MeentSS02

iTrader: (11)

Meziere electric, and how it looks is how it came. The power steering pulley is the Turn One pulley that you can get with their power steering pump (you can also order it separately).

Big Bird WS6

iTrader: (9)

the green ta. i believe his name is kyle. also know as nasty TA. has this set up. i am giong to do it like this. but shouldnt the regulator go before the injectors?

sevanseriesta

iTrader: (34)

See I had heard the same thing. But after doing some research this morning I found Lonnies telling people to put it after the rails.

I can definently see the logic to this. If you think about it. If it is before the rails if you start using a lot of fuel you would have to refill the rails. I will use a damn as a metaphor. Think about it like that if the damn is closed it backs up the water. If your fuel rail is behind them it would work the same way right?

405HP_Z06

iTrader: (11)

No, the regulator should be placed after the injectors. Doing it this way will provide full flow to the rails and injectors while bypassing unneeded fuel volume back to the tank. Putting the regulator in front of the rails will make the rails catch up during periods of high flow, causing more fluctuation in fuel pressure and volume. This will also cause high fuel temperatures and aeration to be worse due to the large amount of fuel constantly bypassed to the tank.

Big Bird WS6

iTrader: (9)

^ ^ ^ but if i wat to have my injectors at 48psi(fuel presser) but with my pumps they are at 74psi. how do i fix that with it after the injectors

405HP_Z06

iTrader: (11)

It will regulate the pressure at the rails to what you set at the regulator. It sounds backwards, but it works.

MeentSS02

iTrader: (11)

Think of it like damming up a river...the excess beyond your set point just rolls off and goes back to the tank. The regulator DEFINITELY goes after the rails.

Camaro396

iTrader: (14)

Old setup:



New setup:

stevieturbo

Ideally yes.

But it doesnt have to. If it did...how would the stock dead end system ever work with the reg in the tank ?


Plenty of people here run their regs mounted between the pumps, and the rails where it isnt a full flow system through the rails.

Some might even suggest that not passing fuel through the hot rails/engine compartment and back to the tank evry few seconds, is beneficial to fuel temperature.

MeentSS02

iTrader: (11)

Well...that was the problem I found with the dead head system originally in my car. Fuel pressure would go from 58 down to 48-52 psi at WOT, and would visibly drop by just loading the engine up cruising down the interstate. My injector duty cycles were through the roof trying to compensate for the pressure loss...

If I'm not mistaken though, the manufacturers did it to help keep evaporative emissions down since you aren't returning hot fuel from the rails back to the tank.

Me, though...I'll keep my pressure steady, baby seals be damned.

stevieturbo

That's just down to stock setup inadequacies.

That doesnt mean a setup with the reg before the rails wont work.

MeentSS02

iTrader: (11)

IMO, that is the inadequacy of having the regulator in the tank. If you are running one up by the rails, there is no reason to not have it after the rails.

Changing nothing else other than putting the reg. up front after the rails and removing the stock in-tank setup (still stock pump and hard lines) was enough to keep the pressure steady under high load, low RPM conditions, and only drop 2 psi at WOT.

Camaro396

iTrader: (14)

I'm kind of a newb at this EFI stuff. Can someone explain what they mean about putting the regulator "After" the rails?

sevanseriesta

iTrader: (34)

The regulator before the rails means, that the Main feed line from the tank goes to the regulator first. By after, means that the rails feed to the the regulator then back to the tank.

sevanseriesta

iTrader: (34)

See post 80 that is a after the rail setup.

This is almost a before the rail setup

Somebody09

Before the rail? As in, the fuel pressure regulator is before the rail? To me it appears as though fuel is fed via the rear of both fuel rails simultaneously, and the excesses is "tee"ed directly into the regulator.

Perhaps that's what you meant and I only misunderstood.

03 BUSA

iTrader: (25)

Speed inc rails. Ported Fast 92 with Bosch Series 3 42lb injectors.

98Camarod

iTrader: (43)

You carbing it or are you putting an elbow on there for some FI?

I never liked the color of the edlebrock rails, but arent you able to use them with E-85?

Bump for the thread, i just have stock rails.

sevanseriesta

iTrader: (34)

Hate to tell you this but if there are injectors in there then it is definitely not going to be a carb... Not to point out the obvious or anything!

Just messing with you by the way

Camaro396

iTrader: (14)

I'm using this 4500 carb style TB. Here is a picture of it when I set it on Trigger's carb'd motor.