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If the focus is to remain on increasing the CIS capacity to fuel the added displacement we would first look at the fuel distributor. Let me know the part number and we will see if it is doable using that unit. The next potential restriction might be the throttle body. Need to know which CIS system you have to identify the choke points. If you have the '78/9 setup it's a better starting place.
I like the Sniper setup personally. It is very clean, simple, and it works. I've got pictures of it somewhere and will post if I can find them. Looks a lot like the carburetor picture posted earlier, just a TBI unit sitting on a custom plenum box. Eliminates all of the CIS clutter and complexity.
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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
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