torque and engine rpm. In
>other words, horsepower is the *rate* at which torque is applied to the
>crankshaft. Want to increase horsepower? You can do it by increasing
>torque or by increasing engine rpm."
>
>Sort of makes sense of the constant slope on your HP curve.
>
>(It's too early for this... :-)
Jason
I just read your post and I have one question ... have you recovered
from the C@C return trip yet?
Jon
So that's how you're able to run a 14.55 ... a torque curve that
comes on early and virtually never falls off. Now, the question is ...
how did you do that? ... or, more precisely, what were the legal mods
and what were the 'cross the edge' mods?
BTW, I got the tranny work done Monday ... transgo kit using the largest
hole option and some mysterious magic from a tranny guy that has
the reputation as being the best tranny guy in Burlington. I have not
really noticed firm shifts in normal street driving (that's ok with me)
but, from watching the tach during automatic shifts, it sure drops rpms
and bounces back up a lot faster. I just need a fairly cool and dry day.
Hopefully, the last Sunday of this month. I should be able to get in
4 test days before the Mopar Challenge @ Cayuga on Sept. 12.
Have fun at the Mopar Nats.
Bob
Burlington, Ontario
'97 CC Sport, 5.2L, 3.55, auto., 4x2, flame red
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