To be, or not to be -

[gmctd]

Had opportunity to scan thru GM Powertrain Product Summaries manual -

6.5L V8 Turbo Hi Performance Diesel

18:1 cast eutectic pistons, domes anodized for turbocharging use (anodizing is an excellent heat insulator)

Forged crank

Stud-mounted windage tray oil baffle

True roller timing chain

Hi volume, hi pressure oil pump

250hp @ 3600rpm

430 lb\ft @ 2400rpm

Mechanical wastegate (no EFI here!)

Closed engine coolant system - apparently water-to-water, where heat exchanger was only exposure to lake\sea water.

Yep - marine use only!

Anyone with official access to GM parts listings care to check the veracity\practicality of this?

[JoeyD]

If you get a part # I can check it out. A friend of mine runs the local Chevy dealer parts dept.

[AndyL]

Must also be a different cam profile. I hate to see peak torque at 2400 RPM, 66% up the usable RPM range. Must be the marine aspect.

Do you think this is a new offering? Could possibily provide some cheaper swapable parts!

[grape]

you'll find #4974 on the pump from stanadyne. The power curve is influenced only by the fuel delivery and weather or not you have enough air to burn that amount of fuel. You can back the torque number down the rpm scale with some adjustments inside the pump and on the outside.

[AndyL]

Fuel delivery is not linear on mechanical pumps?

[grape]

nope, they actually start to defuel by 3000 some sort of miny rev limiter i guess. Mine is at full fuel by 2000 and stays at the same output till about 3200, then it draws it back. On the advance piston down on the bottom of the pump you can adjust the screw out so the pump stays more toward the retarded side to help low throttle input torque numbers (cruising down the freeway).