Engine/Transmission (1998.5 - 2002) Dyno Results

[Mingoglia]

Finally had my truck dyno'd. I'll scan the two sheets I have shortly for everyone to see. It was dyno'd on a Mustang Dynamometer.



Truck:

2001 3500 4X4 5sp ETC. Edge EZ. Boost Elbow. Running stock setting on the Edge EZ. 3. 55 axle. Put in a new lift pump about 4k mi ago. Completely stock other than EZ, including stock exhaust, and about 5k miles on a stock air filter. Truck has 44k miles on it. I live in Phoenix, AZ (around 1,850 ft elevation) and it was 98 degrees outside according to my truck's thermometer. It's been very dry out. Haven't received rain in a couple of months.



I have two sheets. I'm wondering if some of you dyno experts can tell me what's the difference between the two because when the guy was talking to me about it, I got inconsistant answers it seemed.



Here we go:



1st Sheet:

Max Power 217. 7 @2700 RPM

Max Torque 475. 6 @1800 RPM



2nd Sheet:

Max Power 217. 1 @ 65. 0 MPH

Max Torque 633. 6 @ 44. 0 MPH



According to the operator sheet one is the one I need to be concerned with. He said the other sheet (633. 6 tq) would be similiar to what a non-braking Dyno such as a Dynajet would show. He said the 475. 6 tq number is a reverse calculation of the horsepower times RPM calculation and is a true account of the power. Further more he said the 633. 6 number is the raw torque that my truck put on the rollers but doesn't take into account mechanical advantage. With this in mind, he kept referring to my truck as having a 3. 73 rear end and I kept correcting him by telling him I had a 3. 55. Do you think the 475. 6 tq number could of been calculated using a 3. 73 rear end and there fore this number is off? ... or does this sound correct?



He further said that in order to get the approximate crank hp/torque to divide the numbers by . 7 (he said . 7 is accurate for 4X4 trucks because of the extra drag of the transfer case). Using this formula, 217hp at the rear wheels converts to 310 crank hp. Does this sound about right? I know this number is an estimate.



BTW, if Keith at DD is reading this... I'm planning on having you guys install some DD2's (or 3's) and a SB clutch. What dyno do you use? I'd be curious to see what numbers I lay on your dyno compared to this one.



Mike

 

[Beast2B]

1) what is "stock" setting on EZ? boost fooler only?

2) i got 215hp from my 245hp rated HO at first dyno, i think . 8 is probably a closer factor for crankshaft horsepower.

3) have DD do before and after dyno runs to get a more accurate relationship between the parts added.



sounds like the dyno dude wasn't real clear on the results, makes you wonder if other parameters were input correct...

 

[cumminspwr01]

I am not a dyno guru by no means but I think the 475. 6 is a closer reading to your actual torque than the 633 number. These trucks usually have roughly twice the torque than horsepower. I think the equation we use here is HP * 5252 / RPM and that should put you real close to what you torque is at that rpm.

 

[Cummins4Life]

I did 223hp 485tq with an ez on a stock 01 auto.