QUOTE(porschetub @ May 30 2017, 05:40 PM)
QUOTE(jcd914 @ May 30 2017, 05:12 PM)
The earlier 2.0L bus heads are "oval port", the same as 914.
Not sure when the change over to "square port" heads (really rectangular ports)
My 78 2.0L bus had the "oval port" heads although some parts sources indicated they should have been "square port" heads.
Jim
Have seen oval port heads from 2 litre bus I have one in my stash,if I remember correctly they have rather small valves compared to the 914,the 1.8 bus heads seem to have largest valves of the bus heads I have got.
All the bus heads I have are from ROW carbed engines so there may be a difference in spec to the US ones.
Thanks for the response my friend. The heads are currently at a local shop (Xtreme Cylinder Heads) in Palm City, FL being rebuilt with 42mm intake and 36mm exhaust valve. Xtreme specializes in air cooled Porsche and VW heads. Estimated cost is between $500-$600 for the work plus the cost of the valves and springs which I will provide. I ordered the valves and springs from European Motorworks in Hawthorne, CA.
The original valves were 37.5mm and 33mm so you're right, rather small for my application.