Take your rear wheel HP, 192.8 / .80 = HP at the Flywheel for auto (+ or -
5 hp).. so 241 (11 HP over stock with Jet, Cat back, headers, pulleys and
Quick
D TB from the way I read it) From there you got up to 205.3, or 256.6 hp
at the crank
which translates into 26.6 over stock (and is right on the money for the
mods you
have done). Your torque reading is kinda low of 265 ft. lbs. but that's the
shorty
headers for ya. If you went with Doug Thorley (Mopar Performance) you'd
gain
another 15 ft. lbs. and maybe 3-5 more HP.
Rule of thumb with auto : RWHP / .80 = HP at Flywheel
HP at flywheel * .80 = RWHP
Use .82 for 5 speed.
Sam '00 RT (226 hp & 320 ft.lbs.)
> -----Original Message-----
> From: owner-dakota-truck@buffnet.net
> [mailto:owner-dakota-truck@buffnet.net]On Behalf Of Neal Arita
> Sent: Wednesday, February 23, 2000 5:15 PM
> To: 'Dakota Mailing List'
> Subject: DML: Dyno Result Info
>
>
> For anyone interested...
> This data is from my Dyno test today (glad it was higher than my IQ)...
> I have also compared stock filter box w/ K&N, Cone Filter, and
> 10" FABM.
> a) Stock Air Box w/ K&N Flat Filter: 199.6 RWHP / 262 ft-Lbs torque
> b) K&N Cone (with stock Air Hat): 204.8 RWHP / 264 ft-lbs torque
> c) 10" Round K&N FABM: 205.3 RWHP / 265 ft-lbs torque
> Although b) and c) were close there was about a 3HP difference spread
> through all the gears except at "peak" in 3rd Gear.
>
> Engine mods include Jet Stage II, Gibson Single Cat-Back, Gibson Shorty
> Headers, Jet Underdrive Pulley Set (3), Quick D TB, MSD 8.5mm Wires.
>
> A Previous Dyno did not include TB, Headers and Pulley. I got 192.8
> RWHP
> and 254 ft-lbs torque(w/ 10" Round FABM). That means I gained only
> 12.5 HP with TB, Headers and Pulleys!
>
> I was hoping for 210 RWHP - but I'm happy with what I got (add back 25%
> drivetrain loss - automatic - and I get around 256.6 HP).
>
> Wait...I think I confused myself on calculating RWHP, here's why...
> If I start with 230 Engine HP, a 25% loss will result in 230 * .75 =
> 172.5
> OK, now take the 172.5 adding back 25% will not get me back to 230:
> 172.5 * 1.25 = 215.625. I will need to take 172.5 and divide by .75,
> then
> I will get my Engine HP - Right??
>
> If this is true, then recalculations result in 273.7 Engine HP - I like
> that better!!
> Thank you all DML'ers - I appreciate all the information and help.
>
> Neal Arita - from Hawaii
> '97 CC, 5.2L, Auto
>
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