VikingDiesel

well, there was a free dyno day this morning at a performance shop about an hour south of me which is totally worth it considering the diesel performance shop wants $125 for 2 pulls. Well, we had to do it a few different times to figure out exactly how to dyno it b/c its an auto and the shop said they have done only a few diesels in the past. EDGE set a 5 and we tried a few different rolls and the best ive gotten was 330 RWHP / 737 RWTQ. There was definetly some wheel hop which my guess was probably my mud tires (which I cant stand anymore). Do those number seems right? O/D was turned on.

95ram

You're luck you still have lugs on your tires. Those type of rollers are notorious for chewing up mud tires. That's probably what your "wheel hop" was from. IMO the numbers look a little low. That's only 60 rwhp more than then I dyno'd stock.

VikingDiesel

I think the torque numbers looks good but the HP does look a little. Could it be the wheel hop? so Mud tires are horrible on the dyno? Just just regular all-terrain are fine?

dodgezilla04

i dont experience any wheel hop with my mud terrains. i have made 6 pulls with them on 2 different occasions. maybe the didnt have you straightened out and strapped down tight enough? when they place you on the rollers, did the pull her in gear and gently spin the rollers without being strapped on? that aligns the truck to the rollers.

VikingDiesel

yea, it was not strapped properly b/c none of those things procedures were done. What are people dynoing with the same mods?

dodgezilla04

that explains your wheel hop, the truck was trying to drive straight, and the straps were trying to keep it at the same angle as when it was loaded on the rollers. lucky you didnt get enough traction/have enough power to hop off.

with just the exhaust, intake, and juice, you are comfortably around 400, 875. careful on that tranny.

t-boe

I thought you were suppose to dyno with the OD off. That might give you false #'s.

VikingDiesel

really!?!?!?!?!?! I knew there was something wrong

swansong04

i ran the dyno yesterday at bd .. i ran 451.4 hp and 1059 ft pound of tq (approx) with my mods

Gary

dodgezilla04

good job swan.

viking, you'll want to dyno with od off, trans in 1:1 direct drive ratio(dont know which it is for the auto) and locked up on the convertor if you have a means of doing it. it is alittle trickier with an auto to correctly dyno.

VikingDiesel

so what should my numbers be then with my current setup at EDGE level on 5 and the BHAF and 4" straight pipe

dodgezilla04

around 375-400, and 850-875 I'd guess.

morkable

Last year at the NADP dyno day a truck just like yours, exact mods, ran a 421 HP. I dont remember the tq.

OD is fine as long as they run you from 50mph and up and it will stay in od. In my case I had to run in OD to get it to hook up. As for strapping that is the most important part of a dyno run, if you cant get the tires to hook up on the dyno you wont get hp showing up on the graph.

Oh and btw, when I was running a bd powerpup, stock exhaust, and K&N airfilter I ran 348 hp.

Kevin

N.Johnson

BD yesterday on my basic stock truck 272.1 HP 635.1 TQ. The TQ doesn't seem right? Any idea why? That's it can't take it anymore smarty on order!

blownsmoke2

When I was on a mustang dyno it chewed my tire up real bad,couldn't keep them from spinning. When you walked back into the room you could smell the rubber burning. Also I think alot of your numbers has to do with the way they have the dyno set up. Also I didn't think you were suppose to pull in overdrive neither due to false numbers. I know they custed mine every time it shifted into overdrive.