Project Zero G Forums

I took the truck to Turbo Tune in Greensboro, NC and had a good time for my first dyno session. We took it through probably six or seven pulls on the dyno. From my initial tuning, it was churning out 234hp and 240 pounds of torque, and after a few runs and tweaking the afc, it ended up making around 262hp and 240 pounds of torque. So overall it was a gain of 28 peak horsepower. You can see the darker blue and red line that lost the slump in power in the end, so basically between 4000-6000 rpm the truck gained 58 hp. The butt dyno can feel that extra 58, where the engine used to let off a little in power, it now pulls all the way through to redline. I was hoping to go to the track again this week now that I'm tuned, but I'll be out of town for work, so hopefully the following Thursday I'll be able to take it to the Dunn-Benson 1/8 mile strip and turn some heads. Last time at the track, my best time was a 9.37. The shop recommended that I basically double the size of my intercooler core because it was starting to have too much heat soak, so that will give me another project and motivation before I can turn the boost up to over 20psi, for today, I still had it set at 17psi.

David

HMM, looks like your torque has a dip in it around 5k. I've always understud this to mean that something in your intake system is not a good match for something else(like a head port job made for max low end torque with a large runner intake manifold). I think it could very well be the intercooler in your truck, or it might be a multitude of other things (turbo, intake, throttle body, head, etc).

Anyone else ever heard of this??

I can't help there too much, It might be the intake. I had another type with cicular tubing on there before with shorter runners and it seemed to feel different.