final figures after add ons!!!

[superdave]

here are the figures you have asked me for... 99 1 ton cummins auto with 3. 55 rear end... . had tested on a mustang dyno by cummins trained folks with cummins diagnostics... not DC... . stock run showed... HP at the wheels, 192. 0 at 78. 0 MPH... 949. 0 torque at 33 MPH... . after adding banks 4 inch exhaust system, banks gauges, tansmission pressure lok, EZ box and K&N filter the same dyno showed the following... ... 202. 9 HP at the wheels and 1080. 3 max torque at 22. 0 MPH..... seems to me that all the ads i see in all the magazines are very far from actual performance enhancement figures... . K&N says in their ad "plus 10 or more HP", banks exhaust says "Increase HP"... . EZ says from 20 to 60 HP increase... well i got 10 HP and over 200 torque... . have to say the truck feels stronger and runs stronger. . terrific increase in fuel mileage... . pulling a heavy load at 67 to 70 MPH have to run OUT of OD at 2800 RPM, EGT of 1100 to 1150,,,boost 18 to 20 and transmission temp 160 to 170... . put that sucker in cruise and hummed right along... after all the advice you guys gave me before i bought this stuff, do you think i am right on target????thanks to all of you... . by the way, the roar of the banks exhaust system under load is considerable... shuts my hearing aids off.

 

[Bob Wagner]

you must be getting slippage

 

[Hammer]

949 ft lbs of torque at 33 mph STOCK???,,You sure about that number???,,Seems a little high to me... .....

 

[DEZLPWR]

What Bob said....

Somethin' ain't right there.....

 

[MikeR]

Your torque numbers are way off. The stock hp numbers are right (192), but I sure don't think those guys knew what they were doing with a pickup truck on the Mustang. First off, there is no way a stock trans will transfer 900 lbs-ft of torque. There's a bit of info on vehicle specs that need to be entered correctly in the dyno computer, or the numbers get way off.

 

[RustyJC]

Originally posted by Hammer

949 ft lbs of torque at 33 mph STOCK???,,You sure about that number???,,Seems a little high to me... .....

Measured at the rear wheels, so it probably represents engine torque x transmission gear multiplication (if not in direct) x rear axle gear multiplication / (tire radius in inches/12) - transmission slip - other drivetrain losses - rear wheel-to-roller slip. Torque at the rear wheels has to be corrected to get back to engine flywheel torque, if the dynamometer isn't doing this by comparing engine RPM with roller RPM and doing the math before presenting the results.



Rusty

 

[superdave]

i am not a mechanic... slippage where??? i am looking at the torque and hp curve on the print out sheet. . i kinda think these guys know their stuff... looking at the chart for the stock curve, looks like the torque spike was just before the first transmission shift spike... after that hp was pretty steady and the torque curve came on down... after the additions, the torque peak was quite a bit before the first transmission shift and then dropped and then peaked almost as high again after first shift then gradually down peaking a little at each shift... i am just reading off the mustang dynamometer print out they gave me. . they indicated this was about normal... i asked why i did not get 30 or 40 or 50 more hp and they were, i thought ,pretty up front... "they sell and install many different products but make no guarantees as to what the end results will be in comparison to what the advertising may say. "... i have no problem asking them more questions if you guys will tell me what you think so i can ask it in a semi-knowledgeable way... thanks again for all your input

 

[KatDiesel]

Um, they dynoed it while it was shifting through the gears?



And as I said before in the other thread, I am sure you got your 50 to 60hp gain, however its down low not peak power gain.



Might wanna rethink your statement bout "these guys know what their doing"... .

 

[Don M]

HP= Torque * rpm/5252



Torque= HP * 5252/rpm

The dyno you were using is better suited for trouble shooting and road test simulations.

Cummins uses this type of testing when diagnosing problems.



The Edze EZ adds much more power than the shown 20 or so.



Larger exhaust was shown to add about 12 HP in a certain rpm range and closer to 2 at max power.



Don~