K Shaw Posted January 21, 2011 Share Posted January 21, 2011 So what do you all think this car is worth. Seller wants me to make a offer and I dont want to go so low that its offensive. 1981 Porsche 931. Rebuilt motor/head/turbo. Body straight. Interior ok. The head was removed at one time and never reinstalled so the short block may not be any good or at least needs a good hone to remove rust from the cyl walls. Seller also has another known good short block that he will toss in. I would have to drive 8 hours one way to get it so add in the price of diesel fuel to get it. kyle Quote Link to comment Share on other sites More sharing options...
DWNSHFT Posted January 24, 2011 Share Posted January 24, 2011 While I have always liked 931s, they are not popular cars to own and they don't get much love. Also, stock performance levels are less than a 944. Since your signature indicates you are a VW mechanic, I'm guessing you're aware that the 931s are also less reliable and some parts are difficult to source. Therefore, I would say that a 931 value would be less than a comparable-condition early 944. If the chassis is straight with little rust and the interior is decent, and you're bidding based on photos, and you know it doesn't run, I'd bid $1,000 knowing that what you really ought to do is swap in a VW 2.0 TFSI turbo motor and a 951 transmission. David Quote Link to comment Share on other sites More sharing options...
K Shaw Posted January 25, 2011 Author Share Posted January 25, 2011 ha. How about a turbo ABA/ABF with motronic the turbo mounted on the other side ala 951. Used ABAs are cheap. Junk yard a 91/92 16v 2.0l head. Toss that onto the ABA creating a boost friendly CP ratio of 8.1 and then a Holset turbo from a Dodge truck, external wastegate and a full 3inch exhaust. Only problem is I;m pretty sure the front subframe/cradle would take a bunch of work to get anything but the Audi ebngien to fit and then you would need some sort of bell housing adapter plate. However a Audi 20v T 5 cylinder will bolt up to the Porsche bell housing and they actually fit the cradle with a small amount of fiddling around. Quote Link to comment Share on other sites More sharing options...
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