Turning up GM 6.5?

[ANicklas]

Some of you who have been in the military may have wondered this same thing...

Is there any easy way to turn up the power (whether it be via fuel or whatever) on the GM 6. 5 turbo diesels?

I'm a couple of months away from my second tour in Iraq, and our wonderful M1114s, equipped with the best engine money can buy , are absolute dogs.

I'm trying to find a solution that doesn't need any extra parts and isn't too invasive, in case something happens and the engine needs to quickly be turned back to stock :-laf. Something along the lines of the star wheel on the 12v engines (I think - never owned one).

If anyone has any ideas, they would be greatly appreciated.



aleksei

 

[JacobsD]

If its mechanical I belive there is something on the injection pump that can be turned to deliver more fuel. Be careful though. *I THINK* You have to take the governor and shut-down solenoid off. A friend of mine had a 6. 5 he transplanted into a 77 C10 and he tried to turn up the fuel and ended up having the motor run away on him.

 

[DBraunig]

I think the 6. 5's are electronics only. You might check out Heath Diesel Power 6. 5 GM & Chevy Diesel Performance Truck Parts They are 6. 2/6. 5 oriented.



Dave

 

[ANicklas]

Thanks for the link... . the problem is that to us it's just a 6. 5 POS in a POS humvee... . it's not like it has a certain model year equivalent with GM that I could use for tricks/parts.
I'll try to pick our mechanic's brains without giving away what I want to do... . they probably wouldn't really care, but if they "knew" anything was up it probably wouldn't be too good.

 

[DWest]

93-94 mechanical

92 and 93 were mech. injection pumps. I think the military are also as the electronics are to fragile for battlefield conditons. DW

 

[Joe G.]

Probably bust the crank anyway.

 

[John - K5AWO]

Some of you who have been in the military may have wondered this same thing...
Is there any easy way to turn up the power (whether it be via fuel or whatever) on the GM 6. 5 turbo diesels?
aleksei

Here is a great site for what you want.
The Diesel Page - for the 6. 2L, 6. 5L, and Duramax 6600 (6. 6L) GM Chevrolet and GMC diesel engines.

All they do is GM diesels

 

[ANicklas]

Thanks... . that was exactly what I was looking for.

 

[Vaughn MacKenzie]

I've read quite a bit on the Diesel Page. . . two things that go a long way in helping the bottom end is a mains girdle and a double roller timing chain or gear replacement upgrade. The block tends to crack where the main bearing supports meet the crankcase wall. When the timing chain gets sloppy the timing jumps around too much and can break the crank from "pre ignition" . . . firing too soon. With these two fixes the 6. 2/6. 5 can hold up pretty well. I had a Blazer with a Banks turbocharged 6. 2 which had been run hard for 110k without any problems. Boost ran up to 11psi on stock compression (22:1 or so).

Vaughn

 

[rkressg]

The military trucks are different than the civilian versions. They have very minimal electronics on them. They are probably much closer to the early 90s mechanical versions (even in the newer trucks) both on the 6. 2 and 6. 5.

I can say this, the 6. 5 is totally gutless in a Humvee, but I would not turn it up, the transmission would probably melt.

 

[ANicklas]

Thanks for the replies, guys... .
I guess I'll just live with my POS being slow - I didn't really consider the transmission... I don't know how something could fry behind a 6. 5, but I'm sure GM designed a model for that very purpose.

 

[RJWEST]

dosn't the Mil version have 3 speed 400's, all mech ???

can't kill them with a 6. 5... .

 

[ANicklas]

I don't know about the really old ones, but I know the newer 6. 5s are attached to a 4L80E.

 

[RJWEST]

OK, Thanks, For my info, please.
Are the engines Mech IP's. If so, Is there a stand alone Controller for the Trans.

 

[ANicklas]

I believe the TCU is under the rear driver's side seat. Says something about not getting it wet, though I don't know what else it needs to function.

 

[RJWEST]

Thats it, needs throttle position and drive shaft sensor, I think...

Thanks for info... .