fuel injectors/rail setup

[markmakeitso]

good day eh
i'm an automotive engineering student up here in minnesota, and as such, i have access to equipment someone of my experience should not be within 50 yards of. i was planning on throwing my injectors on the cleaner/testing machine we have.

first of all, anybody know an approximate fuel pressure to set the machine to for flow and pulse testing? i'm running stock pump, injectors, with a new filter. that sounds kinda pathetic, like a new filter is my attempt at upgrading.

secondly, i've heard that the stock fuel system after the filter is fairly restrictive, which leads to lower injector pressure at the far end of the rail than at the passenger side. is this not a big problem with a stock set up? how about if i plan mild upgrades, like an intake and an intercooler sprayer? would it be worth my time to place the faster flowing injectors towards the end of the rail to try to counteract the lower pressure?

let me know if i'm sweating little stuff
thanks
mark

 

[NDgsx]

Injectors are tested at 43psi.

Don't worry about it.

 

[rdrkt]

Originally posted by markmakeitso
secondly, i've heard that the stock fuel system after the filter is fairly restrictive, which leads to lower injector pressure at the far end of the rail than at the passenger side. is this not a big problem with a stock set up? how about if i plan mild upgrades, like an intake and an intercooler sprayer? would it be worth my time to place the faster flowing injectors towards the end of the rail to try to counteract the lower pressure?

I wouldnt worry about it my buddy Wes #11 on dsmtimes.org is running 960cc injectors all the way around. He pulls his plugs almost every time he goes to the track. I have never seen an indication that the plugs on one side were getting less fuel then the other.

 

[nowayout]

Stock rail flow pretty good. right pressure and good pump you should have any problems.
Unless your going to run over 600hp.

 

[Awdboost]

I have problems keeping my fuel pressure down. What are you talking about? Trust me our fuel rail are good for 11 and possiably lower.

 

[brokeawd]

Stock filter on these have no problems supplying enough fuel for 41psi of base pressure and 660's running 28psi on a green.

I have talked to a couple of guys who chop the stock fitting off of the filter and use a straight-thru setup from the 300ZX stock filters. Clamp a rubber hose on the supply side, and cut your existing hose to the rail and clamp it to the outlet of the 300ZX filter. No leakage problems what so ever. I guess they flow alot better than the mitsu style.

Im in the process of doing it to my next project.