I have decided to go with dual cp3's, so my question is, what would have better performance, a dual feed fuel line or a modified rail. I have heard that a modified rail is better but I can not find where to buy one? Anyone running either one of these?
Thanks for the help...

 

Well I know they have modded rails here:



But I don't know which one would help you more. Sorry man.

 

according to some... you don't need either. I don't believe you need dual line with dual CP3's either.

 

[QUOTE=tritont;1821089]according to some... you don't need either. I don't believe you need dual line with dual CP3's either.



Wow great info on that site. Man my head hurts from all that info.

 

I don't think either one would give you added performance. The dual CP3's will be what makes the difference.

Look at some of the big dogs like Lloyd Mills. He's putting down almost 1300hp to the ground with a stock rail. I think if the stock rail can effectively support that kind of power you're fine with a puny 700hp or so.

 

I don't think 700hp is anything to sneeze at. that 1300hp was for 5 seconds on a dyno. Quite an achievement but, not anything 95% of the people in the forums can relate too.

 

I agree 700hp is big. The "puny" comment was just a joke.

You have a point about it being a 5 second (actually more like 1 second...lol) dyno run, but Lloyd says he drives the truck on the street too. I assume he's opened it up at least a few times on the road for longer than those dyno runs?

If a modded rail really helps, why are there no before and after dyno tests to prove it? It's easy enough to swap rails while on the dyno.

 

jrussell- There are those that assume that since it only takes 3-4 seconds for a 1200+ run to be made on the dyno that I couldn't possibly know what would happen in "real life" if i had a "real load" on the engine. They do not understand that at WOT on the street I get the same results. Oh well, to each there own. They will never get it in there heads so it is not worth arguing. For those that are willing to listen I will say it again. At level the truck is currently at I have 25K of rail pressure regardless.

And since the 1300 Hp run is not something most can relate to, then throw the nitrous out of the equation and just consider the 850 on fuel only. Besides that run took considerably longer and also has no problems maintaining pressure.

 

Thanks for chiming in, Lloyd. I figured you've unleashed that beast for more than a second or two on the street.

25k at the rail sounds about perfect too. I guess the new Evil dual CP3's are working pretty well!

 

So pretty much, it's a waste of money for either one?

 

If you don't have rail pressure issues now, then it would be a waste. A full rail at 24-26k that holds pressure is all that's needed to supply the injectors. The injector tips themselves are the biggest restriction, not the rail or feed line.

If you do have RP issues now, then a modded (or dual) CP3 is the best way to correct that.

 

thanks for the info. definitly going with dual pumps.
Thanks again!

 

Lloyd drives his truck pretty hard, just ask the cop in his neiborhood he`s hiding from

wayne

 

Actually, the connector tubes from high pressure jumper to injector are the biggest restriction, and can be modified to remove the shouldered "cross" in the center of the tube to have a free flowing tube.

 

They can't be more restrictive than the nozzle holes themselves. That would prevent the injectors from seeing adequate pressure/flow.