'901/23' Racing Crankcase

[LongRanger]

Came across this today:

http://www.carquip.com/parts/911/race/910/index.asp

'Type 901/23 Factory racing crankcase
with factory documentation.
Serial # 5080006, stamped 10 856.
Titanium head studs.
Purchased from Vasek Polak Competition.'

'Type 901/23 was a 2.0L racing engine of 80mm bore and 66mm stroke developing 210 horsepower with mechanical fuel injection.'

$4000

There's mention of some Ti-bits, but what other features/qualities makes this item special? Any motor Gurus here who can provide some more details about this?

Rick Kreiskott

[pu911rsr]

Rick,
Anderson lists this motor in his book but w/o much detail, link is here -http://books.google.com/books?id=QJVcgiQhRfQC&pg=PA108&lpg=PA108&dq=Porsch e+engine+type+901/23&source=bl&ots=lmLYoQ7BN8&sig=33kEWqPyPj0EG4uFJ6 kwxOToJrs&hl=en&ei=YtueSq_ODZOHmQfd-7y1Aw&sa=X&oi=book_result&ct=result&resnum=5#v=one page&q=&f=true
I'll do some research tonight.
Phil

[andyjboy]

I think it was essentially the same as the 911R engine but with mechanical injection rather than 46 IDA Webers.

I think the stated power output was actually 10 bhp more at 220 bhp.

[Zithlord]

+1 Andy. 2 liter MFI racing engine, rare.

J

[LongRanger]

Rick,
Anderson lists this motor in his book but w/o much detail, link is here -http://books.google.com/books?id=QJVcgiQhRfQC&pg=PA108&lpg=PA108&dq=Porsch e+engine+type+901/23&source=bl&ots=lmLYoQ7BN8&sig=33kEWqPyPj0EG4uFJ6 kwxOToJrs&hl=en&ei=YtueSq_ODZOHmQfd-7y1Aw&sa=X&oi=book_result&ct=result&resnum=5#v=one page&q=&f=true
I'll do some research tonight.
Phil

Hi, Phil . . .

Thank you for the link. And I'd love to hear anything else you can find out. I've been looking at building a back-up motor and this came up. Pricey --- but Polak always kept The Good Stuff, so . . .

Rick Kreiskott

[v-8]

The 911r used a 901/22 case. What is the difference between a 22 and 23 case ?

[davep]

There was probably no difference between the cases with most of the 901/2x engines, The type # just differentiates between the the finished engine. Say between the carbed or fuel injected versions; although the changes there were probably more involved. There may have been both magnesium and aluminum versions of each engine though.

[v-8]

Well, the 23 case has of course attachements for the MFI pump...

[gled49]

the pictures are of top only. does the case have pressure relief and safety valve machining on bottom rear and side rear of case. gordon

[davep]

Apparently this case was sold several years ago, but the website cannot be corrected. A new website is being constructed. What is interesting about the crankcase is that it seems both types 22 and 23 shared the same serial # series 508xxxx. It would be very interesting then to check the 911R engines to see what serial #'s were used and what type each one was.