'03 HD tune gains What did you see?

[jethro_3]

My brother has an '03 HD and he just does not believe me when I tell him I can gaurentee him power, mpg and driveability if he gets the tune.

What are your experiences in a 6.0 HD?

THanks,
Jethro_3

[BLACKHD01]

I have had my tune in for about a month on my HD it's a 01 though, I can tell that there is a big difference in power and my gas mileage has increased. I was getting about 300 miles to a tank of gas and now I am getting about 325-350 a tank. Allen did the tune, pulleys, and 05 e-fans at the same time so there was a big difference all at once. I know that it dynoed 215-220 rwhp before we got started and on the last dyno pull with all mods we were at 240rwhp and that was with hardly any miles on the tune. I say get the tune and get that thing movin

[BLACKHD01]

I know that those HP numbers seem low but these are heavy trucks and you loose alot of power through the drive train, guess we just need to get a STS

[jerry2500]

Originally posted by BLACKHD01@Jun 17 2005, 05:56 AM
I know that those HP numbers seem low but these are heavy trucks and you loose alot of power through the drive train, guess we just need to get a STS

Oh yea

[chrisj6]

Yeah my 5.3L put down 225 rwhp with the tune and the other mods in my sig, what were the torque numbers, thats probably where you really gained!

Chris

[BLACKHD01]

Originally posted by chrisj6@Jun 17 2005, 01:12 PM
Yeah my 5.3L put down 225 rwhp with the tune and the other mods in my sig, what were the torque numbers, thats probably where you really gained!

Chris

I think when we started my rwtq was around 230 and by the last dino pull we were at 250-260rwt, but the tune was fresh , hardly any miles on it.

[chrisj6]

My tune was fresh too, installed on Thursday and dynoed on Saturday, probably had maybe 100 if that. It probably built up alot more torque than that, there was no way my truck was throwing down anywhere near 279 rwtq before hand, much less with how flat the curve was!

Chris