mod fuel rails worth it?

[MA2LA]

I just picked up a new rail with a sensor since mines been messed up thanks to bad filters. and while i have it all apart I'm wondering if ending it off to have it modified is worth it. I'm seeing 200 for just a centerline bore and then another 60 on top to fine tune it some more. Is it worth it.

 

[AMcCormick]

I'm really curious as well. I have a II "bag of parts" cp3 kit I would do at the same time.

 

[Rams-n-Hogs]

I don't know if there is any really good data out there supporting, or not supporting a modded rail. I know lots of high horsepower trucks, including mine, and none of them have one. In theory, the only thing it will do is increase the amount of fuel, (volume),held in the rail, and I personally think that amount would be negligible. My personal opinion, is with a set of smaller injectors, or if you've mildly modded your CP3, it really isn't necessary. Even with the huge injectors I had in my truck at one time, I never felt as if I needed a modded rail.

 

[TCDiesel]

With the super Modded and Dual Pumps that are Now available Modded rails don't ADD hp on Top. They do bring the HP on much sooner and will sustain constant use,if you are looking to add HP on top for the Dyno with Modded Pumps it won't show much. Now if you think that you don't need one don't buy one. but Don't condemn the 3000k Plus owners that have them. some have 300k plus on upgraded sprayers, You would be surprised at how many track and pullers have them. Modded rails always add some performance ,We just cannot guarantee it will be on top.

 

[AMcCormick]

Does this allow increased rail psi with a modded cp3? When you say it comes on sooner would that be equal to throttle response and/or spool up? I feel like I have plenty of go power just would like it to be quicker. And if its not asking too much I'd like better mpg while roasting the tires.

 

[MA2LA]

I'm planing on doing a bag of parts or something like that but nothing more than that. I just have seen a few write ups on it showing that by helping to keep fuel in the rial its easier on the injectors such as the 120hp ones i have and then when you add a smarty its asking lot of the fuel system.

 

[Rams-n-Hogs]

TWest - I wasn't condemning the guys who have modded rails. I had actually considered doing it at one time. I even have the extra rail laying around. I ended up doing dual CP3's, and that solved my issues. That's not to say I won't ever change my setup and try a modded rail.



AMcMormick - I'll let TWest answer your question about rail pressure, but I will guarantee you won't get better mileage roasting your tires.

 

[TCDiesel]

TWest - I wasn't condemning the guys who have modded rails. I had actually considered doing it at one time. I even have the extra rail laying around. I ended up doing dual CP3's, and that solved my issues. That's not to say I won't ever change my setup and try a modded rail.



AMcMormick - I'll let TWest answer your question about rail pressure, but I will guarantee you won't get better mileage roasting your tires.

"O" I did not get that impression,It's that some always post form the platform of selling,T&C We try to help, Example, we have been modding the LV for constant Pressure ,this means we can set the Pressure and keep it,Many owners were just capping the LV port this ensued injector failure, Even after companies made it clear that capping was not recommended and destroyed injectors, "when" capping would not be covered under Warranty. This "You Don"t need it" is costing some $$$$. Modding 3rGens and every Day Driving is extremely hard on Injectors. If you cannot keep constant Pressure and Volume to the Injectors they will be Hammered Until DEAD. Their is a big write up at our site about (Water /Fuel Hammering) and the effect it has.

 

[TCDiesel]

Does this allow increased rail psi with a modded cp3? When you say it comes on sooner would that be equal to throttle response and/or spool up? I feel like I have plenty of go power just would like it to be quicker. And if its not asking too much I'd like better mpg while roasting the tires.

Yes it brings the HP sooner,3Gen injection is NOT depended on RPMs,the CP3 is,it runs at 1/2 engine speed,We took a CP3 and hook it up to one of our 3000 rpm electric motors,it when BOOM and leaked all over the Place. it was a very crude test but it showed that changing the gear ratio would not help.



I would suggest a upgraded foot will help the MPG area.

