924Board.org

isuras2 · Joined: 17 Jun 2005 Posts: 458 Location: Phoenix, AZ

Would an early 90s VW Jetta fuel pump (both external and internal) work for an 80 924?
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Rob
'80 931 (sold)
'80 924 NA (sold)
Former Omaha Crew

morghen · Joined: 21 Jan 2005 Posts: 9095 Location: Romania

probably not.
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cdubya · Joined: 20 Aug 2006 Posts: 21 Location: Ames, Iowa

no idea about the jetta. But I have been running a volvo pump in my 931 for some time, and it has worked out quite well.
you might look up the specs for the jetta pressure range of the pump/system and see if it checks out with your car.
Putting in a wrong pump could cause issues other than poor performance, so you should be cautious.
also, the tech section has a listing of the interchangeable parts on our cars.

cheers,

colin

Mike924 · Joined: 12 Aug 2004 Posts: 2601 Location: IoW UK

If it's from an EFI Jetta then no way.

If it's from a CIS Jetta then possibly, but unlikely.

The problem is that the 924 system pressure is very high, even for CIS (which generally runs at a much higher pressure than EFI anyway). The fuel pump needs to be able to supply the full flow rate and still be able to maintain a pressure of about 100 psi.
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1985 Porsche 924 'Lux', Kalahari Beige (my ex)
1993 Porsche 968 Coupe, Midnight Blue, 6 spd

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Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

If you can swing $125, you can get a Pierburg external. . .good quality pump.
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WeiBe (1987 924S 2.5t) - 931 S3