What's My HP / TQ #
 

Any one have an idea how much HP & TQ my truck should have with the mods in my signature?

The reason I'm asking is I had my truck smog checked today, and the place I took it to back the truck up to a set of rollers hooks up the smog checking stuff, and then lights her up while I'm watching the computer checking the HP/TQ numers since this is the first time I have ever had my truck on a dyno.

Any way the numbers ran any where from 260hp / 600tq al the way up to 300hp & the 700 hundy range for TQ. Now I know my truck can't do 300, but would like to here from the experts on what you think just to give me an idea. It was kinda hard to wathc the number since they where bouncing up & down.

The guy said it was a Mustang Dyno? and he ran the tuck with the OD off and in order to smog the truck he ran the truck to at least 60mph & 3k rpm.

Thanks now I need to go give the DMV my $247.00 for my new tag's.

You need to go back and ask if the computer read out was indicating uncorrected RWHP=Rear Wheel Horse Power and RWT=Rear Wheel Torque, ft lb, or was using a standard correction factor for drive line loss and indicating estimated engine HP at the fly wheel. You also need to know the actual ambient air temp and pressure at the time the dyno run was made. Those corrections are usually made after the fact, and the dyno indicates the RWHP and RWT which would be seen under standard conditions which I think are 60 F and 14.7 psi. If he ran at WOT at 2800 to 3000 rpm, you might expect something like 275-280 HP and 650-675 ft lb at the rear wheels in the 60 tow setting, but you might need to correct these for actual conditions.

To get real technical about it, youre probably making 275hp and around 625 pound-feet of torque at the wheels.

If I was to guess, I would say 285 and 600. This due to what Ernest mentioned.

Wow I did not think it would be that high. Any way thanks

Keep in mind that whatever your numbers are for HP and torque, they depend on the ambient air temp and pressure! If you dyno on a hot day at altitude you'll see substantially less than on a cold day at sea level. You might have been given numbers for a "standard day", and in Denver on a hot day you'll produce much less actual HP, for the same reason that airplanes can't take off there on a hot day with a full load of fuel! Not enough lift because of a double whammy of hot air temps and high altitude!