40083 Fuel Pump Help

[Joe C.]

Can someone let me know which of these is closest to original configuration:

http://www.corvette-paragon.com/memb...ads/v33-c2.pdf
part number 2932

http://www.ecklers.com/product.asp?pf_id=A3660&dept_id=1277

http://cgi.ebay.com/ebaymotors/CORVETTE-CHEVROLET-FUEL-PUMP-DELCO-40083-3-8-INLET_W0QQcmdZViewItemQQcategoryZ33555QQihZ020QQitemZ300238655814QQrdZ1QQsspagenameZWDVW

http://cgi.ebay.com/ebaymotors/1966-66-Chevy-Corvette-Fuel-Pump-New-GM-6415325-40083_W0QQcmdZViewItemQQcategoryZ34198QQihZ007QQitemZ170193192012QQrdZ1QQsspagenameZWDVW

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&viewitem=&ru=http%3A%2F%2Fsearch.ebay.com%3A80%2Fsearch%2Fsearch.dll%3Ffrom%3DR40%26_trksid%3Dm37%26satitle%3D300240110847%26category0%3D%26fvi%3D1&item=300240110847

Thanks in advance.

[Joe L.]

Re: 40083 Fuel Pump Help

Can someone let me know which of these is closest to original configuration:

http://www.corvette-paragon.com/memb...ads/v33-c2.pdf
part number 2932

http://www.ecklers.com/product.asp?pf_id=A3660&dept_id=1277

http://cgi.ebay.com/ebaymotors/CORVETTE-CHEVROLET-FUEL-PUMP-DELCO-40083-3-8-INLET_W0QQcmdZViewItemQQcategoryZ33555QQihZ020QQitemZ300238655814QQrdZ1QQsspagenameZWDVW

http://cgi.ebay.com/ebaymotors/1966-66-Chevy-Corvette-Fuel-Pump-New-GM-6415325-40083_W0QQcmdZViewItemQQcategoryZ34198QQihZ007QQitemZ170193192012QQrdZ1QQsspagenameZWDVW

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&viewitem=&ru=http%3A%2F%2Fsearch.ebay.com%3A80%2Fsearch%2Fsearch.dll%3Ffrom%3DR40%26_trksid%3Dm37%26satitle%3D300240110847%26category0%3D%26fvi%3D1&item=300240110847

Thanks in advance.

Joe---


I would say that the "Z11 Pacer" pumps are the closest to original but certainly aren't going to fool any competent judge. The Eckler's might be, too but I can't see enough of it.

[Dan H.]

Re: 40083 Fuel Pump Help

The Z11 Pacer pump only has 2 holes in bottom, got one from them and sent it back. Corvette Central has 40083 'rebuilt' units, got one and it leaked all over, sent it back! The partsladi one is fair. All will not be as good as a rebuilt original, but they ain't cheap!
Dan

[William C.]

Re: 40083 Fuel Pump Help

Pictures of originals if it will help, more available if you need them. Metal base was also used.

[Gary N.]

Re: 40083 Fuel Pump Help

There is a company out of California called Goat Hill that sells correct rebuilt fuel pumps. I used to see them at Corvettes of Carlisle every year. They were correct with the AC on the tower and the 40083 stamped on the pump. Someone here may be able to give you more information on them.

[Joe C.]

Re: 40083 Fuel Pump Help

Pictures of originals if it will help, more available if you need them. Metal base was also used.

Thanks Joe. I don't know what the "pacer pump" is, but Z11 has 2 versions posted on ebay store.

Dan. Look at the other version Z11 sells. It has "correct" 4 holes attaching cover:

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&viewitem=&ru=http%3A%2F%2Fsearch.ebay.com%3A80%2Fsearch%2Fsearch.dll%3Ffrom%3DR40%26_trksid%3Dm37%26satitle%3D300240110847%26category0%3D%26fvi%3D1&item=300240110847

Gary......have you dealt with Goat Hill lately? Were you satisfied?

Thanks Bill;those pictures are very helpful.

"Z11" sells two versions of the pump, and it looks like their unit with 4 screws holding the "pulsator" cover, is the best "bang for the buck".

When you say "metal base", you mean stamped steel/dichromate colored, right? If you have a picture of the stamped steel version, I would appreciate it.

I realize that nobody reproduces them with the A/C logo cast into both the top and the potmetal cover version. And that, AFAIK, nobody stamps "40083" into the casting, either. The part number appears on a metal tag. These differences are OK with me, and not worth paying for, in my application. I also don't see the reinforcing fins, nor correct shape of the pin boss on the upper casting of the repros.

