dyno numbers

[Jim P]

I took my truck to our local dragstrip today and ran it on a Mustang Dynamometer. I am not sure how accurate it is but I know I was a little disappointed.

The maximun hp at the wheels was 203.5 @3250 rpm.

The maximum torque was 363.2 @ 2500 rpm.

This dyno has a 2000 lb wieght that spins and also has a unit that looks like generator and uses eddy currents to apply the load. The run was started in forth gear, idling and then I put it to the floor. The rpms then climbed to 3700 at which time I let off on it. It seems that the torque would be higher if the load was started at 3700 and then the dyno would drag the engine down. I know most diesels have maximum torque around 1800 rpms but my truck did not start to build boost until around 1800 rpm.

[rjschoolcraft]

Did you get to compare runs with and without the water in your intercooler?

200+ hp at the wheels is not bad, considering your truck was rated at 190 at the flywheel when new...

[Jim P]

I wish I could have run with and without the water but it cost 55.00 for one pull or 80.00 for three and me being the cheap a$$ that I am, did not want to spring for the extra money. My cousin that told me about the dyno, said it was only 10.00 per pull but I guess he was wrong.

I don't understand why my torque numbers are so low. Ron, my hp number was close to yours but my torque numbers really suck. Do you have any ideas why my torque would be so low?

[rjschoolcraft]

I've heard that Mustang dyno's are not very good indicators.

[Jim P]

The chip I am running is one that I bought second hand. I beleive it is a BD chip but I am not positive about that. I am thinking about getting a new chip from Kennedy.

[rjschoolcraft]

You won't be disappointed.

[Jim P]

Now that I have thought about it more, I believe the chip I am running is a Z industies. At any rate, the chip is old and definitely don't have the latest programming.

[eracers999]

Kennedys big chip, ooh yea baby..