Oversize valves for 12V Cummins?

[AsTroSS]

Ok, here is valve spring comparsion

Dodge valve spring (intake and exhaust are same) pn:3926700 and pressure 35psi (exhaust gas pressure to open exhaust valve)

Marine (exhaust) valve spring pn:3925667 and pressure 30psi

Industrial /Automotive engine with exhaust brake (exhaust)valve spring pn: 3916691 and pressure 60psi


:evil

 

[Bobcat698]

Ok, here is valve spring comparsion

Dodge valve spring (intake and exhaust are same) pn:3926700 and pressure 35psi (exhaust gas pressure to open exhaust valve)

Marine (exhaust) valve spring pn:3925667 and pressure 30psi

Industrial /Automotive engine with exhaust brake (exhaust)valve spring pn: 3916691 and pressure 60psi


:evil

Can you fix your post so the pics show up?

Thanks!

 

[AsTroSS]

:banghead: There is no picture, text only ,sorry

My idea was to show different spring pn, pressure and where they use it.

This info is difectly from Cummins.

 

[joefarmer]

Stock and 3916691

brandon.

 

[AsTroSS]

I decide do not use oversize valves, because I have not found who make them and for cutom oder I do not have $$$.

I will use marine exhaust valves (they are designed for high exhaust temp) pn: 3802481 with marine valve seats Cummins pn: 3825176.

Now i have to find dual valve springs.
Who make them? Are they custom order?

Or do 60 lbs springs handle 4000+ rpm and more than 60psi ?

I found dual valve springs from Woodruff diesel, the kit with dual springs and retainers cost $425 (head must machined).


:rockwoot: