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Posted: Thu Feb 07, 2008 6:50 am
by Wally
Nah, the above didn't work either..
BTW, I think those are ADV performance parts. Case is custom casting and heads probably too iirc. Its mostly 911 sized stud spacing, which is a pity as those cases will be limited to 2,5 ltr IIRC.
Very nice and cool parts tho. Hope the two center/inner exhaust valves don't heat up too much in that location. Porsche didn't dare do that iirc...
Hosted them on our local vdub site:
Posted: Thu Feb 07, 2008 7:44 am
by M-Owen
Thanks for posting those pictures for me, I fooled around for a little over 30 minutes with them and they did not work. And I thought the four valves with 2 plugs was a little odd.
Posted: Thu Feb 07, 2008 11:23 am
by Unkl Ian
Posted: Thu Feb 07, 2008 11:23 am
by Unkl Ian
Hmmm
Posted: Thu Feb 07, 2008 11:25 am
by Unkl Ian
Posted: Thu Feb 07, 2008 12:27 pm
by dstar5000
You guys are trying to post an .HTM as an IMG!
Right click on the pic and copy that info and put THAT between the
[img]somethingoranother.
JPG[/img]
JPGs are images, HTMs are webpages.....
Don
Posted: Thu Feb 07, 2008 2:18 pm
by Piledriver
IIRC Pelican disables "deep" linking of images on at least part of their site, might not work, we'll have to follow the links.
Posted: Thu Feb 07, 2008 3:53 pm
by Unkl Ian
Don is correct.
Posted: Fri Feb 08, 2008 5:02 am
by Wally
Actually, seeing this pic again with these widely spaced plug locations, I do recognise those heads: In Bruce Andrsons book there is a pic of those as well: they were called 'Advantec' 4-valve aircooled 911 heads.
I know of one owner who had those on a 911 engine and suffered cracks between the exhaust seats with them. Hope they do better on a 4-cylinder.
Posted: Fri Feb 08, 2008 9:18 am
by M-Owen
Frallen or Bobtail if you can I am looking for a picture of finished camshafts. I am attempting to figure out the lobe orientation when I pin them back together ( yes I am going to attempt the pinning tonight )
Posted: Fri Feb 08, 2008 11:53 am
by Frallan2
M-Owen,
I could get you a picture next week when I am back in Sweden.
But seriously, your approach is probably good in some way but I think you need some good degree wheels and indexing to get the timing right?
Or how are you thinking?
I did ask Bobtail/Russ if there was anyway to share some pictures how they indexed/pinned their solution.
Probably no pictures available and now it is a new owner of the engine.
As for the 4 valve heads, I think it all looks nice but why not have a centrally located plug? That is one of the really nice possibilities with a 4 valve head. Shallow angel, central location of plug, large valve area.
Two plugs, good idea ...but?
Now I also recall some old time BMW engines. Was it Formula 2? They had three plugs and 4 valves.
Posted: Fri Feb 08, 2008 12:28 pm
by M-Owen
I have every intention of using a degree meter to index the lobes, I was looking for a reference more than anything else.
Thank you for your quick response
Posted: Fri Feb 15, 2008 7:13 am
by mikeG15
Now I also recall some old time BMW engines. Was it Formula 2? They had three plugs and 4 valves.
BMW had a formula 2 engine in the late 1960s with radially disposed valves and ports with alternating inlet and exhaust. ie there were exhausts on both sides of the 4 cylinder engine and the inlets were not parallell to each other which must have made for an interesting cam design..
The heads were designed by Apfelbeck.
I saw the works March BMW team race at Mallory Park about 1970 and they had then reverted to a more conventional layout.
Posted: Fri Feb 15, 2008 12:46 pm
by Wally
Very good Mike!
That was indeed one of the unique Apfelbeck cylinderhead designs. The opposing valves 'radially orientated' was his. There are pictures of those in his book, as are the type 4 OHC 3-valve, 2-plug heads
Posted: Sat Feb 16, 2008 3:22 pm
by Passatman
Wally wrote:Very good Mike!
That was indeed one of the unique Apfelbeck cylinderhead designs. The opposing valves 'radially orientated' was his. There are pictures of those in his book, as are the type 4 OHC 3-valve, 2-plug heads
Wally where can i get the apfelbeck cylinder head book to buy.