Thread: GT35R v K27
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RarlyL8 RarlyL8 is offline
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Join Date: Jan 2000
Location: Huntsville, AL
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The HFS will hit 1bar at 2600rpm, so no ball bearings will be much quicker given the same size turbo.
The 7200 starts to run out of steam above 5500rpm, the HFS and K27 hybrids will blow 1bar right past redline.
The turbo does not determine fueling requirement, but rather the output of the engine. Typically the stock fuel head will support up to 375WHP. The K27HFS should not be used on a stock engine as it is not being utilized. Minimum requirements are headers, muffler, large intercooler, and 1bar boost. This will bump you near the 375WHP number but should not require a fuel head recalibration. It will require an adjustable WUR to insure safe AFR's.
My 930 headers are all split plenum as benefit is had even by conventional turbos with this type of tuned system. Twin scroll turbos are like 2 separate turbos, one for each bank, so you can see how that would be quick to spool.

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 10-31-2011, 07:58 PM
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