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Non Compos Mentis
Join Date: May 2001
Location: Off the grid- Almost
Posts: 10,597
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Fuel pump placement for engine swap
Okay guys, the 911 project still looks cool sitting on the jackstands in the garage, but it's time to get the car back on the road.
The question- The '73 has the fuel pump right in front of the left rear suspension. The '87 donor has the pump up front right behind the tank. I am obviously using the correct pump to go with the 3.2, but is it okay to mount it in the original location in the rear or is there some reason it should be mounted close to the tank like it was in the '87? |
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01-07-2003, 08:25 AM
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Member
Join Date: Mar 2002
Location: Bellevue, WA
Posts: 58
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For what it's worth, when I put a '77 engine in my '73, I installed the new pump in the same location as the old one, in the rear, even though the '77 like your 3.2 had its pump up forward. Seems to work fine.
Bob Spindel Where are you in WA? I'm in Bellevue.
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Bob Spindel '73 911 w 2.7S engine |
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01-07-2003, 08:54 AM
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Non Compos Mentis
Join Date: May 2001
Location: Off the grid- Almost
Posts: 10,597
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Thanx. I will do likewise. There is already a bracket and electricity there. Lots easier than mounting it up front.
I'm in Gig Harbor. |
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01-07-2003, 09:50 AM
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Friend of Warren
Join Date: Oct 2000
Location: Lincoln, NE
Posts: 16,492
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Depends on what type of fuel pump you got. Some are designated as "pushers" which should be mounted as close to the fuel tank as possible and are a more efficient fuel pump then the "puller" which is typically mounted in the engine compartment. As your mounting is about 2/3 the distance betweent the fuel tank and the engine a "puller" would probably be the best pump, but I suspect either one will work just fine.
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Kurt V No more Porsches, but a revolving number of motorcycles. |
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01-07-2003, 09:55 AM
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Registered
Join Date: Oct 2000
Location: Sherwood, Oregon
Posts: 2,119
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Some of them were moved to reduce vapor lock, I think.
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Cary 77 Carrera RS w/3.2 #59 73 914S 2.0 AG 73 914 1.7 Driver ( daily driver, under complete rustoration ) 74 914 2.0, 71 914 Tub, 74 914 2.0 Tub + 73 914 donor |
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01-07-2003, 12:29 PM
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Registered
Join Date: Oct 2001
Posts: 497
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Which pumps are good "puller" pumps .???
I have had a never ending problem with my rear mounted pump getting sufficient flow. Park the car down a steep hill and good luck starting it ! Any suggestions would be greatly appreciated |
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01-07-2003, 01:02 PM
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Registered
Join Date: May 2000
Location: Los Alamos, NM, USA
Posts: 6,044
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Most pumps have a minimum positive suction head requirement depending on their design and the fluid being pumped. I doubt there is such a thing as a "puller" pump; all pumps require some pressure to fill their intakes. Putting an electric pump where it has as much head (pressure due to the weight of the fluid column above it) of cool fluid on it is almost always the best bet. Jim
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01-07-2003, 05:33 PM
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