Guinea Pig:

2004 GMC Sierra 4x4 LB CC 3500SRW

Mods:

100HP Predator LLY tune.
4" straight through exhaust, no cat, no muffler.
TTS Triple Disc, Suncoast III.
Stock everything else.

Dynojet CF = 1.00
No Torque. Couldn't get it read the injector.
3 pulls.

385rwhp
383rwhp
389rwhp


This truck was 246 stock.

Nope. I don't believe it either. The real proof is at the track. Going by MPH, I estimated the tune to be about 120HP, and from what I saw, I might be right.

Pretty impressive numbers just the same....Amazing output for the relative low cost of the programmer......

Wow.. thanks for the info.. good numbers

Thats about in line with what I heard from another source.....thats one heck of a program plus all its other fetures for the price. Thanks Mcrat!

Here is a predator laying down about 100hp but not on a built tranny. http://www.dieselplace.com/forum/showthread.php?t=21915&highlight=predator+dyno

I know one thing........after reading post after post of people with edge problems, I'm sure glad I got the predator. Installed, have lots of power with no problems and a code reader tooboot............Rick

those look like some good numbers for hp put i wounder what the troque would be

What I should have isolated was the exhaust. I'm not sure how much the open exhaust was worth. But for practical purposes, nobody is going to run a stock exhaust with a 100HP or up tune.

It appears that an open exhaust verses a stock exhaust on a big tune might make a 40rwhp+ difference.

I have been playing with the 100hp tune for the last couple of days. I was wondering what type of egt's you are getting on that tune. After driving for a couple of days on the city streets....I beleive the 85 hp tune might be a little better for the daily driver. The throttle is too touch on the 100hp tune, and the smoke is pretty excessive.

I need to get some gauges so I can be more comfortable driving it maxed out. 40 hp from a 4" exhaust sounds nice....I wonder how much of that is just in the cat.

Can anyone explain why it is so loud? It isn't bad on the streets but on the highway it is very noticable. It is the sound that happens after 80mph (pilot injectors cutting off) on the stock tune....but now the noise is there at all speeds.