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Join Date: Dec 2003
Location: Centreville, MARYLAND
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79SC Fuel Pump ??
I am pretty sure my 79 SC fuel pump went south. My question has to do with ordering one. I think I read somewhere that the 79 fuel pump check valve was inside the pump. If this is true, do replacement pumps come with check valves or must they be ordered seprately?
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Old Tee all 911s sold |
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05-26-2004, 07:19 PM
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Location: Centreville, MARYLAND
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Le bump.
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Old Tee all 911s sold |
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05-27-2004, 02:53 AM
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The 78 SC I worked on had the non return valve in the bolt assembly on the end of the pump. When I changed to the 930 type 12mm fuel line from the 10mm stock line, this valve was replaced with a 12mm hollow bolt with non problems.
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2014 Cayman S (track rat w/GT4 suspension) 1979 930 (475 rwhp at 0.95 bar) |
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05-27-2004, 06:12 AM
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Thank you, but I am confused. I pulled my pump and it does not have a external check valve. It looks like there may be one down in the output port. It would seem that without a checkvalve fuel would flow back into the tank unless the accumulator provides negative pressure enough to hold fuel in the line. I notice that pumps are specified by Porache model year but I suspect that has to do with a pressure specification or port size as you suggested above. Sure could use some help here. I know I don't have it exactly right. Maybe a check valve is no longer needed in this layout.
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05-28-2004, 04:35 AM
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Location: Peoples Republic of Long Beach, NY
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Quote:
I'd call Pelican Parts for the correct pump
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Ronin LB '77 911s 2.7 PMO E 8.5 SSI Monty MSD JPI w x6 |
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05-28-2004, 05:35 AM
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Answer to my question is if you order a pump for a 77-79SC you get one with a check valve in the pump. If you use another year you have to acquire a external check valve.
Pump installed. 911SC running well.
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Old Tee all 911s sold |
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05-29-2004, 04:46 PM
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My Son is selling this on EBAY, its a rebuilt which can be a crap shoot, but it has the banjo bolt with the check valve. I think it is a later model pump than he thinks, but he lost the receipt, that is why he is selling it.
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1969 911 |
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05-29-2004, 05:10 PM
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1979 Porsche 930 3.4
1969 Porsche 911 2.7 CIS
