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K27 vs k27s ?

What are the performance characteristics between a K27 and a K27S ?

Thanks

EP Slick
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AMG V8 SL55 Mercedes, 993 C2, 86' Carrera 3.6 hot rod, Purple 1998 993 that didn't make the cut, 3 very old 930s, A/Fuel Dragster CH3NO2 (R.I.P.), Blown Alcohol TAD, AA/AA, 360 Maxim wingless, Cummins Turbo Diesel. Amateur Welder, Painter and sculptor sort of. -
Old 07-20-2010, 06:19 AM
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I think the 'S' stands for 'Slightlybetter' or 'whatitSHOULDhavebeentobeginwith'

Putting my red '79 (S) against my friend's red '84 (7200 + GHL) and there wasn't a lot in it either way. (Sorry it's not the definitive 'Dyno Chart' answer you were probably looking for.)
Old 07-20-2010, 06:36 AM
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I carry those Ed. I'm going to assume by K27 you mean the K27-7200. The difference between the 7200 and the S is a machined cold inlet housing on the S. This facilitates about a 300rpm quicker spool than the standard 7200. It was designed to take advantage of the 965's larger ID air inlet plumbing. I have installed them on several 930's and do see a difference when compared to the 7200. The convoluted down tube on the 930 should take away some of the affect, exactly how much I have not measured. I generally recommend these turbos to 965 owners and those adding a turbo to a 3.2L Carrera as they have no down pipe restrictions in that application. The turbo handles low boost applications well and is a quick spool.
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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 07-20-2010, 07:56 AM
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Thanks

Thanks for the feedback. Good to be back in the land of the living.

EP Slick
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AMG V8 SL55 Mercedes, 993 C2, 86' Carrera 3.6 hot rod, Purple 1998 993 that didn't make the cut, 3 very old 930s, A/Fuel Dragster CH3NO2 (R.I.P.), Blown Alcohol TAD, AA/AA, 360 Maxim wingless, Cummins Turbo Diesel. Amateur Welder, Painter and sculptor sort of. -
Old 07-20-2010, 03:41 PM
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Glad to have you back EP, the 993 is pretty but nothing gives you the exerience like that of a modified 930.
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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 07-20-2010, 07:16 PM
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Quote:
Originally Posted by RarlyL8 View Post
Nothing gives you the experience like that of a modified 930...
Eldon's certainly been there and done that

But, Brian, as regards the 'stiff pipe' (connecting turbocharger and intercooler) - would the average 930 owner be much better off with one of those 964-turbo-style Silicon pipes?
Old 07-21-2010, 02:58 AM
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Crotchety Old Bastard
 
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The tubing in question is the down pipe from the CIS air meter plate to the turbocharger cold side inlet. On the 930 this tube is very mangled looking as it goes through the engine tin area with a questionable ID that may not allow the K27S to get full value from the conical inlet machining.
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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 07-21-2010, 04:09 AM
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Sorry to be such a dunce, but you wouldn't happen to have a picture of said item? (I'd like to think that I'm pretty familiar with 'my old girl' but I don't recall anything other than the pipe from the turbo to the I/C.)
Old 07-21-2010, 05:27 AM
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