View Single Post
Reanimotion Reanimotion is offline
umop apisdn
 
Join Date: Jun 2014
Location: Brisbane, Australia
Posts: 441
For example the following from post 26 of the 934 thread

Quote:
Originally Posted by Grupp-A View Post
Here is a flow chart of Bosch CIS fuel distributors and all 911/930 distributors are listed. I guess the flow rate must be the factory setting from Bosch.



<....>

Fuel req. per injector:

6 cyl 300 bhp fuel req. 250cc +/- 10% = 225-275cc/min/cyl

6 cyl 350 bhp fuel req. 292cc +/- 10% = 263-321cc/min/cyl

Daniel
Based on the numbers, an unmodified CIS system should hit the wall at a little over 300hp

Depending on which magic internet HP calculator I use for 500hp @crank I get between 333cc and 399cc @75psi for 6 injectors. 300hp @ the wheels I'm seeing 275cc so I suspect the numbers mentioned above are WHP not crank. The 150 litres/hour might be supply not output but divides out to about 420cc.

have a play with http://fuelinjectorclinic.com/flow-calculator
__________________
Steve
1981 928S 4.7 ROW with KE3-Jetronic and Franken8 (AEM Inifinty) follow at [http://www.frankencis.com/Activity-Feed/userid/2]
Yes! mechanical/hydraulic constant flow injection can be managed by a modern EMS

www.FrankenCIS.com

Last edited by Reanimotion; 02-15-2015 at 04:49 PM..
Old 02-15-2015, 04:18 PM
  Pelican Parts Technical Article Directory    Reply With Quote #286 (permalink)