BOOSTAT4500

iTrader: (17)

I'm running a 408 with a d-1sc at about 7lbs. Right now I have a 255L inline pump and a KB boost-a-pump added on. I start dropping pressure at about 4500rpm and 500rwhp. The tuner says a bigger in-tank ( single 255L ) is all I need to add. Right now I'm only trying for 600rwhp but plan on adding boost this winter. What do I need to support 700rwhp? How much will the stock lines and rail support? Thanks!

PurEvl

iTrader: (2)

fuel
Walbro 340l intank -single
-8 feed to Nasty fuel rail's
Aeromotive regulator set at 52 PSI -line off
-6 return
60lb Motrons

MEAN LT1

iTrader: (2)

Several people have have ran dual intank pumps using Walbro high pressure fuel pumps. One stays on while the other kick in via a hobbs switch and boosts fuel pressure as needed.

BOOSTAT4500

iTrader: (17)

O yeah, I also have 60lbs. mototrons. Are the dual setups sold as a kit with the switch or are they custom deals? Would it work to just wire them both on at all times?

69firebird

iTrader: (14)

well I have a sumped tank
aerotmotive a1000 fuel pump
-8 up into speed inc rails
-6 into CAS regulator
stock lines back to sump
hoping im not going to have hte cavatating problems most do with the a1000, if so Ill add a fuel cooler to help correct
need to also get the voltage regulator from aeromotive
ed

cablebandit

iTrader: (37)

I think you need dual walbro pumps. You can do this yourself like I did or get one from Racetronix. You won't need a B_A_P with dual walbros. The mototron 60# are good for well over 700rwhp as shown by Mightymouse.

MEAN LT1

iTrader: (2)

Yes, racetronix would be the compnay to get ahold of for the dual walbro setup.

Racetronix

iTrader: (2)

700RWHP requires a well designed DP system.

Slowhawk

iTrader: (12)

Your problem is the stock fuel lines/rails. 5Liters car has a feed/return setup with regulator.Stopped his fuel problem The stock feed line just can't hold enough fuel.

NA$TY-TA

iTrader: (21)

The HP we see with a blower and a turbo are 2 different things.... with the same Injectors...... A turbo is more efficent then a blower and the HP you see at the rear wheels might be the same but the HP the motor is eating is not seen with a turbo like it is with a blower...... The motor is turning the blower and is taking HP to do that so the injector will need to be bigger with a blower motor to reach the same HP as a turbo........
Kyle

Racetronix

iTrader: (2)

No, it is the regulation point.

Read from top to bottom and learn:
https://ls1tech.com/forums/showthrea...ght=Racetronix

Slowhawk

iTrader: (12)

Sorry I learned by running into the problem then fixing it with what we did

I'm sure your way works great,just posted how we beat the problem,now running lower fuel pressure with some room to spare

Pro Stock John

iTrader: (34)

Dual intanks sound like a good idea.

Or you could run aftermarket stuff for the rails, fuel line, regulator and tank.

I currently run a Speed Inc. gas tank and some aftermarket rails. I run one external Weldon 2025 pump right now. I am probably going to dual Bosch pumps from Speed Inc. very soon. Those would again be dual external pumps.

Racetronix

iTrader: (2)

Yes, every Weldon pump should come with a bottle of Asprin and ear plugs.
They work well though.

ls1290

iTrader: (20)

- Racetronix C5 Intank Fuel Pump
- Kenny Bell Boost-A-Pump
- -8an send line
- -6an return line
- CB Performance Hard Line Adapters
- Speed Inc Billet Fuel Rails
- CAS Billet Fuel Regulator
- 75# RC Engineering HI Fuel Injectors

Good for a 1000 rwhp.

MIGHTYMOUSE

iTrader: (59)

home made twin in tank gss340's
-8 to speed inc BIG filter
-8 up to speed inc rails
-8 crossover
-6 to cas regulator
stock pressure line back to the stock tank
mototron 60's set to 50psi with the vaccum off & goes up 1psi/psi boost

*edit* both pumps run all the time off of one radio shack 30A relay w/ fused link to the accessory terminal under hood. stock pump power wire triggers relay to ON.

cablebandit

iTrader: (37)

David, next time you are under that car, check that relay. Mine melted eventually running both pumps from one relay. Could just be me but would hate for ya to get stuck because of it. I could only tell because one of the "legs" wobbled. I was alerted to the problem because the pumps wouldn't turn off when I removed the key The B_A_P comes in the one/two pump flavors...the two pump model is a 40amp unit and the one pump model is 20 amp I believe.....something to think about.

MIGHTYMOUSE

iTrader: (59)

has been like this for nearing a year now.. i switched from a two relay set up because one of them melted.. turned out to be a bad ground... something to think about

cablebandit

iTrader: (37)

AHA!! Maybe you are right......... but I did check the ground When are you going to run mid 9s....I see you got the mph for it...something new to think about

Racetronix

iTrader: (2)

Either a cheap relay or a non-Weatherpack version. We have never had a problem like this with the Siemens (now Tyco) 40 amp W/P relays.

Our DP harness has a dedicated relay and fuse for each pump so they can be controlled independently.