View Single Post
WERK I WERK I is offline
Forced Induction Junkie
WERK I's Avatar
Join Date: Jan 2003
Location: Wisconsin
Posts: 3,291
Maybe you could find a used 930 (3.0-3.3) CIS? I've seen them on e Bay and on the Pelican Parts forum, maybe even a Mercedes or Volvo system may cut it. Search for one matching your HP requirements, not your engine displacement.

Your current system simply is not going to cut it without extensive modifications.

Let's say you have a 200HP 3.0liter 911SC
Injector Flow Rate (cc/min) = Engine HP x BSFC x 10.5/Number of Injectors x Injector duty cycle

Injector Flow Rate (cc/min) = 200BHP x .45 x 10.5 / 6 x 1.0
Injector Flow Rate (cc/min) = 157.5 cc/min = 157.5ml/min

Look at the numbers for a Supercharged 300HP 3.0 liter engine. Keep in mind your BSFC will go up due to it being a supercharged engine.

Injector Flow Rate (cc/min) = 300BHP x .65 x 10.5 / 6 x 1.0
Injector Flow Rate (cc/min) = 341.25 cc/min = 341.25 ml/min

You have to more than double your injector output, at the same injector fuel pressure. Sure you could fiddle with your current system, but why? It will just cost you more in the long run, financially and psychologically.
'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

Last edited by WERK I; 01-22-2010 at 06:46 AM..
Old 01-22-2010, 06:44 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #48 (permalink)