CK5
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dual tanks
- Thread starter deadman
- Start date
It's a pretty complex setup done right. No real easy way around it, although I think you could *probably* get creative and do something that didn't require a switch, valve, etc.
Perhaps a "normal" sending unit on the secondary tank, and adding a fitting for that to tie into on the primary tank would form a siphon as the primary tank was drawn down.
Perhaps a "normal" sending unit on the secondary tank, and adding a fitting for that to tie into on the primary tank would form a siphon as the primary tank was drawn down.
It shouldn't be hard to cob a complete setup off a junk yard rig.
Martin
Martin
You can certainly add one, but the switch, wiring, valve, and assorted lines and hoses (depending on year they were different) are a pain to remove and install, plus troubleshoot if something stops working right.
IMO if you can add capacity without adding any of the mechanical or electrical components you are far ahead. The way the dual tanks were implemented in the 73-87 trucks is overly complicated, at best.
Obviously those are my opinions, but based on swapping from early/carb setup to a later TBI dual tank setup, and having neither of them work properly, at least on the TBI, initially. Diagnosis, with the way they are wired factory, is near impossible. Your gas gauge doesn't work right. Is it the wiring, the tank sending unit, gauge, or switch?
In retrospect it's probably "overly complicated" because base was single tanks, and GM wanted to be able to plug and play dual tank options into what was standard vs. having to come up with an entirely separate integrated chassis wiring harness.
IMO if you can add capacity without adding any of the mechanical or electrical components you are far ahead. The way the dual tanks were implemented in the 73-87 trucks is overly complicated, at best.
Obviously those are my opinions, but based on swapping from early/carb setup to a later TBI dual tank setup, and having neither of them work properly, at least on the TBI, initially. Diagnosis, with the way they are wired factory, is near impossible. Your gas gauge doesn't work right. Is it the wiring, the tank sending unit, gauge, or switch?
In retrospect it's probably "overly complicated" because base was single tanks, and GM wanted to be able to plug and play dual tank options into what was standard vs. having to come up with an entirely separate integrated chassis wiring harness.
