i was going say if it was 90.00 id go ahead and replace it for the one if modified, i hate it being there i guess, but i confirmed the stocker was bad and i hated it being in there too. dont know thats why i was tring to ask earlier as to what pressure the relief valve opened. for a peace of mind on this if its true thats its 30,000 like cummins said i think im alright.

 

You are correct on the first part, but if the cp3 can maintain the pressures I see(stacking 2 very successful fuel modifiers) in the rail(25000-26500) w/ two lines feeding it from the STOCK CP3 and stock 03-04 injectors(I believe injectors are the big difference in 03-04 and 04.5+ trucks) I think different results from different trucks can be expected. Trucks that are more stock(injectors etc...) will see more power. It's obvious if a truck has larger injectors and a stock CP3, then NO, an additional line to the rail is not going to help and WILL make things worse. Alot of this seems like common sense. I dont think some of you realize the potential of a stock CP3 w/ a HP LP and a dual line kit w/ stock injectors.

 

5183245AA Fuel Control Actuator - available as a replacement part - no longer needed to replace entire CP3 list price $202

5093113AA VALVE, Pressure Relief list Price $455

 

yes those are dodge part numbers and the fca price is the same # and price they gave me, wich i got at cummins for less than 100.00. also dodge priced the rail sensor [dont have the number in front of me ] at 572.00 , got it at cummins less than 60. and dodge priced the relief at 770.00 were cummins said 452.00 for cummins to still be that high it for some reason is just a very expensive part. Those are just the prices that i got.

 

I would have to say the rail relief valve is fairly salty because it is surely hard to calibrate something to "pop off" at 27,500 PSI. Has to be fairly accurate too. As for the prices....those are "reccomended " list price. Dealers sometimes have a habit af marking them up an additional 20 - 30 %. I've seen it done. Have to remember also, that every time someone touches that part, the price goes up! Just like at the grocery store........what do you think it costs the manufacturer to produce a can of corn ? It ain't the 69 cents the grocer has it marked at! Everybody has to make money!

 

true, thats true. was you one of the guys also having the long crank to start prob. if so how are you coming with that, any headway?

 

knock on wood.....no long crank problems for me!

 

well same for me , think goodness sofar it was a friend having the trouble, i bet you have truck, tractor pulls around you up there in Indiana down here in texas i just here a lot of talk about it there must be nice!

 

good point, seems like you might be onto something. In my case, (no dyno) after adding the dual line I was able to turn the TST up 1 additional level without losing rail pressure. This was with a stage 2 cp3.

 

When I see some of these guys w/ 05s pushing 650hp w/ stock CP3s and stock injectors, I do believe the stock CP3 can move some fuel. Now, my question is are all our CP3s the exact same?

 

The '05+ trucks seem to have much less of a problem supplying enough fuel volume & pressure than the earlier 3rd Gens - don't know if the CP3s are different, but I believe the in-tank pumps help quite a bit... since it's easier to blow rather than suck!

 

I agree, mine ran like crap 'til I got the Walbro system set up at 50psi, then no more rail draining. No mods to the cp3 except a dual feed line.

 

With the dual line I kept rail pressure at 26,000 But lost power. Kinda wierd. But with out it I could only get rail to about 24,000ish But had more power. Both runs the puck was set on kill.

 

50 psi with the Walbro?

That seems high!

Wonder what the max feed pressure (if any) for the CP3 is?

 

Results not common

I only know of a few members with thoes numbers and it seemed to be a fluke occurance since havent heard of them being able repeat it with the same mods.

Im not calling them liars it I totally believe them and they have proven it w/ dyno sheets......maybe their trucks and dynos were having a good day