 

[CDonaldson]

I've been considering adding a modded rail to my truck. WhileI have not been working to build somekind of super machine, I have been working to build in a more dependable, reliableness that seems to have evaded the 3rd gen owner due to underbuilding our fueling systems. The modded rail only makes sense to me, a must for those who are seeking to have a longer engine life, injector life, cp3 life. I use my truck 50/50 daily driving and towing. Modded rail, 'bag of parts', both are my list of the next things to do. Maybe I'll start with the rail sooner than later.





CD

 

[Mobius1]

I have a modded rail in my truck and I believe it was worth it. I do not have any dyno numbers to support any claims, but by the sotp feel its a decent gain.



When I first put it on i didn't feel much of a gain, however at the time I had an edge EZ and after I installed everything back and went for a test drive, I realize I did not even hook it up, and i still felt a little gain.



For the price its worth it, I noticed a little better pickup off the line.

 

[AMcCormick]

How hard is this to install? I have an AirDog 150 and the II "bag of parts" sitting waiting to get intsalled. Maybe upgrade the whole fuel system at once. I am on the fence about the cp3 mod. I have to imagine that all these fueling upgrades will hurt mpg?? How do you bleed the very high psi fuel system?

 

[TCDiesel]

The B-O-B most trouble some area is the Little ball behind the spring when you remove the line fitting on the CP3, Be very careful when you remove it. the ball may stay in the chamber ,but in most cases it falls on the floor and is gone,When the new fitting is installed take some grease and place it on the spring,then attach it to the new fitting supplied in the B-O-B, then place more grease on the spring were the ball sits, then place it in the freezer for some time, this way the ball and spring will seat correctly. if you lose the ball we have plenty.

 

[Mobius1]

How hard is this to install? I have an AirDog 150 and the II "bag of parts" sitting waiting to get intsalled. Maybe upgrade the whole fuel system at once. I am on the fence about the cp3 mod. I have to imagine that all these fueling upgrades will hurt mpg?? How do you bleed the very high psi fuel system?

The Mod rail you mean? Not too hard at all, Removed the fuel lines, Obviously make sure fuel system is COMPLETELY disabled while you are working on it, you don't want to mess with this kind of psi, Didn't even have to remove any lines from the connector tubes.



As far as bleeding, The instructions say to cycle the key from off to run like 3 or for times for 15 seconds, then try cranking, If it doesn't start, try the procedure again. I don't recall the exact procedure, But detailed instructions are included. Its not like the second gen engines where you have to crack open some fuel lines to bleed.



So yes AMcCormick, it will give you a little better pickup off the line as well as better fuel economy (If you can keep you foot out of it) :-laf

 

[AMcCormick]

Thanks, yes I was asking about the rail. Is there any residual psi post cp3 after shut down? If so how to deal with it? I dont really feel like getting sprayed with 20k psi diesel.

 

[JJPage]

TWest, pm me a price for a modded rail, please.

 

[CDonaldson]

TWest, please pm me with a price also and details for what Iam assuming is an exchange of my rail. My rail has about 40K on it, will that make any difference?? I have had a 2-micron filter at the input side ofthe CP3 since my truck wasnew, I am assuming less cavitation??



I guess it's time to bite the bullet. I have noticed my rp fluctuates quite a bit under accel, also at idle. My fuel pressure is solid at 10#s with the stock pump, I can pull it down to 8#s under heavy accel and heavy towing on steepgrades, but the rp fluctuations suggest to me I need a modded rail.



CD

 

[Mobius1]

Thanks, yes I was asking about the rail. Is there any residual psi post cp3 after shut down? If so how to deal with it? I dont really feel like getting sprayed with 20k psi diesel.

No, There is no residual fuel psi after shutdown. Just make sure fuel system is COMPLETELY disabled before upi start tearing into it.

 

[MA2LA]

Ok i'm Going to go with it. I have a new one in the box , now to go with the mild or wild lol. its always something

 

[Mobius1]

Ok i'm Going to go with it. I have a new one in the box , now to go with the mild or wild lol. its always something

Go with Wild, They are pretty much the same price wise, But with the modded rail, you can do more with