924Board.org

CBass · Joined: 03 Nov 2002 Posts: 2807 Location: Vancouver, Canada

looking for a wrecked 931 head for some R&D. Need to get a port cross section and figure out the thickness around the combustion chambers for CCing purposes.

Doesn't matter what's wrong with it whether it's warped, cracked, missing it's cam caps, stripped threads or damaged from timing belt breaking etc. I just need a casting to chop up and I'd rather not use a good one.

This is for my 933 style project engine.

I'm willing to pay a fair price plus shipping, PM me if you have anything or any leads.

*edit* Just noticed I put this in the wrong forum, my bad!

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'81 931 in various states of assembly

Kenodog · Joined: 25 Jun 2003 Posts: 2669 Location: Vancouver,B.C.

If you have a good head I can UT it and tell you the exact thickness without causing ANY damage whatsoever. (just little splooge marks)
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1979 Euro 931, Olive
1981 931, Sabine
1991 Ford Ranger XLT 4x4, Ricky
1996 Ford E-350 ex-FedEx Van
2014 Mazda CX-5 (Kinderwagon)
2019 KTM 790 Adventure
2024 KLX300
2024 KLX140

seanski44 · Joined: 13 Mar 2006 Posts: 532 Location: Nottingham UK

CBass · Joined: 03 Nov 2002 Posts: 2807 Location: Vancouver, Canada

I think shipping from the UK to Canada would be prohibitively expensive but it's worth checking out

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'81 931 in various states of assembly

seanski44 · Joined: 13 Mar 2006 Posts: 532 Location: Nottingham UK

OK, when I get it off it and my spare 931 head are going to the machine shop to make one good un - hopefully... (spare head has threaded injector) and I'll have a head left over. If its really knackered I'll see what shipping is for you! If not too knackered it might go on the bay...

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1998 BMW Z3 2.8 arctic silver & red

1981 168HP 931 S2 blue/tan leather - SOLD

1985 121HP 924 2.0l na modded - SOLD!
1992 968 lux SOLD
1989 944 2.7 lux SOLD

CBass · Joined: 03 Nov 2002 Posts: 2807 Location: Vancouver, Canada

I managed to source one from my collection. After some cleaning up, it looks like the head I was intending on using has some minor water cavitation damage to the combustion chamber from the headgasket blowing. It could be fixed, but I need to chop one up anyways.

I'll hack this one up with a bandsaw and post my findings.
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'81 931 in various states of assembly

Peter_in_AU · Joined: 29 Jul 2001 Posts: 2743 Location: Sydney, Australia

Great! Can't wait to see the photos. It'll be really interesting to put them beside the 924 cross-sections.
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1979 924 (Gone to a better place)
1974 Lotus 7 S4 "Big Valve" Twin-cam (waiting)
1982 924 (As featured on Wikipedia)

Learn to love your multimeter and may the search be with you

CBass · Joined: 03 Nov 2002 Posts: 2807 Location: Vancouver, Canada

Heh, just peering into the ports you can see there is quite a difference. I'll bring it into work tomorrow, although I have to finish my heater core flanges before anything else.
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'81 931 in various states of assembly

Tigger937 · Posted: Thu Apr 20, 2006 12:43 pm Post subject:

Anyone know the difference between the 931 head and the CGT?
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1981 931 (Concours)
1982 931 (Daily Driver)

"Think outside the box"

CBass · Joined: 03 Nov 2002 Posts: 2807 Location: Vancouver, Canada

Having second thoughts about that head. I'm considering adding to the chambers in certain places to gain more quench surface, so I probably won't hack this one up. Still need one for the bandsaw alter.
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'81 931 in various states of assembly