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RarlyL8 RarlyL8 is offline
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Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,563
Equal length primaries are mandatory to optimize the twin volute design. Each pulse must arrive at a different time.
SSI developed their version of the twin volute system some 15+ years ago. A modified GT30 now sits in the turbo spot. Twin 38mm waste gates balance the two banks. The system was optimized for torque and boost response.
Sense you already have the SSIs installed I would give that a go first and then compare it to the 993 based H/E system you plan to develop.

Here is what a 930 engine looks like with 993 H/Es mounted. The stock turbo orientation may be tricky on the driver's side.

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

Last edited by RarlyL8; 11-14-2008 at 08:09 PM..
Old 11-14-2008, 08:07 PM
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