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Dr J Dr J is offline
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Join Date: Apr 2008
Location: Miami
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Found this from boyt911SC in this link: 81 911 Cis-k Test Questions

"Someone has suggested doing the flowrate measurement using the 6 injectors. This procedure will tell you the flow rate via the FD (fuel distributor) and the value of the flowrate obtained is no where close to the fuel pump delivery rate. WHY? A portion of fuel delivered by the FP is diverted back to the tank via the FD pressure release valve. Since a good FP can deliver excess fuel needed by a CIS, the excess fuel is directed back to the gas tank.

Any more questions? Just ask. Good luck.


I found Rob (1980SC) doing the flow test and ending up with 41 oz/min (total of 6 injectors) in this link: CIS Gurus - Help me Safely Inject my Hot Rod 3.0

This is 202 ml/min per injector on a 78-79 FD at roughly 5 bar.

In this thread, Souk posts that others have 7.4 oz/min for a 3.2: What are early 3.0L injector flow rates?

This is about 220 ml/min
1979 SC, Slant nose wide-body cab conversion. AEM Infinity EFI. Whipple Supercharged!

Last edited by Dr J; 01-20-2010 at 07:31 PM..
Old 01-18-2010, 01:19 PM
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