I really don't have an answer for that, as you already know, there is very little info out there on these engines. My advice would be to get a pyro, and boost gauge, from what little I've been able to find, the safe max is 15 PSI, but the stock blowoff valve is set to 12 psi I think. Anything to help a diesel breath better is a good thing, so opening things up will hurt nothing and might help control EGTs too. I might try to cross reference an ARP head stud that fits, because as of right now, stock head bolts are all there is. <img src="/forums/images/graemlins/frown.gif" alt="" />

I know this is a dodge article, but the diesel ranger uses the same basic bosch injector pump.

http://dodgeram.org/tech/dsl/more_power/Power_ve.htm

I would advise increasing the fuel in 1/4 turn increments or less, the fuel screw is very sensitive.

On the diagram posted above, I turned up the "smoke" and the "power" screws a full turn each. I tried a 1/4 on both but it didnt do anything.(pump was maybe detuned pretty bad) I'm the only one who drives this truck, so, I watch pretty close what I do with the pedal. I can turn the tires into 3rd gear, but, I dont drive it that way. I am waitin on guages from Dakota Digital, so I can see what exactly its doing.