Fuel System Help
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 793
Likes: 1
Fuel System Help
Im trying to plan out a fuel system for my my 600rwhp build. I was originally planning on a duel in talk Walbro 255 setup and not using the Magnavolt BAP that came with the supercharger kit. However I went a little over budget on my build and I don't really have the money for it if it is not absolutely necessary. My question is should I still upgrade the stock pump to a single Walbro 255 and use the Magnavolt BAP along with it? Can the Magnavolt handle the new bigger 255 pump? Or should I just stick with the stock pump and the BAP?
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
The stock pump and BAP has proven to be good at that level but if you're planning on dropping the tanks anyway then do twin Walbros. Either that or a Z06 bucket. But I wouldn't drop the drivetrain and tanks just to do this alone, do a clutch at the same time.
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 793
Likes: 1
It would be easy for me to drop the tanks because I already have the rear cradle out for a diff swap. In the long run I do plan on doing twin Walbros, Im going to do one in each tank actually, however at this point I don't really have the budget for it. My question is should I go ahead and swap out the factory pump for a Walbro 255 and more importantly can the Magnavolt handle the Wablro?
Last edited by Bad News; Mar 26, 2010 at 01:17 AM.
Burning Brakes
Joined: Jan 2007
Posts: 895
Likes: 0
From: Pasadena TX
Sorry to put it like this. If the $220 for two pumps is breaking the budget. Get a cheaper hobby. You realy don't want to short yourself on the fuel side of a build. You should be fine at 600 with a BAP, Racetronics fuel pump hairness and the stock pump.
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 793
Likes: 1
$220 is not breaking my budget. If I did a twin Walbro setup I would put one in each tank and run a return style system. After the pumps, regulator, fittings, and fuel line I would be another $650 into it. Trust me I know this is not a cheep hobby. Im already $14k into my build and trying to wrap it up. I plan on going to the twin Walbro setup later down the road. Should I go ahead and replace the stock pump with a Walbro now and supplement it with the bap? That way I have at least one of the pumps out of the way. Or should I just leave it alone and run the stock pump with BAP and do it all later? I know fueling is one of the most important things and I don't want to skimp on it. That is why I am trying to get as much input as possible.
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Burning Brakes
Joined: Jan 2007
Posts: 895
Likes: 0
From: Pasadena TX
$220 is not breaking my budget. If I did a twin Walbro setup I would put one in each tank and run a return style system. After the pumps, regulator, fittings, and fuel line I would be another $650 into it. Trust me I know this is not a cheep hobby. Im already $14k into my build and trying to wrap it up. I plan on going to the twin Walbro setup later down the road. Should I go ahead and replace the stock pump with a Walbro now and supplement it with the bap? That way I have at least one of the pumps out of the way. Or should I just leave it alone and run the stock pump with BAP and do it all later? I know fueling is one of the most important things and I don't want to skimp on it. That is why I am trying to get as much input as possible.
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 793
Likes: 1
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
The other tank is just used for extra capacity and to balance the weight of the fuel. The pump in the passenger tank is just to send fuel back over to the drivers side tank for balance purposes. Billy (MachineWorks) and his partner have pioneered the twin Walbros in the stock bucket in the drivers side tank. The drivers side is where all the work is done. IMO replacing the stock pump with a single Walbro is not worth the effort. Two Walbros and the associated submersible fuel hose, connectors and such total well under $250.
Burning Brakes
Joined: Oct 2005
Posts: 791
Likes: 2
From: Stafford Virginia
I like the idea of the ease of just putting twin 255's in the one tank, but what about the excessive heat from constanly running 2 pumps full time, even when at idle and low speeds. I'm not sure just how much heat a system like that would generate, but it has to have at least some negative heating affect. My 928s actually runs the fuel through the ac system to try combat heat. Is there anyway to run the second pump off some type of demand sensor? I guess then the problem would be running a new set of wires into the tank for the second pump without the fuel wicking back up the wire, causing a possible leak...
Maybe I'm over thinking this whole thing...
Maybe I'm over thinking this whole thing...
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
Here is a CF thread with links to LS1Tech and other sites with various dual pump pics and writeups. Lots of the F-Body guys wire the second pump into a hobbs switch to only start pumping under boost. For your purposes you could use a window switch.
http://forums.corvetteforum.com/c6-f...uel-pumps.html
you would have to drill a hole in the hop of the fuel pump hanger to run some more wires and then seal it up with your goop of choice. The C5 fuel tanks have the hole for the hanger/bucket at the top unlike the C5's so I don't think there is much cause for concern about a leak there.
http://forums.corvetteforum.com/c6-f...uel-pumps.html
you would have to drill a hole in the hop of the fuel pump hanger to run some more wires and then seal it up with your goop of choice. The C5 fuel tanks have the hole for the hanger/bucket at the top unlike the C5's so I don't think there is much cause for concern about a leak there.