Fuel pump differences CIS
11-12-2007, 10:26 AM
#1
Drifting
Thread Starter
Fuel pump differences CIS
Well aftyer my minor fuse box fire I will need to replace the fuel pump on my 82 SC.
My brother has a new pump for a 77 911 he is willing to donate.
Will this work?
I did some research about it on Pelican and from what I can find the only real difference is the part number and flow rate at WOT, the pressure is the same.
http://forums.pelicanparts.com/showt...mp+differences
Thanks !
John
My brother has a new pump for a 77 911 he is willing to donate.
Will this work?
I did some research about it on Pelican and from what I can find the only real difference is the part number and flow rate at WOT, the pressure is the same.
http://forums.pelicanparts.com/showt...mp+differences
Thanks !
John
11-12-2007, 12:13 PM
#2
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Pump should work, one of the other differences is the way the check valve is added, some are internal ( I think) and some are external. '77 is a lower capacity engine, but flow should be fine and you can tweak control pressure if needed assuming you have a gauge.
11-12-2007, 01:37 PM
#3
Rennlist Member
John: We had a policy at the shop to never try to make an alternate part work in place of the part called for by Porsche. It's never a good idea to start adapting items, which always seems to create new and unusual problems...
11-12-2007, 07:25 PM
#4
Drifting
Thread Starter
Pete,
I've decided to go with the proper fuel pump.
I do not want to run the risk of running to lean at WOT causing detonation since I have a high compression motor.
John
I've decided to go with the proper fuel pump.
I do not want to run the risk of running to lean at WOT causing detonation since I have a high compression motor.
John
11-14-2007, 09:10 PM
#5
Drifting
Thread Starter
Pete,
Sorry to bring this up again, but does anyone have experince with the Walbro fuel pumps.
I did a search on Pelican BBS and did not find any negative comments.
John
Sorry to bring this up again, but does anyone have experince with the Walbro fuel pumps.
I did a search on Pelican BBS and did not find any negative comments.
John
11-19-2007, 11:33 AM
#7
Rennlist Member
I don't know anything about Walbro, but a friend recently went the aftermarket route due to the expense, and the wait time, to get a new pump through the dealer from Germany. 3 pumps later, the car is now running perfect - with it's new Bosch pump bought from the dealer.
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11-19-2007, 02:20 PM
#8
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Join Date: Jan 2004
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John:
I've used Walbro and Facet without problems on race cars for years. Caveat: these are carbed cars and don't need the PSI CIS does. Change out every couple of years b/c are cheap ... and don't want a failure when racing.
And yes, like the others here mentioned, I replaced the fuel pump on my '76 with the correct Bosch $$$ part. I did it four or five yers ago ... these pump prices have jumped [just checked on PP for ha ha(s)].
I've used Walbro and Facet without problems on race cars for years. Caveat: these are carbed cars and don't need the PSI CIS does. Change out every couple of years b/c are cheap ... and don't want a failure when racing.
And yes, like the others here mentioned, I replaced the fuel pump on my '76 with the correct Bosch $$$ part. I did it four or five yers ago ... these pump prices have jumped [just checked on PP for ha ha(s)].
