by dpuckett » Mon Sep 10, 2007 2:45 pm
I had a set of 40hp DDP injectors that were marginal at best. They did give me some power, but added smoke, and no more MPG than stock. They were a marine injector, and were spraying outside the piston bowl (confirmed when I pulled the head to do the head gasket- there were fire marks on top of the pistons, and not just a little soot, either). I dont know about their 3s or 4s. I told him I wanted power, but smoke, EGT, and MPG were more important.
I dont think there is that much demand for 1stGen injectors, esp when compared to 12 & 24v 2ndGenners.
The pop pressures will affect power output and dynamic timing. I would like no more than 3600psi, as stock calls for 3550psi. Stock 2ndGens are around 3850, IIRC. The higher pressure wont necessarily help atomization, as the pressure is already so high.
Dont forget Red Oak Diesel, I believe in Omaha, but dont hold me to that. He is thedieseldude, or something to that effect, on ebay, and his feedback is good, one guy on DTR (Boatnik) bought some and did gain 2mpg over what he had, along with about 70-80 dyno confirmed hp. I have yet to email the shop and pick his brain about his secrets of building a better injector, as I am not in the market at this time.
Daniel
His- 93 W250 club cab LE, auto to Getrag conversion, piston lift pump, 3.54 LSD. 400k+
Hers- 04 QC 4x4. Built auto, Triple Dog, Air Dog. Funny Round truck that aint so quiet.