Re: "Blueprinting" VW heads

HI Randall,
Actually Bob Hoover's blog indeed was the inspiration for me
deciding to explore doing this to my own engine. But it was left to
the reader to fill in the exact details on how he performed the fin
cleanup on his cylinder heads (lots of Youtube videos on porting/
polishing but not on this). Hoover did say he used a pneumatic riffler
but I do not have that tool. The other suggested tool was a hand saw,
but there was an area where my saw could not quite break through and
was about to resort to using a rubber mallet to help the tool punch
through but then decided to seek other options...

Geoffe

-74 Super Beetle

On Apr 8, 8:38 pm, Randall <rap...@xxxxxxxxxxxxx> wrote:
Geoffe Elias wrote:
Hi Volks,
  I'm aware of the importance of keeping head chamber volume equal
across all the 4 cylinders as well as the benefits of a port and
polish job.  But I am wondering about the techniques of cleaning up
the exterior fin area of the stock cast VW cylinder head.
Specifically, I would like to clean up the casting imperfections
(casting flash?) between each of the fins.

  I look "down" into the head fins (from the perspective of the air
coming from the fan shroud) and I see places where it would seem that
the VW engineers intended for air to blow through.  But deep in those
places are blockages by random "flash" (like the plastic flashing have
to trim away when you build a model airplane or such). My first
impulse was to get a small flat-headed screwdriver and rubber
mallet...but that didn't seem wise.  What tool should I use to get
deep in there and clear out those places between the fins.

  I know it seems anal but I am trying to blueprint the cooling design
of my 1776cc Type 1 engine (with Webcam 163 camshaft) so that I may
safely run a higher CR (9.2:1) while running pump (Premium) gas in
California.  I am running the late Doghouse fanshroud with all cooling
flaps and all the other various cooling tin that everyone forgets
about.

  I am also exploring getting heat barrier coatings applied to the
head combustion chamber by these guys:
http://www.replikamaschinen.com/ If the cost of getting those
coatings done is less than $300, I am certainly going for it.

  Anyways, thanks for any advice on head fin cleanup as well as
highest CR for my engine.

Regards,
Geoffe Elias

'74 Super Beetle

The link brings up all posts on RAMVA by veeduber (AKA Bob Hoover)
containing the phrase "casting flash".http://groups.google.com/groups/search?hl=en&as_q=&as_epq=casting+fla...

Below is what the Google Groups search page looks like.  It's pre-filled
with: group = rec.autos.makers.vw.aircooled and author  = Veeduber.  For
your particular search you would enter in the second box where it says
"this exact wording or phrase:"  casting flash     to return the same
results as the link above.http://groups.google.com/groups/advanced_search?hl=en&safe=off&q=grou...

Also, at Bob Hoover's Blog, once you get to the link below, use your
browser's search capability to do a search of the phrase "casting
flash".  As an added bonus, the first page of the blog (dated Wednesday,
August 1, 2007) discusses a topic related to your other question about
heat barrier coatings.http://bobhooversblog.blogspot.com/search?q=casting+flash

-- Randall

.

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