Fuel system questions
Thread Starter
Joined: Jan 2003
Posts: 949
Likes: 0
From: New Germany, MN
Car: 1986 Iroc
Engine: 5.3
Transmission: 4L80E
Axle/Gears: 9 Inch w/ 3.55
Fuel system questions
I am looking for some feedback on my fuel system. I will be running a 406 with a T76 turbo looking to make about 500-600 whp.
Dual 255 intake fuel pumps (Already own one so I will just need one more pump)
-08 Feed from fuel tank (Already own and is installed on car)
-06 Return line (Again already own and have installed on vehicle.)
Aeromotive Fuel Pressure Regulator (http://store.summitracing.com/partde...5&autoview=sku)
Two -06 feed line to each fuel rail.
I was also thinking of installing a boost switch for the second fuel pump. That way the pump will run after 2-3psi of boost.
Any opinions are welcome. From what I have read on ls1tech is that dual pump cars are making some 900 whp. So I figure I will be fine.
Dual 255 intake fuel pumps (Already own one so I will just need one more pump)
-08 Feed from fuel tank (Already own and is installed on car)
-06 Return line (Again already own and have installed on vehicle.)
Aeromotive Fuel Pressure Regulator (http://store.summitracing.com/partde...5&autoview=sku)
Two -06 feed line to each fuel rail.
I was also thinking of installing a boost switch for the second fuel pump. That way the pump will run after 2-3psi of boost.
Any opinions are welcome. From what I have read on ls1tech is that dual pump cars are making some 900 whp. So I figure I will be fine.
Thread Starter
Joined: Jan 2003
Posts: 949
Likes: 0
From: New Germany, MN
Car: 1986 Iroc
Engine: 5.3
Transmission: 4L80E
Axle/Gears: 9 Inch w/ 3.55
Re: Fuel system questions
Maybe this is something I am going to have to try and see if it works.
Supreme Member
iTrader: (2)
Joined: Jul 2005
Posts: 1,079
Likes: 0
From: currently Jacksonville NC
Car: 91 z28
Engine: 383 sbc, 88mm turbo a2w IC, CSU 750
Transmission: th-400 PTC 4000 stall
Axle/Gears: ford 9" 3.55 gear
Re: Fuel system questions
you're setup sounds great. The hobbs switch to trigger the second pump is a good idea, especially if its a street car and you arent in boost all the time.
Thread Starter
Joined: Jan 2003
Posts: 949
Likes: 0
From: New Germany, MN
Car: 1986 Iroc
Engine: 5.3
Transmission: 4L80E
Axle/Gears: 9 Inch w/ 3.55
Re: Fuel system questions
I have seen someone else on the board do this. The only problem he was having was fuel pressure going to high when the second pump came on. I am willing to bet that his fuel return was just not big enough.
Member

Joined: Jan 2007
Posts: 206
Likes: 0
From: Huntley, Il
Car: 89 ws6
Engine: 355 afr195, hsr,gmpp cam, hs rr,
Transmission: t-5
Axle/Gears: 3.08
Re: Fuel system questions
That is very possible. Your -6an line should be more than sufficent return size. I had pondered doing the exact same thing like they do on grand nationals where they are mounted together in the tank. is your tank sumped?
Thread Starter
Joined: Jan 2003
Posts: 949
Likes: 0
From: New Germany, MN
Car: 1986 Iroc
Engine: 5.3
Transmission: 4L80E
Axle/Gears: 9 Inch w/ 3.55
Re: Fuel system questions
No my tank is not sumped. Thats why I am trying something different. My 4 inch exhaust would make it hard to get the tank sumped.
Member

Joined: Jan 2007
Posts: 206
Likes: 0
From: Huntley, Il
Car: 89 ws6
Engine: 355 afr195, hsr,gmpp cam, hs rr,
Transmission: t-5
Axle/Gears: 3.08
Re: Fuel system questions
i guess you could be able to do it or get the unit from someone who offers it. I was given a phone number for a guy who might be able to from Jack Cotton. I like that you are splitting to the fuel rails although if you didn't you should still be fine.
Last edited by shocker89bird; Jan 22, 2008 at 12:52 PM.
Trending Topics
Thread Starter
Joined: Jan 2003
Posts: 949
Likes: 0
From: New Germany, MN
Car: 1986 Iroc
Engine: 5.3
Transmission: 4L80E
Axle/Gears: 9 Inch w/ 3.55
Re: Fuel system questions
If someone offered a sending unit I would really consider buying it. I am probably going to cut and weld mine to hell in order to get what I want.
Thread
Thread Starter
Forum
Replies
Last Post
9192camaro
Engine/Drivetrain/Suspension Parts for Sale
16
Feb 3, 2019 12:21 AM





