Reviving an old thread for good reason!
As some of you know, I was working to get my 2.85 upper and 10% OD lower dialed in on 93 octane pump gas and just wasn't happy with it. Ran too hot/rich and wasn't making the power I expected at all. At the recommendation of
@AZDinoPwr (Huge thank you and extremely helpful along the way), I contacted Dusterhoff Tuning to see what Curt thought about the setup and the immediate reaction was that it is too aggressive of a setup for pump gas on a TRX given weight etc. and that he felt he could get more power and better performance with a less aggressive setup. He recommended that I switch to 3.10 upper and keep the lower (equivalent of upper only 2.85).
The original guys I've been working with at American Muscle Performance, here local, were awesome and agreed to swap the pulley for me and work with Curt Dusterhoff as needed and even refunded me a large portion of what they charged for my original tune. Before I get into the next section, I want to be clear, I 100% plan to keep working with American Muscle Performance and just use Curt Dusterhoff as my tuner, because Scott and his team at American Muscle have been top notch to deal with!
So, we got the pulley swapped and I've spent the last couple weeks working with Curt Dusterhoff remotely to dial in the DT937 Flex Tune he offers (93 octane and e85 interchangeable). The truck is running AMAZING!! It is actually making significantly more power with the new setup, which is less aggressive and about 4lbs less boost, so less strain on the motor and blower.
Below are the results: #1 Stock, #2 2.85 upper and 10% OD lower (Not tuned by Curt), and #3 the less aggressive (2.85 equivalent) DT937 Flex Tune by Curt Dusterhoff.
**I know the Density Altitude is significantly better in the fastest run, however I have an interchiller in both setups so DA is pretty much a moot point**
Stock:
View attachment 53903
First Mod setup and tune:
2.85 upper and 10% OD lower pulley setup (19lbs of boost)
S&B CAI, Mighty Mouse Catch Can, injectors, plugs and FI interchiller
View attachment 53904
Dusterhoff Tuned:
DT937 Flex Tune
3.1 upper and 10% OD lower (2.85 upper only equivalent) (15lbs of boost)
S&B CAI, Mighty Mouse Catch Can, injectors, plugs and FI interchiller
View attachment 53905
Moral of the story.....truck runs faster and smoother on a less aggressive setup with less boost tuned by Curt Dusterhoff.
@AZDinoPwr feel free to chime in!
