Lets discuss fuel rails

[HOK]

I've been debating with myself about fuel rails lately.

I've gone to the Aussie forums, the WRX forums and our old archives.

I really want to get those APS fuel rails, just because thier purty. But After seeing the STI fuel rails I don't see the big deal with these. Many WRXs are in the 350 whp range no rail upgrades besides pump and injectors which i both have.

I was thinking about doing the parallel rail mod but after seeing the leaking and reliability problems I'm done with hack jobs. I was thinking about making a "kit" like the APS rail kit. But pricing it out i come close to 300 bucks... for 200 bucks you get it fit and finish like factory.

Also seeing some intake manifold testing where the airflow has a large discrepency from runner to runner I don't even know if we need these. (ie its the air not the fuel that is causing lean conditions in each cylinder). I will find the link to this..

discuss...

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[White 2.5rs]

if you do the parallel mod correctly it will not leak

[Andursun0013]

I've looked at the intake manifold and often wondered if the airflow was the same in each runner. They don't appear to be the same length on cylinders one and three compared to two and four, but maybe my eyes are just playing tricks on me. But I always could pass this off because I convinced myself the lean condition would only be at start up, as once enough air was availbe it would just even out. Then again that could change when adding one of those darn turbos that muscles all that air in the manifold. If the runners where all identical length and shape, problem solved....

Kyle

P.S this is logic from a burnt out college student...thankfully finals are over

[8Complex]

Originally posted by HOK
I was thinking about doing the parallel rail mod but after seeing the leaking and reliability problems I'm done with hack jobs. I was thinking about making a "kit" like the APS rail kit. But pricing it out i come close to 300 bucks... for 200 bucks you get it fit and finish like factory.

Where can you get APS rails for $200?

[HOK]

no no ... its 200 plus 300 hehehe i meant if i'm spending 300 i might as well spend 200 more for the fit and finish and designing...

I won't do the parrellel and refused to be convinced to do it... i'm at the stage if I do it I do it right (or best I can find) I've just dealt with too much ghetto mods to deal with it again. But where i live, even the factory fuel rails leak...

no other comments!?!??@!

[seven881]

I'm using the WRX Axis rails, but the shop I'm at had to custom make an oil filler and modify the bracket to fit. The bracket is a no brainer, but the oil filler is a little more work. The rails come with 6AN ends and run $250. I have an external FPR and run all steel braided 6AN too.

[Derk1127]

how much different are WRX rails? Are the injectors spaced differently? Is there any way to get WRX rails to fit on an NA EJ25 intake manny without much work? Im just jealous that honda guys get to buy rails for 100 bucks and we get the shaft.

HOK- im with you on this one, id like a nice looking fuel rail setup that isnt gonna make me sell an organ. I have the ludespeed parallel setup and it looks decent but it isnt anywhere near the perrin or the aps rail setups. Im interested in rails because SubafastR said in another post that the WRX injectors fit into the 00rs manifold with a wrx o-ring but it wont mate up correctly to the fuel rail.... im so confused, all i want are more injector options

[White 2.5rs]

y ru so afraid to do the mod? it seemed WAY EASIER than i thought it would be after i hacked the lines up

[HOK]

afraid to mod? hehe... thats one thing i never heard someone accuse me of.

If i can justify to touch the fueling system i will do it right. I won't do it half way.

There are two parts to this thread... one is; are fuel rails really required since the uneven distribution of "leaness" is still unclear to me.

The second is $500 +shipping taxes blah blah worth a nice looking metal block with holes drilled in it with stainless steel lines and design...

I think the closer i get to 400 hp the more I will need these anyways I think but just wanted some opinions. Someone is making thier own and allowing me to test them for him... I hope that will work out...

[seven881]

Necessary... Probably not. I went this rout since the FPR was in the way of the turbo and I just like the look of the rails and the steel braided lines. Will it hurt performance... nope. It's kind of an expensive setup, but it looks nice. As far as parrell versus series, I would think that parallel is superior.

[seven881]

The only real difference is the bolt spacing for the bracket that mates to the manifold. The injector spacing is the same and I'm using WRX injectors with a 99 manifold (I jacked the 01 manifold). The length of the rails on the driver comes in contact with the oil filler. An oil filler can be fabbed or possible a WRX one would work, but I dunno on that one.

Originally posted by Derk1127
how much different are WRX rails? Are the injectors spaced differently? Is there any way to get WRX rails to fit on an NA EJ25 intake manny without much work? Im just jealous that honda guys get to buy rails for 100 bucks and we get the shaft.

[White 2.5rs]

There are two parts to this thread... one is; are fuel rails really required since the uneven distribution of "leaness" is still unclear to me.


parallel isnt half assing it
if you wanna waste 5 bills on someones ~80 dollar part go ahead


The second is $500 +shipping taxes blah blah worth a nice looking metal block with holes drilled in it with stainless steel lines and design...

no unless u want bling

[HOK]

I never said "Half Assing" I said half way. If I was going to change the fuel system with something else I want something DESIGNED for whatever I was using it for. Why not go that one more step with increased reliability.

Maybe you will understand in time that using things what they were designed to do will always be more reliable then DIY mods. I am trying to limit my "luck" factor here.

[Derk1127]

steven, what are you using for engine management?

do you guys think a wrx oil filler will fit to our blocks?

[White 2.5rs]

u understand rails are/can EASILLY be do it yourself right?

[Derk1127]

easy if you have a welder, not so easy if you dont.

[White 2.5rs]

alright, but its still diy

[HOK]

you know what.... just let it go... you seem to stuck on one thing and won't let go...

[White 2.5rs]

you seem stuck on the same thing man lol im just tellin u what u dont wanna hear

[HOK]

i asking for options... and you are deadset on one method...

how am i stuck...

[8Complex]

See, the problem here is that White 2.5rs apparently has the ability to make them himself, whereas HOK does not. Thus the difference in opinion. Each of you have your own viewpoints, just admit that you both have different capabilities.

Personally, not only did I design a set of rails, but I also semi-packaged and sold a few sets of them. I had them machined rather then doing it myself, but it's nothing I couldn't do if I was feeling frisky. Parts and machining costs on a rail set with proper stainless lines and a good FPR is around $300-350.

[White 2.5rs]

[HOK]