Please look at the three thumbnails:
The third one is the original, showing the "inboard" ear as having a single hole.
The first one is the best Z11 version, which matches your original, with a single hole on the "inboard" ear.
The second one is an Ecklers offering, which shows the "outboard" ear having 2 holes.
Do you have a photo of an original, showing the configuration of the "outboard" ear? Does that ear ALSO have one hole, or does it have 2 holes, like the second thumbnail shows?

[Gary N.]

Re: 40083 Fuel Pump Help

Joe,
No I have not delt personally with Goat Hill. I would see them at some shows and they had pumps for sale and on display. I don't know about their reputation or the reliability of their pumps. They look good though. I will look for them at Corvettes of Carlisle this yesr. After searching for many years I actually found a brand new pump with the AC on the tower and the embossed number at a swap meet. It's on my car now. I also bought a rebuild kit from Paragon for my old original pump, but haven't tried to put it in yet. I don't know how hard it is to install the kit either. Good Luck

[William C.]

Re: 40083 Fuel Pump Help

More pics, including stamped bottom. Frankly, I'd try for the "real deal", as Corvette parts go, the 40083 isn't that hard to find, and the repros stick out like a sore thumb. The cast top on the 40083 is magnesium, which is why they darken so quickly with age.

[Dan H.]

Re: 40083 Fuel Pump Help

Joe, when dealing with Goathill, do it in person at a swapmeet, cash and carry. Wouldn't advise getting into a 'mail order' deal with them, can be very slow!!!! I did get a second Z11 pump, used it, it weeped oil out the vent hole, have a beautiful original one from Andy Carnizzo now, it's perfect! The real ones are the only way to go!!!!!!
Dan

[Mike M.]

Re: 40083 Fuel Pump Help

If you can get a kit, rebiuild your original, nothing to it!
I was not able to see the AC logo on the repops, deductions for sure, depending on the year, if absent the pump could be subject to a total deduction.
HaND

[Gary N.]

Re: 40083 Fuel Pump Help

Mike,
Have you rebuilt one of these pumps? Any special tools needed? The rebuild kit has no instructions with it. Any pointers.

[Gary N.]

Re: 40083 Fuel Pump Help

Dan,
I had two brand new of the Z-11 style pumps and both weeped oil out of the vent hole. Made a mess with oil all around the pump area.

[Mike M.]

Re: 40083 Fuel Pump Help

WOW, Gary, I didn't realize there was to be a memory test today.
It has been awhile, but, pretty straight forward as I recall with basic hand tools.
Remove the old, reverse procedure with the new.
I'm not sure if the original diaphram was sealed at the outer edges, but, I applied gasket sealer anyway.
Perhaps someone can jump in with a more scientifically detailed approach.
HaND

[Joe C.]

Re: 40083 Fuel Pump Help

Mike,
Have you rebuilt one of these pumps? Any special tools needed? The rebuild kit has no instructions with it. Any pointers.

Gary,

Looks very straightforward as far as rebuild. Only minor skill would be involved IF you R&R the 2 check valves in the center section.........they would have to be re-staked in place. Also, in looking at Bill's picture of an original pump, the arm rivet looks to be copper or brass, and some care would be required in reproducing the proper "X" mark on that rivet, if, in fact, that is an original rivet. I assume that Bill's excellent photos show pumps that have never been rebuilt.

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Mike,

I wish that I had an original pump to rebuild!

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Dan,

Yes....I was fairly certain that it was Goat Hill that I was leery of. Now that you confirmed my suspicions, I'll only deal "in person". Wonder iffen they'll do a C.O.D. deal?


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Here's how this whole thing started:

When I bought my Corvette, in 1999, and before I restored it, the installed fuel pump was clean, and had obviously been replaced not very long before. It looks EXACTLY as pictured in the attached thumbnail..........the "incorrect" offering from Z11, with the 2 hole pulsator cover. It looked like a good, functional replacement, and has a "40083" tag affixed, so I decided to clean the outside and install it as-is. It is one of a "handful" of components that went into the restoration after a mere cleanup.

Dyno test of my engine shows it to "lay-down" somewhat prematurely, reaching peak power @ about 5300RPM, rather than 6200-6500 as it should.

Fuel pump pressure test shows about 5 psi at idle. By the time it reaches 4500 RPM, it drops to about 3 PSI. Spec calls for 6.5 - 7.5 PSI @ idle. After temporarily removing the fuel filter, checking the tank vent, and being certain that the fuel pickup "sock" in the tank is clear, I want to eliminate ANY possibility of a fuel starvation problem, before I remove the engine for a planned overhaul.

Thanks again to all who responded, and sorry for the long post. I am a "stickler" for background info, in order to enable a proper response.

Joe

[Gary N.]

Re: 40083 Fuel Pump Help

Mike,
Now that I'm in my 60's memory is the second thing to go!!! I've found that asking questions might save me from making a mistake that someone else might have made, so if I find an "expert" I like to use them as a resource.