Chris,
This is interesting. I can't imagine who to ask about the behavior of flame
fronts vis a vie compressed versus non-compressed gases.
I was surprised last week when I added up the advance numbers for the BJ8
and it was like 47 degrees total, but there must be an explanation for it
when all of the other parameters among the distributer models are so
similar.
Just out of curiosity, did you experiment with long reach plugs or hogging
out the combustion chamber to achieve a flush insertion as well? I will be
discussing this with some other folks and need to cover the bases..
Thanks!
Dave
frogeye@porterscustom.com
Porter Customs 2909 Arno NE
Albuquerque, NM USA 87107
505-352-1378
1954 BN2 1959 AN5
Porter Custom Bicycles
cars:
www.britishcarforum.com/portercustoms.html
gallery:
http://picasaweb.google.com/porterscustombicycles/PorterCustomBicyclesStuff
blog: http://porterbikes.com/
_____
From: Chris Dimmock [Healey] [mailto:austin.healey@gmail.com]
Sent: Tuesday, October 05, 2010 1:55 AM
To: Healeys; Shop at Just Brits; msalter@precisionsportscar.com;
frogeye@porterscustom.com; bspidell@comcast.net; racarbon@verizon.net
Subject: The AEC960 Healey 3000 Cylinder Head spark plug seat and timing
issue
Ok Guys - here is the follow up as promised re the spark plug seat issue on
the AEC960 cylinder head.
I've discussed this on and off for nearly 12 years - we discovered this
issue when I rebuilt my BJ8 in 1998
Yesterday, I pulled out 3 different westlake design cylinder heads - a
Sprite; a 100/4; and a 3000 - and using the SAME spark plug - took a few
pics....
Simply - the spark plugs on "some" 12 port 3000 cylinder heads don't go in
deep enough compared to any other westlake head design.
Which is just wrong....
Here is my take, with pictures....
http://www.myaustinhealey.com/aec960-healey-cylinder-head.html
Fire away.....
Chris
www.myaustinhealey.com
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