Re: heads

[Dan Bocek <dan@di.com>]

> Dan, The head requires only the hogging of a well versed VW race shop... the
> 10v head is basically the same casting philosophy of the vw 8v, i.e. it does
> not suck air well...  Basically, the route to go is a straight port to the
> valves (vs a restrictive curve in the stock casting).  The valves need only a
> competition cut (I used a 5 angle), because the sodium valves are about
> $80/valve not including the seat mods, so I stayed away from that idea.  I
> did the polishing myself with a dremel setup, with the fullest of intentions
> to do the Extrud hone process next spring.  With the 272 schrick cam the head
> definitely breathes better, I'm looking seriously about cracking the intake
> for some porting there too...  The name of the game, is to do the porting b4
> the EH process.  Have you done the IA mod yet?

Don't have the IA mod - have the ABT instead.  This consists of a modified
computer akin to those provided by Ned Ritchie, but instead of a stiffer
wastegate spring, there is a hose which applies manifold pressure via a
regulator valve to the back side of the wastgate diaphram, so that you can
vary the point at which the wastegate opens from inside the cockpit.

I just got my head back from Fumio Fukaya Enterprises - ever here of them? 
They're sopposedly big in the VW community.  Anyway, I went with a bump of
1mm on both intake and exhaust valves, as well as a full polish all around
and a port on the intake.  I also bought the 272 Schrick cam.  I'm going
to abandon the stock turbo in favor of the one they're putting onto the
Porche tuned Audi RS2's.  Can you think of anything else I should do
before I put it all back together?  I was thinking maybe I should have the
exhaust manifold extrude honed, but have heard a lot of negative things
about the extrude honning process; what do you know about it?  BTW, the
car is an '83 TQC. 

                                                         Dan Bocek
                                                         dan@di.com