Competition Fuel Lines?

[00blowingsmoke01]

Does anybody have any Info on whether larger lines from the Injection pump to the injector is a good thing. I would like to try this might help with HP or Pump life.

 

[willyslover]

many of the higher fueled rigs are using larger lines... heck even sone stockers are using them. . AN -6 on normal to low power and AN -8 on the fueled rigs is the most common

I'm about to go from -6 to -8 on mine [from tank to injector pump using a 12 x1. 5 MM to AN -8 mxm adapter at the pump. . replacing the lift pump and filter to all -8 sized units].

 

[Blowingsmoke]

I would like to change the fuel lines on my 24 Valve just wandered if it would hurt or help the pump?

 

[JR2]

Changning the lines from the tank to the pump is a good idea, especially on a bombed truck.



The origional question of changing the lines from the pump to the injectors has not been addressed. I believe you are asking for big trouble trying to change these. Those lines hold major pressure and I believe they all have to be exactly the same length or the injection will get all messed up

 

[willyslover]

ooops mis read the original post. . sorry



there are several very high HP rigs who have changed the lines from the injector pump to injectors. . I will eventually also but not there yet. however I do not think it is needed till your very high horse powered [over 550 by far]



If they want to step forward and fess up I'll let them. . some are not talking about it yet

 

[Mopar-muscle]

very interesting willys , are these on 12V or 24V ebngines ? i can't see it being as critical on a VP'd engine but a requirement on a P pump ...

 

[Shrimpy]

A former member (who shall remain nameless) went with lines he got from Cummins and had minimal gain. This was dyno verified, I was present for the second run and he was not a happy camper.



You are correct JR2, length was critical. These lines were 23% larger I. D. . He spent close to 10 hours, If my memory is correct, just bending them !!!!! Just because it flows more doesent mean it will translate into more H. P. .



Just my two cents... ...

 

[cmonroe]

Shrimpy, the former member that had little gain with larger injector lines, how much horsepower was he building? And if you remember what were the gains?

 

[Shrimpy]

Cmonroe, after re-reading the thread it appears I have crossed over 12 valve info since the thread starter has a 24 valve. But to answer your question, at the time said truck was putting out 475-480 hp. I was not present for the first dyno. At second dyno, truck made 488-490. As I understood, and I could be wrong on this since I am going on memory, only mod was the new fuel lines form P pump to injectors. He believed he would be over 500 hp. This was all on #2 Diesel only. He said it was a B!tch bending the new lines, took A LOT of time. I believe this person will be at the next Dallas area Dyno on the 21st of Sept. I will try to get some more info from him on any other mods since.



Later.....

 

[fj40charles]

Shrimpy,



He said he had a bag 'o tricks up his sleeve for the dyno days. I think he will be there. I think we'll be quite impressed.



Charles

 

[willyslover]

I think the injector size will determin the need... sorry so long to answer. . been out of town again

the very heavy fueled ones are the guys who should be testing this... don't think that the 475 HP area even gets close to the need of larger lines... . many other things that will help those guys first