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WERK I WERK I is offline
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Join Date: Jan 2003
Location: Wisconsin
Posts: 3,291
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Keith,
The difficulty in comparing EFI injectors to mechanical injectors is in the very nature of their designs. Calculations for EFI injector output is based upon the duty cycle of the injector with the injector running at a specific fuel pressure. Mechanical injectors always run at 100% duty cycle but their volume is based upon a varying fuel pressure. Without specifications of the injector, it is impossible to determine if an injector (and the associated delivery system) is up to the task of providing the required amount of fuel.. I'm sure Bosch has injector curves based volume versus pressure, but it has been extremely difficult to find them anywhere.

There's no problem with the calculator in determining the fuel requirements. It's the problem of knowing whether the delivery system (in this case, CIS) can handle the increased demand, i.e. increased fuel pressure.
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Dave
'85 930 Factory Special Wishes Flachbau
Werk I Zuffenhausen 3.3l/330BHP Engine with Sonderwunsch Cams, FabSpeed Headers, Kokeln IC, Twin Plugged Electromotive Crankfire, Tial Wastegate(0.8 Bar), K27 Hybrid Turbo, Ruf Twin-tip Muffler, Fikse FM-5's 8&10x17, 8:41 R&P
Old 01-22-2010, 09:29 AM
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