Dyno graph of sts vs stock

[bud8fan]

look at the dyno run at the top of the thread,,,it has stock hp of 220 at the wheels...dont know chevy's rated hp for the 2000 x 6.0...

[WHT6.0HD]

ya it was the 220 that suprised me. I thought factory HP was around 285 at the flywheel for that year. it seems your losing quite a bit of HP through the drive train.

I need to put mine on the dyno to see what the real # are

Jeff

[vv8]

well you guys you have to realize that this dyno is not like the other dynos out there that just free spin the rear wheels so yes his numbers are lower but very close to stock 6.0L . and you also lose 80 hp with the 4l80 trans compared to the 22hp from the 4l60 later, kevin

[WHT6.0HD]

That is amazing to lose that much HP through the drive train. So if I have 300 HP to start with and about 50 HP in mods, I could only have 270 HP at the rear wheels. No wonder it wont spin the tires!!!

What is it about the 4l80e that causes such a loss

Jeff

[bud8fan]

its because the 4l80e and the rear ends are so big and are made for heavy duty usage.

[jerry2500]

Big tranny and rearend kind of bogs it down but i solved that problem.....Turbo

[8budfan]

you definetly did that jerry

[ONE04FX4]

yay and i am fixin to be losing some power as well. as soon as i do the 4l80e swap i will have to see where i satnd. i might have to up tha shot a little. i will bne going with a 2800 stall instead of a 2500. i might get lucky and even out with a 175 shot instaed of a 150 shot.

[wkdivr]

I suppose that's the base STS kit, with just the Nelson tune? Right? Don't know if it matters, but did you pick up any mileage with that setup. The article in Sport Truck picked up quite a bit with the base kit, with no engine management tune up.

[jerry2500]

Originally posted by wkdivr@Oct 3 2004, 08:14 AM
I suppose that's the base STS kit, with just the Nelson tune? Right? Don't know if it matters, but did you pick up any mileage with that setup. The article in Sport Truck picked up quite a bit with the base kit, with no engine management tune up.

Yes, 2 mpg city and highway and 3.5 mpg towing an 8500# camper.