Just an FYI... As you know it's hard to find an Olds 394 fuel pump, after hours of research I found that a fuel pump for 77-78 Buick V6 (AC # 41209) will work. The only modification is to drill the 5/16" mounting hole to 3/8" and bolt it on. I hope this helps out.
You should post it over on the classic olds forum too, theres a few over there that would be interested. In some year cars it wouldn't work because the fuel pump is also a vacuum pump needed to operate the heater box. In a hot rod setup it is a good choice then.
Umm, what is your 394 in? I got excited and got one too, but I doubt it will fit my car, a '61 olds 88. It looks like the crossmember is in the way of the pump inlet/outlets
Well I run a blue holley to the carbs on mine, but if I was running a mechanical this is very good info. Now if I could just find a good solid '61 Starfire to bolt my behemouth into I would be tickled pink.
From Fusick Dual Action Fuel Pumps: Rebuilding 1961-62 (6585 AC), and 1963-64 (6620 AC) only. Core charge for fuel pumps is 125.00. These pumps are normally in stock for immediate shipment. 6585 1961-62 Fuel Pump 115.00 6620 1963-64 Fuel Pump, cars without air conditioning 115.00 6620A 1963-64 Fuel Pump, cars with air conditioning 115.00 Phone: 1-860-623-1589 Phone: 1-860-623-1583 M-Th 8:00 AM to 5:30 PM Fri 8:00 AM to 5:00 PM Sat 9:00 AM to 12:00 Noon
I got the pump, and it bolted right on without even having to hog out the holes. The only problem is that the actuator arm doesn't seem to contact the cam lobe. It's not pumping any fuel. Did you pop out the pins on the original and swap the original arm over? There are two styles, one with a straight arm and the other with angled arm. I got the angled one. The straight one doesn't look like it would come even close to hitting the cam. Any suggestions?
The 394 fuel pump design changed in 1963. The Buick pump will fit 1962 and earlier. Found out the hard way. Now looking to have my mech pump rebuilt with proper materials (this ethanol fuel is crap!) or try to find a quiet electric fuel pump that won't overheat. What a pain!
Just an FYI to anyone else who finds this thread. This pump also worked on the 324 Olds in a 1956 Super 88. Had to hog the holes out to 3/8" and run new lines to/from it, but it fits and works fine as long as you don't need the vacuum pump. Found the pump for $14 at rockauto by searching the AC part number, other places had them as well for cheap.
I’m hoping this pump will work in my buddy’s 63 dynamic 394. He’s short on cash and trying to get it drivable after 7 yrs. Can anyone verify whether it’ll work?
Seems it was mentioned it works for ‘62 and earlier. A few posts above yours says there was a design change in ‘63.
The one in my '64 Olds crapped out in 1973 and the replacement was the crimp type. The OG one had the glass bowl. I would say that the new crimped pump also had a few or more GM applications.
In instances like this where there is an expensive fuel pump I've found the best solution is to just block it off and use a basic electric pump. I've had excellent luck with the Carter 4070, which is like $45 on Amazon. The benefits of the electric pump outweigh any negatives IMHO; instant fuel pressure for easier starts, flexibility in mounting locations, less expensive, easier to remove/replace. The only negative to me is the noise, which even then, if you don't hear the pump, it makes it easy to diagnose a problem if you're having one. The Olds mechanical pump can be blocked off with a readily available block off plate for a Big Block Chevrolet.
The Jalopy Journal
