fuel return dual tanks
Thread Starter
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Tuned
Joined: Feb 2013
Posts: 418
Likes: 37
fuel return dual tanks
Hello all,
I want to eliminate my vapor lock this summer once and for all. I just broke in my new motor and even in October i can see the fuel boil in the clear filter.
I was thinking of running the return to the rear tank and supply from the front. I would marry the two tanks together with a fuel line. The rear sits higher in the frame so i would tap the bottom of that tank and run it to the top of the forward tank. No more tank selector.
Cool fuel would pump from the front tank and hot fuel returned to the rear tank and then through gravity make it was back to the front tank. The downside i see is fuel possible sitting in the filler neck of the front tank.
Am I on crack or does this sound like a doable mod? I am/was a huge fan of mechanical pumps and they are on all my classics but the ethanol and boiling gas is getting to be a pain.
Chris
I want to eliminate my vapor lock this summer once and for all. I just broke in my new motor and even in October i can see the fuel boil in the clear filter.
I was thinking of running the return to the rear tank and supply from the front. I would marry the two tanks together with a fuel line. The rear sits higher in the frame so i would tap the bottom of that tank and run it to the top of the forward tank. No more tank selector.
Cool fuel would pump from the front tank and hot fuel returned to the rear tank and then through gravity make it was back to the front tank. The downside i see is fuel possible sitting in the filler neck of the front tank.
Am I on crack or does this sound like a doable mod? I am/was a huge fan of mechanical pumps and they are on all my classics but the ethanol and boiling gas is getting to be a pain.
Chris
Lead Driver
Joined: Nov 2006
Posts: 5,217
Likes: 506
From: Pa.
Hello all,
I want to eliminate my vapor lock this summer once and for all. I just broke in my new motor and even in October i can see the fuel boil in the clear filter.
I was thinking of running the return to the rear tank and supply from the front. I would marry the two tanks together with a fuel line. The rear sits higher in the frame so i would tap the bottom of that tank and run it to the top of the forward tank. No more tank selector.
Cool fuel would pump from the front tank and hot fuel returned to the rear tank and then through gravity make it was back to the front tank. The downside i see is fuel possible sitting in the filler neck of the front tank.
Am I on crack or does this sound like a doable mod? I am/was a huge fan of mechanical pumps and they are on all my classics but the ethanol and boiling gas is getting to be a pain.
Chris
I want to eliminate my vapor lock this summer once and for all. I just broke in my new motor and even in October i can see the fuel boil in the clear filter.
I was thinking of running the return to the rear tank and supply from the front. I would marry the two tanks together with a fuel line. The rear sits higher in the frame so i would tap the bottom of that tank and run it to the top of the forward tank. No more tank selector.
Cool fuel would pump from the front tank and hot fuel returned to the rear tank and then through gravity make it was back to the front tank. The downside i see is fuel possible sitting in the filler neck of the front tank.
Am I on crack or does this sound like a doable mod? I am/was a huge fan of mechanical pumps and they are on all my classics but the ethanol and boiling gas is getting to be a pain.
Chris
Laughing Gas
Joined: Aug 2010
Posts: 979
Likes: 40
From: Colorado Springs CO
I used to have a truck set up with 2 tanks & no valve...if the truck is parked, fuel will flow from the tank with more fuel to the tank with less fuel.
Why not just a 6 way switching valve?
Why not just a 6 way switching valve?
Lead Driver
Joined: Nov 2006
Posts: 5,217
Likes: 506
From: Pa.
Here are the lines with the mechanical fuel pump there is a electric fuel pump version as well.
Thread Starter
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Tuned
Joined: Feb 2013
Posts: 418
Likes: 37
Sorry i never closed this thread,,,
I ended up running a return to the front tank. I pulled the tank and welded a bung in the top.
I run off the main/front tank and when it is on E if needed i switch to the rear tank.. THe rear tank runs the motor and dumps the return into the front tank. The rear tank empties relatively fast and then i switch back to the main/front tank... It is not a perfect setup in that if you run the rear and the front is full, It can overfill the front tank... I do like having it manual,, If the 6 way valve failed,, it might also dump the fuel into the wrong tank????
Cheers, happy New Year,
Chris
I ended up running a return to the front tank. I pulled the tank and welded a bung in the top.
I run off the main/front tank and when it is on E if needed i switch to the rear tank.. THe rear tank runs the motor and dumps the return into the front tank. The rear tank empties relatively fast and then i switch back to the main/front tank... It is not a perfect setup in that if you run the rear and the front is full, It can overfill the front tank... I do like having it manual,, If the 6 way valve failed,, it might also dump the fuel into the wrong tank????
Cheers, happy New Year,
Chris
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