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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
The easyest cheap way is to colect 930 take off parts from up grades and just bolt them up to your motor with a lower boost setting.

For the exhaust. The 930 J pipe bolts up to stock SC heat exchangers, to a wast gate, and to the turbo. You could use a stock take off 930 turbo at first thought a K27-7200 would start on boost earlier. A 930 muffler would bolt up to the turbo.

The only fabrication so far is going to be removing the rear tin and cutting around the turbo intake and discharge.

Often 930 owners upgrade to EFI and they sell off there stock intake manifold , fuel system, and intercooler on the cheap. It would be hard to beat this by trying to adapt your CIS system to be a turbo unless you are just a good fabricator and enjoy doing such.

Your ports are 34mm and the turbo's is 32mm so you could open up the turbo's manifold just a little or just bolt it up as is. You will probably need longer intake studs.

The only thing would would not try to copy is the turbo oiling system train. Check with Ben at M&K mufflers about a drain that plumbs into the bottom of your case.

You will probably need to upgrade your stock fuel pump to a high pressure 044 or just add a second 930 pump in line with your stock pump.

You have about 9.3/1 compression it looks like. You will want to keep your boost under 7.5 lbs or .5 bar max. You will need a different wastegate spring to do this.

As to the spark it would probably be easiest to look for a used MSD and boost retard unit as timing on boost will have to be retarded to make your motor safe.

Such a set up with your stock SC cam should make 260-300hp.

Last edited by 911st; 01-28-2010 at 02:08 PM..
Old 01-28-2010, 02:04 PM
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