OK, my engine totally falls on it's face about 3000 RPM. It will barely do 60 MPH. I recently added a set of Stan's Headers, so in theory I should be able to run the engine at higher than stock RPMs.

How hard is it to adjust the governor? And, how is it done/ I can't find any info on it here in the forums, or anywhere else useful.

I also probably have a governor shaft groove problem, so maybe I can do both at the same time.
TIA, Joe

 

max rpm is only 3300 you shouldnt be redlining the beast all the time not good forit at all.if you over rev it you could do major internal damage,pistons smaking valves and such,ouch.you have alot of miles on her to be running her that hard.

 

Headers might let it breathe better, but it won't help it stay together at high Rs. I think to get it adjusted you're looking at a trip to the pump shop.

 

Joe ... tell us what it is you are trying to do. With the 410 diff you are probably only going to run around 68 (+/-) anyway. The tach will show an approximate rpm. The governor is factory set and will be set the same from the pump shop. (unless you sign papers to relieve the shop from damages)

 

What I really want to do is turn the governor up to about 4000 RPM. According to the folks at Stan's it should have no problem running the higher RPM. And I'm really not worried about blowing the engine up, I figured I'd test thier claims a bit. If it breaks, it needed replacing anyway. Also, I believe the governor shaft has been signifiactly grooved during it's life and beeds replacing as well, figured I'd try and kill two birds at once.
Joe

 

I wouldn't want to test out that theory. I had a full sized Cummins in the shop once that had the gov. turned up so it could run 3000 rpm (normal is 2100). It had a broken crankshaft. It was supposedly rebalanced to be able to handle it also.

 

What is the groove you mention in the governor shaft? I've repaired or rebuilt many DB2 pumps, but I'm not sure what you're referring to? I don't recall any common wear areas associated with the governor getting grooves in them.
As far as setting the high-limit for R.P.M., doesn't your pump have an external adjuster screw with a jam nut and lockwire? I'm a little foggy on the DB2 when installed on the I.H. engine; most I've worked on were on industrial and forestry equipment.

 

We had a shop turn our redline up from 3300-3600. It made a big difference in the hills. Before it would barely crawl up the hills. After that we could run it in third all the way up. That extra 300 rpm at the bottom of the hill would let it run out the top without shifting. If you can turn a 3406 cat to 2650 I see no reason to worry too much about 3600-3800 in one of these engines. I don't think I would go 4K unless I had recently rebuilt the motor, but then again, I'm kinda new to these engines too.

 

Apparently governor springs for a 5.7 Chevy can be substituted, brings the redline up to about 3800 IIRC and moves the whole curve higher in the RPM range.

Birken

 

I still don't understand the discussion about governor-springs. The injection pumps on my Fords and GMs (Stanadyne DB2s) all have external governor adjuster screws. Very easy to change the governed RPM and no dissassembly or parts required. Also, I still don't know what the "groove in governor shaft" is all about.
Can someone explain? I've had many of these pumps apart, and I don't know what part is being referred to.

 

My 7,3 marine engine is max 3400 at full load but guvenor rpm is 3800. This engine has oil coled pistons.. Oil is spraying under the pistons to reduce heat

 

id say dont turn the gov up. diesel engine likes to rev slow. High revs will just kill it. now if ya have money to burn well have fun and let me no how she hold up. my truck has almost as many miles as yars and iam hoping to get another 100,000 out of her yet.

 

Far as I can remember all these engines have oil cooled pistons.

 

Yup.