P-pump 6.7 cr?

Mike Holmen said:
Ya probably will, but it would be neat to have a modern driveline in an older truck. I have a thing for 65 C-10 Chevy trucks or early 70's power wagons.

Now, I just have to wait for someone to give me a truck..:nail:
Click to expand...


Your mentioning modern driveline and ppump.
 
I already have a spare 2007.5 6.7L enginem just sitting there, collecting dust, still have oil in the motor. I'm going to see about getting a gearbox housing made up, I have a buddy with a few CNC tools. Its going to be cheaper than getting the original 6.7L ECU and wiring stuff to work.

Probably going the 12v rod route, as I have lots of sets just kicking around.

Its been awhile since I looked at the 6.7L piston bowl, but I think its bigger/wider than the CR bowl. So the 6.7L piston should work with the 24v injector.
 
Am I correct that the 5.9L and the 6.7L rods are the same length? If that's correct the only difference is the piston pin height. The 6.7L crank has a stroke of 4.88 and the 5.9L is 4.72?

I haven't taken apart my 6.7L yet and done a side by comparison with a CR 5.9L
 
Kennys Pulling parts also makes a 6.7 PPump cover and Adjustable cam and pump gears as well. Does the CP3 and PPump share the same taper? im thinking they do?
 
AFAIK, the CP3 has a much smaller shaft. The gear is much smaller anyway, so it would be of no use.
 
Tate said:
AFAIK, the CP3 has a much smaller shaft. The gear is much smaller anyway, so it would be of no use.
Click to expand...

So i need a custom pump gear? i was under the impression that they used the factory straight cut geartrain with a Custom housing so it had the strength to support the p pump and proper mounting bosses. Also twith the p pump and cp3 side by side the shafts look identical, just never had a caliper to go over them. Ill have to find mine and take a look.
 
I would be afraid of the cam gear, isn't it really thin? I don't think it would handle the load of a big Ppump.
 
Ben46a said:
So i need a custom pump gear? i was under the impression that they used the factory straight cut geartrain with a Custom housing so it had the strength to support the p pump and proper mounting bosses. Also twith the p pump and cp3 side by side the shafts look identical, just never had a caliper to go over them. Ill have to find mine and take a look.
Click to expand...

Shaft size might be the same, that I don't know. But the cam and pump gear need to be the same size/tooth count. CP3 gear isn't that large.

Why not run the helical cut gears on it?
 
Tate said:
Shaft size might be the same, that I don't know. But the cam and pump gear need to be the same size/tooth count. CP3 gear isn't that large.

Why not run the helical cut gears on it?
Click to expand...

Honestly i dont know, Ive never PPumped a CR let alone a 6.7. Still waiting on insurance to clear it so i can pick it back up and get at it. Ill look into it more when i rip it apart.
 
It's a step backward in airflow. Cutting a hole and patching the intake plenum is not hard. You only need to create a 1/4" of clearance.
 
SHughes said:
It's a step backward in airflow. Cutting a hole and patching the intake plenum is not hard. You only need to create a 1/4" of clearance.
Click to expand...

Anybody ever done an air flow test for a 5.9L vs a 6.7L head? I bet that they are pretty close to the same flow numbers.
 
A CR head flows a little (not a lot, but a bit) better than a VP head. I guess I should have specified. The VP head has the relief for the P7100, where as the CR heads do not.

Now as far as a 6.7 head vs a 5.9 CR head...I thought I heard that it flows a little better, but I'm unsure.
 
What do you do about the oil pump? On the 6.7 they have straight gears and the pump on the 6.7 is smaller in diameter.
 
SHughes said:
A CR head flows a little (not a lot, but a bit) better than a VP head. I guess I should have specified. The VP head has the relief for the P7100, where as the CR heads do not.

Now as far as a 6.7 head vs a 5.9 CR head...I thought I heard that it flows a little better, but I'm unsure.
Click to expand...

I would bet the 6.7 head would flow better, IIRC the 6.7 head has bigger intake valves
 
You must log in or register to reply here.
Back
Top