2002 F250 PSD dyno results
#1
05-11-2002, 05:30 PM
Join Date: May 2000
Location: Pittsburgh PA USA
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2002 F250 PSD dyno results
I put my 2002 PSD 4X4 automatic on a Dynojet 248C chassis dyno today. My car has the AFE air box,
4 inch downpipe back Dynomax exhaust, and the Superchips Microtuner. I buy most of my parts off
of Mike Troyer@ Performance Products
The horsepower numbers were very much pleasing, but the torque numbers were way off. However, the difference between stock and SCMT programs were
very good. I don't think the truck was calibrated correctly thru dynojet.
The chassis operator started out at 1500 rpms when the converter was locked and let it fly for
each pass. Anyway. We did back to back, tests for each change. We dynoed with the stock program
setting, and with the 80 hp offroad Superchips setting on the SCMT.
Heres the results
Stock factory program
197.4 hp (Peak power was at 2800-3000 rpms)
367.8 torque (peak torque was at 2600 rpms)
SCMT 80 offroad program
264 hp (Peak power was at 2800-3000 rpms)
475 torque (Peak torque was at 2600 rpms)
Excellent increase in horsepower and torque.
Thats an increase of 67 rwhp and 108 pounds of torque but I don't understand why the torque
numbers are so low other than the operator didnt start the runs at a lower rpm and flash the torque converter.
Seems like the hp numbers are pretty much on the money. But the torque numbers are about 125-150 pounds less than I expected all across the board.
4 inch downpipe back Dynomax exhaust, and the Superchips Microtuner. I buy most of my parts off
of Mike Troyer@ Performance Products
The horsepower numbers were very much pleasing, but the torque numbers were way off. However, the difference between stock and SCMT programs were
very good. I don't think the truck was calibrated correctly thru dynojet.
The chassis operator started out at 1500 rpms when the converter was locked and let it fly for
each pass. Anyway. We did back to back, tests for each change. We dynoed with the stock program
setting, and with the 80 hp offroad Superchips setting on the SCMT.
Heres the results
Stock factory program
197.4 hp (Peak power was at 2800-3000 rpms)
367.8 torque (peak torque was at 2600 rpms)
SCMT 80 offroad program
264 hp (Peak power was at 2800-3000 rpms)
475 torque (Peak torque was at 2600 rpms)
Excellent increase in horsepower and torque.
Thats an increase of 67 rwhp and 108 pounds of torque but I don't understand why the torque
numbers are so low other than the operator didnt start the runs at a lower rpm and flash the torque converter.
Seems like the hp numbers are pretty much on the money. But the torque numbers are about 125-150 pounds less than I expected all across the board.
#5
05-16-2002, 08:02 PM
Former Sponsor
Hi Dave,
Thanks for your post!
I haven't dropped by here in awhile, but I saw your post & just wanted to drop you a quick note to say hello & thanks, as well as agreeing with you about the total torque number, as we discussed in the other thread.
Also, in the other thread, I forgot to respond to something you mentioned over there, about doing the downtube for the power gain and not for the lower EGT's. Sure, you can do that, and no doubt you'll pick up some more power. More power, yes, but I don't think you're going to see 25-30 more HP from the larger downtube in this situation, with the intake & exhaust mods you have already done.
If you do that and dyno the result, I'd love to see that data, it would be interesting to see just what you do pick up by doing that over your current configuration.
Good luck!
Thanks for your post!
I haven't dropped by here in awhile, but I saw your post & just wanted to drop you a quick note to say hello & thanks, as well as agreeing with you about the total torque number, as we discussed in the other thread.
Also, in the other thread, I forgot to respond to something you mentioned over there, about doing the downtube for the power gain and not for the lower EGT's. Sure, you can do that, and no doubt you'll pick up some more power. More power, yes, but I don't think you're going to see 25-30 more HP from the larger downtube in this situation, with the intake & exhaust mods you have already done.
If you do that and dyno the result, I'd love to see that data, it would be interesting to see just what you do pick up by doing that over your current configuration.
Good luck!