924Board.org

BillA · Joined: 27 Dec 2002 Posts: 170 Location: Syracuse, NY

Sent the head off to be reconditioned, winter project, and I received a call from the machine shop yesterday. He reported that the valves are in pretty bad shape. I trust him as I he has done all of my machine work for the past 15 years and I have not had a single complaint! Anyway, he called to let me know that his suppliers prices for both exhaust and intake are steep $135 (US) exhaust and $145 (US) for intake! I have made a few calls and the best I can come with is a good set of used ones for $40 a piece. Right now, I'll take any opinions or places to call! Think I could get a government bailout?

Help!
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BillA

1981 931

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Raceboy suggests SS ones, available on E-Bay for pretty cheap. Search for the thread and enjoy the surly, I mean spirited discussion.
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

ic932 · Joined: 11 Feb 2005 Posts: 1104 Location: UK

I've got a 931 head with a very deep gouge and lots of tiny pinholes. i've decided not to even bother getting checked out. The valves will be available. I need some help though....What specs do i need to check-out to determine if the valves are suitable for re-use/sale?

Martijnus · Joined: 29 Dec 2006 Posts: 2019 Location: Netherlands

RC · Joined: 25 Mar 2007 Posts: 2637 Location: Australia

Found some stainless ones that I believe are the same as Raceboy posted about. These are only $30 ea new.

http://www.rpmmachine.com/si-valves-porsche.shtml

BillA · Joined: 27 Dec 2002 Posts: 170 Location: Syracuse, NY

Thanks for the help, they are on the way!!!!!!!!

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BillA

1981 931

RVJ · Posted: Sat May 16, 2009 1:58 am Post subject: Exh. valves 931

I know I'm late, guys, but...
Cleaning out a box of 924 parts, I came up with a set of exhaust valves # 931.105.406.02 qty 4, and one 931.105.406.03 valve.
Can ship them out Flat rate small box mail
$ 30 ea obo + ship takes them.

Took some pictures just in case.
Ricardo
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931Owner · Joined: 14 Feb 2009 Posts: 352 Location: Chicago NW Suburbs

Would you stay with stock valve springs on a road/semi autocross car?
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1980 Turbo
-too many cars and too many motobikes

RVJ · Posted: Sat May 23, 2009 4:54 am Post subject: 931 springs

There's room for improvement from the stock springs, 10 to 15 more pounds of seat pressure will give you a safety factor from over-rev or a missed shift. Well built titanium retainers a plus.

A simple port cleanup without metal removal, just rounding rough edges with a 120 grit roll or just match porting intake sides goes a long way improving things as well..
ricardo

931Owner · Joined: 14 Feb 2009 Posts: 352 Location: Chicago NW Suburbs

Sounds the deal... where can I get the springs and retainers?
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1980 Turbo
-too many cars and too many motobikes

RVJ · Posted: Sat May 23, 2009 11:36 am Post subject: springs

It's been a long time , but i think some Chevy small block parts is what we used for it. Have to verify that before saying for sure.
Ricardo