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copbait73 copbait73 is offline
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Join Date: Nov 2003
Location: Chesterfield IN
Posts: 1,314
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73.5 911t cis turbo

This project is NOT a high power small motor instead it’s an old school street turbo upgrade to the very desirable 73.5 911T 2.4L CIS motor. I’ve been wanting to do a mild turbo install on this engine for years. When I found a really nice black on black ‘73 (57K miles) but with ratty engine compartment I knew I had my subject.

The turbo is a used 993TT 3K found on eBay. Manifolding is total fabrication using mandrel bent tubing from Summit Racing. Turbine inlet and outlet flanges were designed and cut at a local welding shop for $30 each. I TIG welded the large flanges but gas torch welded the rest.

I fabricated the oil flanges and it gravity drains to the chain cover. So far total cost is less than $400.




Last edited by copbait73; 06-05-2009 at 05:28 PM..
Old 06-04-2009, 05:36 PM
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