Took a friend's truck to the dyno today. He put down 310 horsepower and 347 lb/ft of torque. I'm not sure on the RPM, because the guy that printed our graphs didn't include them. I also think there is more in the truck as we cut each run off before 6200. The air/fuel ratio on the run was approximately 12.5:1. Mods are as follows:

Magnaflow muffler
Jantzer throttle body
Yank TT3000 stall
219/222 cam (918 springs, TR pushrods, Rollmaster chain)
LS1 Edit tuning
ASP crank pulley
Stock manifolds!
Stock intake!

 

What motor is in that truck. I'm thinking it must be a 6.0L.

 

Thats some awesome peak torque. And like badmofo, is this a 6?

congrats to your buddy.

 

must be something special in there for those numbers.

 

The motor is a 5.3. I was highly surprised at the numbers, we have 4 pulls of similar numbers, except for one where the converter spiked. All runs were done in 2nd gear. The dyno was done at AVC in Montgomery, AL. The guy running the dyno said that a new Harley Davidson F150 that had just dynoed put down 335 horsepower. I don't know how that compares to other HD F150s, so the dyno might read higher than the norm.

 

even if its reading higher, the torque numbers when compared to hp will look awesome.


on that same dyno, you could possibly see 330hp, 360tq with LT's

****, stock Air intake also... strong pullin motor

 

It sounds like the converter was unlocked, right?

 

Yes, the converter was unlocked. The converter flashed one time and we hit 649 lbs. of torque.

 

Wow..

That's sweet. I think the numbers would be more inline if it was locked - but those are nice and healthy for a 5.3. Congrats!