Fuel Pumps - Group 4 Weber-Equipped Cars

[72Group4]

Need some input here - What fuel pumps did Porsche use for their Weber 46 equipped Group 4 cars? Am building a 1972 911 to the 1971 Group 4 specs for vintage racing and can't seem to find out any info on what fuel pumps would have been used. Any pictures on installation would be greatly appreciated.

Thanks,

Andrew

[Steve@Rennsport]

Those cars should have had a pair of Bosch 0 580 960 009 (911.608.107.00) pumps. Those are long NLA so this may be an issue where absolute orginality is required.

[advtracing]

have a look through this site , found it on the weekend and is really interesting for bosch vintage parts http://www.automotive-tradition.de/e...inekatalog.htm

[Steve@Rennsport]

John,

Be aware that some of these items are no longer actually made in Germany and are in fact, very expensive replicas offered by Bosch & the Factory.

Outsourcing has gripped Bosch and their QC has truly suffered for it.

[advtracing]

yep, have heard that . but the list of vintage products for the past was a good ref , plus some other interesting stuff

[chris_seven]

Those cars should have had a pair of Bosch 0 580 960 009 (911.608.107.00) pumps. Those are long NLA so this may be an issue where absolute orginality is required.

Steve,

I though that these pumps had a By-Pass Regulator set at between 1 and 2 bar and were used with the MFI regulator set in the engine bay at just under 1 bar.

How did the 46IDAs cope with this much pressure? They must have substituted the engine bay regulator for something quite different.

[Steve@Rennsport]

Hi Chris,

These are the Bosch pumps used on the carbureted cars (914/6 & 911T) and they make 4.0 psi. I usually install an FPR to knock that down to 3.5 psi for the Webers.

[advtracing]

chris , if you are running a ST style engine with twin fuel pumps would these still be the suitable item