Cant find Governor Springs

[racing4funn]

Looking for 2.6k - 3k (at the most) springs but Im having trouble.
I have a 6CT and a Bosch MW pump.

Sources?

 

[Suprman]

Member nevrenufhp told me he was working on making them he is the resident expert on making more powe. I have seen different ones but I heard they have to be P pump specific and all the shops I spoke with dont seem to know for sure. I am looking for a set myself. I really only want to rev to around 2600 rpms the trans is only rated at 3000.
Will

 

[racing4funn]

Maybe I will just do the spring mod. I read one place to go one click (1/4 turn) and I read another that went three? Someone conform? And what is one click good for on RPM gain?

 

[Suprman]

There are 2 springs. One click is a good start. If one click works good for you then you can go another. Each click is 1/4 turn and you want to go clockwise. Some motors it works better on than others. I get around 2400 rpms with one click. You will want to go a few turns of the fuel screw to give it the fuel to get up to the higher rpms though.

 

[nevrenufhp]

Still working with my injection guy on the replacement springs. He only works on it in his spare time, so I have to be patient. I told him to find 2800 - 3000 range.

 

[racing4funn]

man those springs will have to be the perfect length and tension. thats going to be hard to nail down. Maybe 2800 max is good.. 3k is a lot

 

[Suprman]

2500-3000 would probably be safer for these trucks I'm pretty sure the engine would be ok with 3000 just not the rest of the truck

 

[nevrenufhp]

Bosch has specific spring combos already. The tricky part is different flyweights on different engines, since I want to use them on a DT 466 too.

 

[Suprman]

How much more can I push the stock turbo?

 

[racing4funn]

Bosch has specific spring combos already. The tricky part is different flyweights on different engines, since I want to use them on a DT 466 too.

Please point me in the right direction. A helpful point was the purpose of this post

 

[nevrenufhp]

I dont have the numbers yet. My injection guy has been on vacation. Should know a little something this week.

 

[racing4funn]

Fueling a diesel is what pushes the turbo the most. These springs are not going to kill a turbo. I doubt as long as you still run stock injectors that you will push the turbo too hard. In modding you should be most concerned with EGTs

 

[racing4funn]

I dont have the numbers yet. My injection guy has been on vacation. Should know a little something this week.

Keep us informed. Thanks

 

[nevrenufhp]

Ok.... Here's what it comes to.
There isnt a specific spring combo to use. On the brighter side, you CAN use a Cummins 12 valve gov spring kit. The weights on these pumps are heavier, so it wont rev up to 3100 like on a Dodge. I cant give a specific rpm that it will go to, unless one of you fellas want to test and play with a set.
Alternate option is I can get shims for the small spring(high rpm) to raise up the limit by a few hundred rpm.

 

[Suprman]

What is the difference between adding shims or just turning the spring cover a few notches?
Will

 

[nevrenufhp]

Cranking down on the retainer tightens all the springs, which makes a touchy idle, and sometimes makes it smoke real heavy at low rpm. It also can make it take longer to start(more cranking). Shimming just the upper rpm gives the nice idle and more smooth operation. He didnt say how thick of shims he has on hand, but I will buy some this week to get measurements. May make a thick one myself.

 

[Suprman]

So the springs come out the shims go in and then the springs go back in?

 

[nevrenufhp]

Yes, but you only will be shimming the small inside spring

 

[Suprman]

I did not know there was more than one spring in there. Sounds like a plan then. I would be happy with the shim kit for a few hundred rpms. Please let me know how much.
Will

 

[nevrenufhp]

Good news/bad news:
Good; Dodge 12 valve gov springs will work in the MW and P pumps. Someone needs to try a set to see what the top rpm is. The weights in the 8.3 are heavier than in the 5.9, so it wont go to 3100 like in a Dodge. I just dont know the exact rpm it will cut off.
Look for the ones that come with 3 new springs.

Bad; there are no shims for the small spring on the OEM springs(hi rpm). They do bind and hang up, according to the injection shop.