Ok, so I did mean to hassle you...I admit it. Much like the old muscle cars of the late 60s/ early 70s, all horsepower was measured at the flywheel, and didn't account for any powertrain losses. Modern day HP is listed as BHP, measured at the brakes. I wonder what the '97 Dak is listed as, BHP or flywheel HP? Mine is 'rated' at 230 / 300, and I'm wondering how close that is. Wait 'til I get my Nerf Bars installed, along with a tool-box on the back and maybe a grill guard (Not Mopar's though), boy, that'll really boost the HP numbers!
Pat Buthmann
-----Original Message-----
From: Michael Clark [SMTP:mike@snakebite.com]
Sent: Thursday, June 19, 1997 3:26 AM
To: dakota@ait.fredonia.edu
Subject: Re: Dyno graphs
Pat Buthmann wrote:
> Geez Mike, don't mean to hassle ya, but the dyno graphs claim 211 HP peak and 264 ft/lbs peak
> torque. Yet, on the image of your engine bay, you claim 254 HP and 321 ft/lbs of torque....:P.
> Hmmm, that must have been one of Meldrum's Butt-Dyno tests. <GRIN>
>
> Pat Buthmann
What do you mean "don't mean to hassle ya,"? Sure you do. Yeah, yeah,
I get it, poke fun at Mike time... That's ok guys I can take it! Just
remember Pat, pay-backs are hell, I'll be reading your posts carefully
from now on... :-) I guess it is my Summit Racing decal on the back
window that's making all that extra horsepower, that sucker really makes
it scoot. That and my chrome valve stems...
Seriously, here's the deal. The pic of the engine bay that has hp
numbers were what I estimated months ago when the only mod I had was the
computer. Factory specs for '93: 230hp 285ft/lbs and the computer
claims to add 24hp and 26ft/lbs so I just added that, but I did goof on
the torque I started with 295 instead of 285. And these are flywheel
numbers not rear wheel numbers.
Later I added the FIPK which claims 18hp on a 5.2L Ram. I don't think
that number is realistic but it did make a big difference, especially in
torque. Before the dyno I had estimated my numbers to be 260hp and
321ft/lbs just by adding up conservative numbers for the mods. Turns
out I was pretty close. The guy at the dyno shop said a dead on way to
calculate flywheel numbers are to divide rearwheel results by 0.82.
They do a lot of work on Impala SS's and he said that calculation works
out perfect, and even though the Dak has a different tranny and
underhood components that number should still be really close. So that
would work out to 257hp and 322ft/lbs. So it turns out I was 3hp and
1ft/lbs off on my estimate! I guess my butt-dyno is pretty dead on...
I had been thinking of removing the hp numbers on that pic so people
would not get confused, or at least saying rear wheel numbers. I think
I might do that now.
Take care Pat!........
-- Michael Clark mike@snakebite.com 93 Mark III 4X2 reg. cab SWB Pat:1 Mike:0 V8 auto MP SBEC K&N FIPK
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