Boost and dual tanks
Thread Starter
Joined: Sep 2007
Posts: 4,188
Likes: 292
From: woodbine, md
Boost and dual tanks My C10 has dual tanks, working on diff ideas to use them-I looked at diff options, like a rear
mounted one, but with lowering it, the space I have could interfere with the rear end.
I thought if I could replace the 3/8" line with 1/2", install a return in each tank, might work. I
found a 6 way brass valve, pretty large, might work-each tank would need ind. return/feed.
Another thought was use a smaller tank in the rear, use it as a main tank, use the 2 other tanks
to feed it by a man. operated pump-I could swap tanks with the fac. valve.
Just trying to use the ex. system, I think it would be to rest., esp the switcher valve-they made
a 6 way valve for the later FI trucks. Anyone try something like this, 2 tanks
mounted one, but with lowering it, the space I have could interfere with the rear end.
I thought if I could replace the 3/8" line with 1/2", install a return in each tank, might work. I
found a 6 way brass valve, pretty large, might work-each tank would need ind. return/feed.
Another thought was use a smaller tank in the rear, use it as a main tank, use the 2 other tanks
to feed it by a man. operated pump-I could swap tanks with the fac. valve.
Just trying to use the ex. system, I think it would be to rest., esp the switcher valve-they made
a 6 way valve for the later FI trucks. Anyone try something like this, 2 tanks
TECH Enthusiast
Joined: Dec 2017
Posts: 676
Likes: 72
We tried this on my buddies c10 a few years ago. It worked ok till we started turn8ng it up then the valve started being a restriction internally if you can get a bigger valvr or even better go with your surge tank idea i dont see why it wouldnt work.
TECH Resident
Joined: Sep 2013
Posts: 993
Likes: 119
From: Mechanicsburg, PA
X2 Surge tank fed by a set of stock 1987 TBI electric in tank pumps. You'd just have to figure out how to split the return from the surge tank to each stock tank when your using that fuel.
i ls swapped a 85 c10 a few years back. I used an inline pump right after the original dual tank fuel valve. Kept both original saddle tanks. Truck is still running to this day without any fuel pump issues.
U could swap to the 87 c10 model intank pump if u choose. I think your best option is a surge tank that is fed by a pump after the valve from both tanks. Basicly like I stated above ^^.
U could swap to the 87 c10 model intank pump if u choose. I think your best option is a surge tank that is fed by a pump after the valve from both tanks. Basicly like I stated above ^^.
I was thinking of this on my swap, using the two tbi pumps already in each tank, through the stock selector valve, then fed into a single in line Walbro 255, then to a Wix 33737 filter/regulator, etc
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TECH Resident
Joined: Sep 2013
Posts: 993
Likes: 119
From: Mechanicsburg, PA
The surge tank would probably be necessary to keep the system fed under load. Those stock pumps don't move much fuel. It would be interesting to see how far you can push (or rather pull through) one.
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Verdad Gallardo Thread Starter
Joined: Sep 2007
Posts: 4,188
Likes: 292
From: woodbine, md
This is an old post, what I ended up doing was getting 2 new 87 tanks since they had built in
sumps for in tank pumps, use 2 87 senders, add a 450 pump to each, then use the large brass
man. valve, then a #10 feed, 8 return to /from the valve. I used a 3 way switch to switch pumps,
senders for the gas gauge. I dont have the injs. to run E85 yet, but thinking was I could run E85
in one tank, or at least a lower mix. For now its a great back up if one pump fails, lol.
sumps for in tank pumps, use 2 87 senders, add a 450 pump to each, then use the large brass
man. valve, then a #10 feed, 8 return to /from the valve. I used a 3 way switch to switch pumps,
senders for the gas gauge. I dont have the injs. to run E85 yet, but thinking was I could run E85
in one tank, or at least a lower mix. For now its a great back up if one pump fails, lol.