RE: Extrude Hone on an Intake Manifold?

["Dupree, Jim" <dupree@alldata.com>]

While building a 3.4.liter Porsche Turbo engine we talked with many
different professionals and concluded that in a turbo application it was not
worth the money. Even someone at Extruded Hone said it would have limited
performance increase on a turbo. I don't know how well designed/produced
Audi's manifolds are to begin with, the Porsche manifolds we were using were
well designed/produced to begin with so that had some bearing on our
decision.
Jim Dupree

		-----Original Message-----
		From:	Marc A Swanson [mailto:mswanson@cisunix.unh.edu]
		Sent:	Tuesday, August 31, 1999 4:33 PM
		To:	quattro@audifans.com
		Subject:	Extrude Hone on an Intake Manifold?

		I know this topic just came up on the list, but the
consensus seemed to be
		that some sort of polishing or honing was good.  I called up
Jet-Hot and
		found out that they don't coat the inside of intake
manifolds anymore.
		They gave some odd reasons but it sounded like their methods
didn't coat
		the entire inside properly.  I looked at Extrude Hone's
website
		(www.extrudehone.com) and after a bit of searching found a
not so
		current price sheet for Intake Manifold work.  Prices seemed
steep.  They
		ranged from $200-800!!  Anybody done this to an intake
manifold??  Is it
		worth it?

		Thanks
		-Marc-
		87 4kcsq  awaiting turbo
		87 5ktq   donor