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RarlyL8 RarlyL8 is offline
Crotchety Old Bastard
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Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,525
I've done some fiddling in the past with the ideas in this thread.

Several stock 930 air boxes were hacked up before I tossed them all and stuck a simple paper filter on top the air meter assembly. I removed the cone from one of the air boxes and mounted it on the bottom side of the filter lid. Figured Porsche wouldn't have it there if not needed. I could not tell any difference with or without so I chucked that as well. My thought at the time was that this cone may have more function with the idle characteristics of a stock engine and not be necessary with my minimal CIS and non-stock tune.

Exactly what performance gain do you expect to see with the spun aluminum CIS version of the Tornado? I'd be glad to dyno one for you but I'm not sure what significant benefit this is for a sub-350whp 930. You would need to tell me exactly what parameters to measure. I assume AFR, HP and torque throughout the operating range.
Also, does installing this device on the metering plate require a re-calibration of the plate?

Someone mentioned fuel heads. The Mercedes V8 is the same casting as the 930. You can also use a 928 CIS fuel head. The problem with this is fuel distribution of the extra 2 injectors. The stock 930 pancake intake is not designed to distribute fuel evenly. Another problem is fuel mileage. You now have 8 injectors running all of the time.
RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 03-09-2009, 05:52 AM
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