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I did nothing exotic - the pump pushes fuel straight through the mechanical pump to the carb with all original plumbing. The only part of any fuel line or component touched was placing the setup above in place of the 8" rubber tank-to-hardline portion... (there is a fuel filter just before the added electrical pump you can see in the above pictures; the WCFB carb also has its own internal sintered bronze fuel filter in the fuel inlet housing)
This made the job simple with the worst part being running switched 12V for the pump to the rear of the car....
The mechanical pump has no idea its getting a 'boost' from the electrical pump....the internal diaphragm, springs and popitt valves cycle merrily away just as designed...
You could install a mechanical pump block off plate and go straight to the carb with the electrical pump and run it full time. Some have even "gutted" the mechanical pump and routed a straight "pass through" arrangement to disable the mechanical pump and use the electric pump fuel time but keep the original "look"...
There is no return line needed for the pump and its pressure is 4.5 to 6.0 - perfect for our cars. I used it twice this summer....I can't swear it was vapor lock but the car started to stumble in traffic and I wasn't going to wait for full blown symptoms, so I hit the cockpit switch and the problem completely disappeared both times.
Frank
so you dont use it all the time and the mech pump will suck the fuel through the electric pump ? thats why the switch correct ?weve been getting some serious florida weather here on the cape for the last month , hot and extremely humid and my car has stubled and failed and had issues with no start when hot , for the money i think this might help eliminate or at least identify one of the symptoms im having hopefully.
The electric pump has an internal one way valve - and yes, the original mechanical pump will suck fuel through the electric pump without a bit of problem..
Prob should be a separate thread but there are some CONS to using the electric pump; they are solvable but add complication, namely:
a) without an oil pressure cutoff switch the pump will continue to run in a rollover crash if there is power to it and increase fire potential a bunch....a mechanical pump will stop its action when the engine stops, and,
b) if the mechanical pump's diaphragm should fail....the electric pump will still run pumping fuel into the crankcase and you could gall cylinders or worse with diluted oil....
Admittedly, very rare (really rare) situations. I choose to limit the electric pump use to just "as needed" to keep those probabilities to nearly an insignificant percentage of my driving time.
Hence, the manual switch!
Last edited by Frankie the Fink; 08-18-2018 at 10:26 AM.
The electric pump has an internal one way valve - and yes, the original mechanical pump will suck fuel through the electric pump without a bit of problem..
Prob should be a separate thread but there are some CONS to using the electric pump; they are solvable but add complication, namely:
a) without an oil pressure cutoff switch the pump will continue to run in a rollover crash if there is power to it and increase fire potential a bunch....a mechanical pump will stop its action when the engine stops, and,
b) if the mechanical pump's diaphragm should fail....the electric pump will still run pumping fuel into the crankcase and you could gall cylinders or worse with diluted oil....
Admittedly, very rare (really rare) situations. I choose to limit the electric pump use to just "as needed" to keep those probabilities to nearly an insignificant percentage of my driving time.
You seem to active to have only one. Are you sure there is not another C2 in your future? Seems like a 67 would be a good fit for you.
Barry
One car guy for the foreseeable future.....I had a 61 dual quad as a second Corvette but let it go finally after 10 years for strong money...time will tell...
Pulled original #s engine out of the '66 today...getting ready to install NEW 383 Stroker (440HP/483FT LB)
Need to move few item from old to new...Intake, Holley Sniper EFI, Front Runner Serpentine, Valve covers, ????
Also installing side pipes..200-4R overdrive and a few other goodies.
The final day of sanding (until cut and buff time). It's ready for sealer/base/clear. I'll take a few days to morph my shop into a spray booth. I know it doesn't compare to others projects but I change my own oil as well.
Swapped out my valve covers for better breathers and fixed my brake lights on my 60. One of the wires on the brake switch was just a bit short and it really stretched to plug into the switch. Added about 5” and tucked the excess up and out of the way.
loaded it up in my trailer for trip to Carlisle tomorrow, with Wednesday set up day in building T. If anyone is there please stop by and say hi!
Retired in 2013 NY State Police 32 years. Went back to work for a local District Attorney's office since. May pull the plug next year. Cleaned up the garage for the '65. It's been in the shop for the last 6 weeks. Rebuilt the motor. Kept the born with block. Still have a few weeks of summer left in upstate N.Y.
Went to the Flashlight Drags yesterday with my 60. Raced 10 times won 5 of them . Car ran great till eliminations then decided enough, did my burnout pulled up to the starting line and the starter came up to me told me to shut it off as he was holding up my shredded fan belt. Oh well , had a great day at the racetrack (airport) , beautiful weather. Raced a bunch of cool cars, even a 91 Vette with a big turbo pipe out the side of it, had him beat till he got the turbo spooled up. Too busy racin to take any pics but I think the photog got some shots of me , when I see em I will post em.
Retired in 2013 NY State Police 32 years. Went back to work for a local District Attorney's office since. May pull the plug next year. Cleaned up the garage for the '65. It's been in the shop for the last 6 weeks. Rebuilt the motor. Kept the born with block. Still have a few weeks of summer left in upstate N.Y.
At some point you have to decide that your ever-more-precious time is more important than a bigger bank account......
I walked away from big consulting paychecks at 65 and haven't regretted it a bit and want for nothing.
Hi Frank, I enjoy your posts each night. Very informative and interesting. I'm 63 and still enjoy my partners at work. Once it's not fun, then I'll know when to tell the Boss he needs to look for another investigator. Stay healthy and keep the posts coming. Sully
Got the 60 dropped off and set up in building T at Carlisle...stop by and say hi! I have my book on the build that will be available to look at that shows from start to finish of the build available as well.
Since my C1 is still a long long way off I took my 66 GTO convertible to the assisted living facility where my mother in law is a resident. I took anyone there that wanted to go for a ride. As I was leaving a guy that was visiting asked what motor was in it. I told it was an LS computer controlled. He says well if you'd left it all stock it would be worth something. I should've asked if he was a member of Corvette Forum. Lol
The gear pump on the fuel meter of my 63 FI unit developed a small leak last year. The leak has been getting worse recently. After driving, the fuel meter would obviously be full. It would then start to leak through the pump seal and shaft. After about 8 hours, I'd smell gas in the garage. I'd go out and sop up a little puddle laying on the RT rear of the adapter plate. Eight hours later... REPEAT. It would leak till there was no more gas in the fuel meter...
SO, I pulled off the unit, removed the gear pump, and sent it out to be "re-shafted and re-sealed". Should have it back early next week. Removing the unit has given me the opportunity to do some clean-up too.
About a month previous to this, I changed spark plugs...for the first time in 10+ years. Ohm'ed my wires. All were OK. One of our forum members, who is a neighbor of mine offered to run my distributor on his Sun Machine. I pulled it... gave it to him, and he put in new points/condenser and "tuned" my vacuum and centrifugal advance systems...
Car is running great.. It's HOT in Florida this time of year. Virtually zero outdoor activities, especially car shows, cruises, etc. so this is a good time to get this type of work done.. Things will start rolling again in September and October, when it cools down. JUST the opposite of living "up North".
08-18-2018, 08:34 AM
It would leak till there was no more gas in the fuel meter...