Checking Relief vavle. Max PSI? proper amount of leak-age?

[JasonCzerak]

Ok, the first few times I checked my relief valve to see if it's leaking. The rail gauge pegged out at 26K-ish. I had just a tinny bit of fuel fill up the bolt hole (about half way). With the EZ on 3 at the time, I could easily cruise at 26K. I'd do this 2 or 3 times a year. eveything checked out the same.



Now, for the most part, I'm not running a pressure box (TST part is broke) at this time. But I am running the Smarty and modded FCA. . This is the first time I've tested the relief valve with the smarty in place (and on wild #9) (I think this may be my problem... )





I disconnect the Airdog as to not over power the return lines with fuel.



I fired up the truck let it idle for a few second and check to see what's leaking. very little fuel coming out the return line (backwards flow... ). Check.



Get in the cab, have someone watching the valve and for anything out of the ordinary. I run the motor up slowly to 3000 and I see about 20,000psi. do this a few times, check the hold and it's still "dry" (as I dried up all the fuel prior to my test)



This time I just hammer it like I did pre-smarty and fca mods. Most I got was 22K... ... ..... after 3 times of that and even up to 3500rpm the hole managed to fill up half way. I couldn't peg 26K



Question here is:



Do I have a CP3 going?



Or does the Smarty have just too much duration?



I'm pondering doing the test again with the ECU with stock software.



What do you folks think?

 

[TCDiesel]

Jason , whats Not to work in the CP3, it works or don't. rarely do CP3s fail. Jason you need to mod that rail if continuing to run 500hp or before a serious repair develops.

 

[KevinO]

What kind of repair could come from having a stock rail?

 

[TCDiesel]

What kind of repair could come from having a stock rail?

Nothing ,it Not the stock Rail I am concerned about.