GrossPolluter

iTrader: (1)

I remember a while ago I saw a post on how people were changing the fuel feed to the injectors. Instead of having the fuel go to primary-sencondary-fpr, they were having the fuel go to the primary and secondary with a "t" or a "y" and then to the fpr.

Do the 2ndary injectors starve with the factory routing?

What are the benefits of switching the routing?

I forgot the factory fuel line size, but I was thinking of just doing everything with that size hose. I wasn't going to go fancy just barb fittings and hose clamps

Anyone recommend or not recommend any brand? I'm not trying to go super fancy, but I don't want to buy junk

RotaryEvolution

iTrader: (30)

benefits? almost none, for additional cost and effort. there is nothing wrong with the stock series rail system and the flow rate even with the system system can support beyond 500 horsepower on pump gas.

don't overthink something that is not a problem. some people like to move things around to make themselves feel smarter.

tuscanidream

iTrader: (6)

I made a thread on this same topic a while ago, and came to the conclusion that if you need to run your fuel rails in parallel because you were loosing fuel at an injector towards the end of the line in series, then you probably have a diffent issue like maybe your fuel pump can't keep up? I'm no fuel professional, but that logic just doesn't make sense to me. PPRE is running 6 injectors on one "string" in their parallel setup for the blue 6 rotor rx4. 13b is only 4 injectors total.

RotaryEvolution

iTrader: (30)

i've run completely stock fuel rails with stock FPR up to 350whp, beyond that i would simply upgrade the regulator to handle the excessive boost/pressures.

i would only bother with a parallel system on a car pushing beyond 500 or running alcohol through the system, and even then there are still ways around it to keep things simple.

for an injector to begin running lean it would require a complete system pressure drop, which is reliant on the fuel pump. if the fuel pump is holding its own you won't have any injector trim issues with a series system.