So what happens if the Cammer goes to the 7000RPM range?
-------------------------------------------
Steven St.Laurent
Test Engineer
Test Branch, GSD, MCTSSA
MARCORSYSCOM, USMC
760-725-2506 (DSN 365-2506)
Work:mailto:stlaurents@mctssa.usmc.mil
Home:mailto:saint1958@home.com
-----Original Message-----
From: Sevrence, Sean (S.J.) [mailto:ssevrenc@visteon.com]
Sent: Wednesday, December 20, 2000 9:52 AM
To: 'dakota-truck@BUFFNET.NET'
Subject: RE: DML: 4.7 Dyno Run - Matt
The running torque is found by the formula:
TQ = 5250 X HP / R.P.M.
When you solve for HP, you are correct with the formula: HP = TQ * RPM /
5250
Sean
'92 Sport 3.9L 5spd - 250,000mi!
'01 Slt+ 4.7L 5spd LSD!
-----Original Message-----
From: jon@dakota-truck.net [mailto:jon@dakota-truck.net]
Sent: Wednesday, December 20, 2000 12:00 PM
To: dakota-truck-moderator@twisted.twistedbits.net
Subject: Re: DML: 4.7 Dyno Run - Matt
willcoughlin@hotmail.com ("Will Coughlin") wrote in
<F198YphVtHeDoNhfhOe000050b8@hotmail.com>:
>I think if you see a dyno sheet and the tq/hp lines never cross,it is
>not really accurate.If it is measured correctly,the tq/hp lines will
>ALWAYS cross each other at 5250 rpm.I have seen this printed and spoken
>by engine builders and dyno test engineers.Just something to keep in
>mind,I could be wrong about this,just like anything else,but I am pretty
>sure about it.TTYL,
Yep, the reason is that a dyno doesn't actually measure horsepower; it
measures torque. Horsepower isn't really a "measurable" quantity; its
calculated from the torque and RPM. The formula is such that HP and torque
are
the same at 5250 RPM. I don't have the formula in front of me right now to
be
able to post it, but if you see it, its fairly apparent why this is the
case.
(I think its something like TQ * RPM / 5250...)
---Jon-
.---- Jon Steiger ----- jon@dakota-truck.net or jon@twistedbits.net ------. | Affiliations: AOPA, DoD, EAA, NMA, NRA, SPA, USUA; Rec & UL Pilot - SEL | | '92 Ram 150 4x4 V8, '96 Dakota V8, '96 Intruder 1400, '96 FireFly 447 | `------------------------------ http://www.cs.fredonia.edu/~stei0302/ ----'
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