I'm about ready to install an electric fuel pump on another one of my '64 Daytona v8's. In the past, I've continued to use the mechanical pump, and turn on the electric when needed on the other Studes I've done. However, I think I may be overcomplicating the job, and I'd like some input from you.
I've been splitting the line off the fuel tank. One branch's routing goes to a filter, then to a frame mounted electric fuel pump, then to a one way flow check valve, then to a brass tee.
The other branch off the tank goes to another check valve, then to the other leg of the tee. The third leg of the tee connects to the steel fuel line that runs along the frame and up to the mechanical fuel pump. The reason for this complex sounding routing is this: In the event of an electric fuel pump failure that would not allow fuel flow through the electric pump, there must be another route for the mechanical filter to obtain gas. That's why we have the second branch off the tank with only the check valve. Fuel can be sucked thru that line by the mechanical pump.
The check valves are in place so that the electric pump does not just pump fuel thru the tee and back into the tank. This complicated plumbing arrangement was suggested to me by a presumably knowledgeable parts store counter man some years back. I've done 3 or 4 systems this way, but I don't really want to do it again unless I'm convinced it's necessary. It's time consuming to install, and there's a real bird's nest of tubing and bracketry back by the tank, looping around amongst the tailpipes, etc. Pretty ugly, matter of fact.
I'd rather opt for just a rubber line coming off the gas tank outlet, to a filter, then an electric pump, then to the chassis steel fuel line. Much cleaner and less complex. But that "knowledgeable" counter man said no.
Maybe his thinking had something to do with the type of electric fuel pump I was getting at the time. I don't remember which kind it was .... rotary or vane or solenoid or this or that. Maybe that had an influence on his advice. Lately I've been using Airtex
E 8012S electric fuel pumps, but I don't know what "type" they are. Are they of the kind that will let fuel continue to flow thru them in the event of their failure, or not? I don't know. So, I guess my quest for advice might hinge on a respondent's knowledge of what characteristics a failed fuel pump's flow would likely be. Any advise?
Thanks,
Larry
I've been splitting the line off the fuel tank. One branch's routing goes to a filter, then to a frame mounted electric fuel pump, then to a one way flow check valve, then to a brass tee.
The other branch off the tank goes to another check valve, then to the other leg of the tee. The third leg of the tee connects to the steel fuel line that runs along the frame and up to the mechanical fuel pump. The reason for this complex sounding routing is this: In the event of an electric fuel pump failure that would not allow fuel flow through the electric pump, there must be another route for the mechanical filter to obtain gas. That's why we have the second branch off the tank with only the check valve. Fuel can be sucked thru that line by the mechanical pump.
The check valves are in place so that the electric pump does not just pump fuel thru the tee and back into the tank. This complicated plumbing arrangement was suggested to me by a presumably knowledgeable parts store counter man some years back. I've done 3 or 4 systems this way, but I don't really want to do it again unless I'm convinced it's necessary. It's time consuming to install, and there's a real bird's nest of tubing and bracketry back by the tank, looping around amongst the tailpipes, etc. Pretty ugly, matter of fact.
I'd rather opt for just a rubber line coming off the gas tank outlet, to a filter, then an electric pump, then to the chassis steel fuel line. Much cleaner and less complex. But that "knowledgeable" counter man said no.
Maybe his thinking had something to do with the type of electric fuel pump I was getting at the time. I don't remember which kind it was .... rotary or vane or solenoid or this or that. Maybe that had an influence on his advice. Lately I've been using Airtex
E 8012S electric fuel pumps, but I don't know what "type" they are. Are they of the kind that will let fuel continue to flow thru them in the event of their failure, or not? I don't know. So, I guess my quest for advice might hinge on a respondent's knowledge of what characteristics a failed fuel pump's flow would likely be. Any advise?
Thanks,
Larry
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