Unshrouding - was Heron Pistons and Larger Valves

[JShadzi at aol.com]

In a message dated Wed, 20 Dec 2000  5:17:12 PM Eastern Standard Time, 
"Swann, Benjamin R.  (BSWANN)" <BSWANN at arinc.com> writes:

<< 
I'm all ears on this, as I am still contemplating tearing a perfectly good
head apart to achieve supposedly minimal gains.  This is on an 87.5 GT motor
272 cam recipient in to 4KQ with Stebro exhaust.
I would be happy to know that this is really more trouble than it is worth.
Ben
Project GTQ on the backburner.>>

   Ben, with the 40mm valve, there is no need to unshroud in an Audi head 
IMO.  Typically, anything with less clearance than about 3mm would gain 
benefits from unshrouding, in your case it is not going to be worth any power 
for you to go thru all that extra trouble.  HTH,
Javad