DD 03 at 563hp

[Big MAK]

I deleted and restarted this thread since I think it's interesting to most readers. I've excerpted Keith's rebuttal to some accusatory comments in the original thread. To the accusers: debate is great but don't cross the line into slander. How do you do that when you disagree? Instead of accusing someone of not telling the truth state why you don't think it's possible and under what conditions (in this case; airbox restriction). That way everyone get's educated instead of having to wade through a word fight to get to the good stuff.





Thanks! I'll get off the soapbox now.



Re-touched Re-post from Keith Lockliear of Diesel Dynamics:

Originally posted by KLockliear

I'll try to address all of this stuff here:



EGT is high on this truck stock. We have found that our HO truck will make more than 1300*F pre turbo stock. Our Stage 1 injector set keeps the EGT's the same, with an additional 50hp available to the wheels. Boost stock is about 26psi and we left that alone with the stock turbo. Smoke is non-existant even at the 380hp level we are currently testing at. Mileage keeps coming up the more me drive the truck, so we can't really say with any certainty on that yet, but it's as good or better than stock.



While we now sell the Juice for the Dmax, we did injectors at one point. EGT's were not manageable, so we chose not to offer them to the public. If you want a set, we can oblige you, but we are not responsible for any EGT issues you may have. The HP we can make is real, but for most of our customers, we'd rather not sell something we know to make uncontrollable EGT.



Regarding the dyno graphs - it's obvious from the graphs that the truck we are testing with and dynoing is a manual, which is why our graphs can start at 1600rpm. From the graphs you posted, its obvious that the truck you got graphs from is an automatic, hence the differences of the graph profile. What you posted seems consistent with the 2003 autos we have tested.



We are not going to post every dyno graph we record, it would take all of my day just for that. Saying that our graphs aren't right because yours looks different, and not spotting that this is because of the different transmission and power rating stock, just proves the point that you will say anything to try to discredit us.



At the power levels we are testing with, our airbox does make a significant difference.



At this point, we are specifically testing and developing parts for a towing application. We believe that 400hp will be the limit for towing at WOT without EGT problems. That is our goal. Airbox, turbo, exhaust and injectors are changed to achieve this. Anything above 400hp is hot rod parts. So far we've tested 3 different exhaust systems, more than 5 different turbo configurations, two different cam grinds, and more injectors than I can count. R&D is a tedious process, but the results will be worth it (as they have been in the past). We are currently working with several outside test vehicles as well, to verify our results in a broader field of conditions.



I agree that this airbox is completely worthless at anything over 330hp. At that level, it can be pulled down more than 50%, which is why we are prototyping a replacement airbox. It will flow much better than the stock unit.





__________________

Keith Lockliear

-- email address removed --

Diesel Dynamics, Inc.

2500 4x4 auto: 11. 96 @ 110. 08

 

[jjdiesel]

Thanks Mark and thanks to Keith & DD. This kind of info on the new trucks is awesome! Please keep it comin'.

 

[Diesel Freak]

hmmmm and to think I missed out on the flame fest.....