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RarlyL8 RarlyL8 is offline
Crotchety Old Bastard
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Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,725
A similar 3.3L engine I was involved with went 400+HP to the rear wheels. With the current boost setting I would expect 360+HP at the rear wheels, not the crank. The head work, turbo, cams and fuel head should all support the power.
As for the boost level, just pick an effective C/R, swap springs and tune for it. I suggested 0.7bar early on to protect the investment until all tuning was correct. All boost (up to 1.0bar) should be in by 2700rpm so the wastegate at 0.7 bar should open well below 3000rpm.

Why should CIS be expensive? The Leask WUR and fuel head mod are all that should be required to support the 400-425WHP target.

These mechnics know CIS engines so I would expect the dyno setup to have the correct fuel delivery system in place. What they are not familiar with is the adjustable WUR.
Answers to the above questions will shed light on where to look for the fueling problem.
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 03-27-2008, 08:48 AM
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