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911nut 911nut is offline
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Join Date: May 2001
Location: Michigan
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Quote:
Originally Posted by JFairman View Post
Sloppy old CIS injects fuel continuosly so it's still injecting fuel while the intake valve is closed unlike sequential EFI that only injects while the intake valve is open.
The fuel injectors spray onto the backside of hot valves so that the vaporized fuel gets forced into the combustion chamber when the valve opens. Fuel vapor is a lot more volatile then fuel droplets.
Any non-sequential fuel injection uses this strategy to keep fuel from wetting the intake walls.
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Paul B.
'91 964 Turbo
Port matched, SC cams, K27/K29 turbo, Roush Performance custom headers w/Tial MV-S dual wastegates, Rarlyl8 muffler, LWFW, GT2 clutch & PP, BL wur, factory RS shifter, RS mounts, FVD timing mod, Big Reds, - 210 lb
Old 06-09-2014, 05:13 AM
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