Fuel pump options for 73 injected model |
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Fuel pump options for 73 injected model |
maddhatter |
Jul 5 2011, 11:20 AM
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#1
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Newbie Group: Members Posts: 7 Joined: 5-July 11 From: Clementon, NJ Member No.: 13,279 Region Association: None |
I recently picked up a 73 1.7 that had been stored inside for 20 years. The body is great as expected sitting inside, but the fuel pump does not work among other things and looking for a replacement I see that they are no longer made. Great! Can I retrofit a later model pump to fit my car? I thought the injection systems were pretty much the same all the way through the years, but the newer pumps look vastly different from my hunk of metal pump, mine having 3 hose connections and the newer ones only the typical two. Thanks in advance.
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SLITS |
Jul 5 2011, 09:41 PM
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#2
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None |
The factory moved the pump to the front for the vapor lock reason in '75 - '76. In very hot weather, or extremely hot climates a Porsche will vapor lock when running.
My /4 did it in Vegas & Laughlin, Nevada. Temps ranged from 98 - 105. It was pulling the long hill out of the Colorado River Valley. My /6 did it climbing out of Laughlin to Kingman, AZ. If you look at the location of the fuel pump from '69 - '74, you might notice that the exhaust of hot air from the HEs is directed at or very close to the fuel pump. It is my belief, unfounded, that this hot air, under extreme loads or heat, overheats the pump, boils n(ok Nerds, volatilizes) the gas in the pump and the pump doesn't really pump air (fumes) very well. Moving it to the front is a bit of work but is not brain surgery. It eliminates a potential or real problem combined with proper center tunnel lines and fuel hose. Your choice ... mine is from experience. |
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