LS1NOVA

iTrader: (12)

Setting up a fuel system, want to know if this is going to work good. The car is a 71 Nova with a 6.0 and single turbo. 600RWP on E85 so figure 900RWP for good measure due to the 30% more fuel needed.

--Fuel cell with 2 -8 outlets
--seperate -8 feed to pumps
--2 gss340 255 walbro pumps with seperate relays both always on.
--rear mounted 13101 regulator after the pumps to eliminate boiling the fuel
under severe street duty. Short -6 return to the top of the cell
--aftermarket filter of some sort (would a stock filter flow enough??)
--single -8 feed with a rail crossover with one end of the rail capped.

I know that most put the regulator after the rails due to more consistent pressure but I see some high hp cars over on Pro-touring running the regulator at the tank to avoid heating the fuel. This is a 95% street car so I need to avoid that at all costs.

See any issues I should deal with before ordering.

barnat

iTrader: (59)

If its stricky track? Yea ide leave both pumps on all the time too because the fuel isnt heated ALL the time like a daily driver, if you know what im getting at. but if street driven, just run the secound pump off of a vac hobbs switch so it only kicks on under boost conditions!Its less wear and tear on the heart of your ride which is the regulator!! Its just a diafram in there controlling everthing .That why i stepped up to a nasty kit with the magna fuel reg. Ive had 3 Aeromatives go bad on me in the past with my supercharged 95 Z28and didnt want to chance a head gasket with my now twin turbo ride !Heres my fuel setup
http://s243.photobucket.com/albums/f.../APs%20Engine/

405HP_Z06

iTrader: (11)

Here's some good information from Kinsler concerning the placement of the return line in the tank.

ak95ta

iTrader: (3)

I have mine ran like this
Fuel cell-->filter-->pump-->filter-->Y-->rails-->Y-->regulator-->Tank

10an through A1000 Split to 2 8AN to rails 2 6an to regulator then 6an to tank.

TheBlurLS1

iTrader: (8)

If the regulator is placed before the rails, it will not account for pressure drop across the rails.

LS1NOVA

iTrader: (12)

The blur--how do you explain the new Zo6 and other GMs having the fuel returning either in the tank or near the tank for nearly ten years? Fuel pressure seems steady in those??

I know how Aeromotive recommends it but not looking to do it that way.

Any others have personal experience returning the fuel before the rails?

Lonnies Performance

iTrader: (16)

That is because the GM Vette design is based on cost & for evaporative emissions purposes, not best performance. They will only work with moderate HP before it loses pressure due to the poor regulator location.

There is a reason why many high HP guys convert their late C5 Vettes to the 97 return style system.

Jim Craig

You also need to remember that with GM's returnless style, the computer is manipulating pump speed with voltage to keep fuel flow consistent with engine speed (consumption). There are a few "EFI Guru's" that prefer to place the regulator before the rails in aftermarket style systems -- but they are in the minority. You had also be running a bypass with the largest return orifice available so that you minimize the restriction back to the tank -- keeping the fuel a tad cooler.

Lonnies Performance

iTrader: (16)

Try again.... the computer does not control pump speed. They run 12v only.

The only GM's that do are some of the brand new flex fuel cars.

BLKHAWK1

iTrader: (30)

I have the same set-up but my reg. is pre rail not post. very streetable and has been now for two years with a 850 hp nitrous mtr.

TURBHOE

iTrader: (4)

i think the holden cars do something like this.