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Someone posted a bit ago that their 930 registered 0.5bar at a sustained 140mph. The motor is built specifically to be turbocharged and will not perform well without it.
It would be my guess (I do not have a turbo so don't know) that the stock 4spd cannot redline in top gear. They are geared really high. At max sustained throttle the stock turbo would be pulling 0.7bar constantly. The high air speed might keep things cool.
Hopefully someone with a stock 930 that has actually done this will chime in.
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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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