I know there was a thread about it on here somewhere but can't seem to find it. But was wondering what the stock HP was for out trucks. I found the IH engine data tag on my valve cover it says 250 hp @ 2700 RPM. Is that correct? For some reason I thought it was more.

 

Thats prolly about right, my 03 when it was stock was 250hp with 525 of torque....

 

Not for the '99s. I think they were 235 or something like that. Look at the top of this forum. Right below where it says "Ford Truck Enthusiasts" there is a gray bar with "Articles/Specs" button. Click that and you can find your way to most truck specs for every year.

 

AAHAA, learn something everyday, thanks teacher Joe, lol...

 

I was curious, so I looked. There are no specs for the 99s for some reason, but if you look at the 2001, you notice it says "250 HP, 15 more than last year"...

The late 99 should be the same. I don't know what the early 99s were, but I'm pretty sure they were less than that even.

 

I keep this handy. Good info in this link. click here

 

My early 99 was 235 FWHP but most go by the HP that a dyno reading gives which I explain below for the 250 FWHP later trucks.

The dyno measures the HP that the tire treads apply to the dyno's rollers and there's typically about 5 HP dissipated in the flexible rear tires which are between the rear wheels and the dyno's rollers. Since the wheels have a solid connection to the axels I consider them to be one mechanical unit so that the RWHP is the same as the rear axel HP and by this definition the RWHP is about 5 HP more than what's measured at the dyno's rollers and then you add to the RWHP the HP that's dissipated in the diff, the drive shaft, and the tranny to get the FWHP.

According to some data I've seen a bone stock 99.5 truck applies about 210 HP to the dyno's rollers and this implies about a 215 RWHP and there's about 35 HP lost in the diff, the drive shaft, and the tranny which implies a 250 FWHP.

The above definition of RWHP is the same that CAT uses on their RV website in their graphs of hill climbing speed vs % grade for motorhomes where they subtract the rolling resistance HP that's dissipated in all of the tires from the RWHP to get the road HP which is the HP that's available to overcome aerodynamic drag and to propel a vehicle up a hill.

So for a rwd truck the road HP is equal to the dyno roller HP minus the rolling resistance HP that's dissipated in the front tires. If you dyno a 4wd truck on a special 4wd dyno that measures the HP that's applied by all the tires then the road HP is equal to the dyno roller HP.

 

Thanks for the replies. Mine must have said 235hp since I have a late 99. I was reading it upside down when replacing the donut gaskets.

 

250 is probably right, its just like the 01s. early 99s probably have 235 bc of smaller turbo and spyder and such

 

I have the book that came with my early 99 and it said 235hp @2700rpm and 500 lbs of ft.torque @1600rpm.This is out of the brochure printed 3/98.

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Ron
Early 99 F350 DWR
Used only in summer for 5th wheel 29.000 miles