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RarlyL8 RarlyL8 is offline
Crotchety Old Bastard
 
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Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,255
Garage
I know nothing about Garrett turbos, however I can give you some 1st and 2nd hand info on the K27 series.

First off there is MUCH more to fast spool up than just the turbo. All of the coordinating components in combination with perfect tuning are required for minimum lag.

An extreme example that I know of consists of a 3.3L CIS engine, SC330 cams, aftermarket heat echangers/headers, ported heads, and a K27S turbo:
- 470CHP, 400RWHP
- Boost Threshold @ 1800rpm, 1.0Bar @ 2600rpm, no perceptable lag
- 22mpg highway

There is more than one way to skin a cat.
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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
Old 04-28-2007, 06:26 PM
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