Hi, who here has experience with modded rails? Are they are worth while mod for a stock CP3 and upgraded lift pump? I dont see much information on them. They are pretty cheap so I was wondering how they work. Thanks

 

It's a better upgrade than using a dual feed line. Don't know that it would help much on a stock set up though.

What it does is makes the rail ( storage tank ) a little larger to increase it's capacity to have more volume available when asked for. It will help the rail to not run dry.

It's been a secret mod for high HP guys and pullers for a while now.

 

It's not needed. On Reb's truck, the stock rail is supporting 1,289 rwhp.....

 

It may not be needed but, he might have gotten 1389hp if he had one. Not saying he would.... but, he could.

You can't compare a truck like that to your basic modded truck either.

 

I just recently put a modded rail on mine. I noticed a definite increase in rail pressure and performance. My stock cp-3 was struggling to maintain pressure under WOT. It would spike around 23,000psi and begin to drop( as low as 19,000psi).With the modded rail the pressure will go to 25.5k and drop slightly at WOT( I think because of the Smarty program, not lack of fuel)Off the line power is noticably better.I think it is a cheap solution for someone who is border line on needing a modded cp-3.There are some post on TDR as well with more info.

 

Why can't you? All of the mods on that truck are simple. Nothing special. It's got a stock short block that was out of a salvage truck (never torn into), standard dual cp3 kit, some of Don's injectors, off the shelf turbo, standard programming (no crazy race tune), standard TST, EZ, and some NOS. The pressure never drops with the cp3s (still max out the pressure).

The only thing different between this motor and someone elses that has the same types of mods, the injectors are bigger and the turbo is bigger.

 

Oh don't get my truck wrong... it could but in my opinion.... NOS is cheating. Yeah, he has some nice numbers but, even people can have super human strength on drugs!

I guarantee if he keep up those numbers, the engine won't hold up long. There's the difference. My truck is built to last and his and many others are dyno queens. I'd like to see 1300hp driven on the street..... there's another difference.

Why so defensive man ? Do you actually know the modded rail isn't needed ?? For all you or Reb knows, that rail could put him over 1300hp. There are dyno numbers showing the added gain by using a modded rail. As sootman over on CompD... he has them.

 

I would have to agree with Tritont. using dual cp3 is an advantage as well. Barry has a stock cp3 so we need to compare apples to apples like Homewrecker is with his stock cp3 and replacement rail.

 

The reason I ask is I was either planning on getting an upgraded CP3 or doing the self mod and a modded rail. I am shooting for low 600s for power and it sounds like that is right around it it starts mattering. Just trying to make up my mind. Thanks for the input.

 

Ok on this subject? Liquid does not compress right? As far as I know it doesn't, so how can a modded rail help?

 

It doesn't create more pressure, it creates more area to store more fuel. The fuel bungs on both ends are extruded along with the center of the rail. There's a lot of skepticism about them but, there are many, many of them out there in use.

It cuts down restriction and by having more fuel at the injectors finger tips helps prevent running out of fuel to them.

 

I would say to go for it. Try it and if you dont like it, sell it to me
Every truck is different and reacts differently to mods. Maybe when your rail was made, there is a defect restricting it so putting a modded rail on may make a huge difference.

How is NOS cheating? That is like those guys saying if they has a better reaction time at the line, they would have won. At the end, a win is a win.

 

Dyno queen. That truck is a street truck. It's been over 800 hp for 20,000 miles. It takes abuse. I just seeing there are ways to spend money a little better. I'm not knocking your truck, the product or anything like that. I'm just stating that it has been done.

It could have put him over 1,300... who knows... Maybe if the tires would hook on the dyno it would have pushed over 1,300 also. Too many variables. Does it really matter... no. There is more time and more people to push things farther. It'd probably go crazy if we put some twins on... Without the NOS, it doesn't like the dyno. That turbo needs RPMs, so we feed it a little suppliment.

Once this motor goes, we'll see about building another. That one will have better parts in it. Until it does go, we'll see what this little 235 cali motor will do.

 

If you talk to some racers, you'll find that reaction time means everything ! It can win or lose a race every time.

Anyone can make a crap load of power using NOS. It's a quick fix. The real challenge is to make that kind of power without it.

It's kinda the way the 12V guys feel about us CR guys with electronics.

 

I bet Schied feels that way about us CR guys..... They just .