[A8] V8 Displacement

[Horace K. Sawyer]

Well, thats a tall order.  : )  You could do plan one:  do a head job only 
where they are removed.  The air passageways of the intake manifold and 
head are ground out, polished smooth, and shaped to improve air flow.  Now 
*how* it is done can be subject to debate.   It is probably possible to 
remove material in the wrong place, take out too much material, not enough, 
or otherwise disturb the air flow, all of which may actually worsen 
things.  Generally, you see some improvement unless the shop doing it is 
completely and hopelessly lame.  Some posit the theory that airflow 
surfaces should be roughed in some areas to create turbulence, swirl the 
air to more or less mix it up -- all for the purpose of obtaining a fuel 
mixture that will burn more efficiently, ergo more power.

Plan two:  do all that, plus remove the engine, pull the crankshaft, rods 
and have all that balanced perfectly.  It seems that stock cranks are not 
perfectly balanced.  Perfecting this has been known to produce marvelous 
results, with longer engine life, and of course increased power.

Expense:  I haven't the foggiest -- but you see it would be substantial 
unless you are doing much of the labor yourself on the remvoval and 
installation.

hk






At 09:57 AM 3/1/01 -0500, Theron J. Bliss wrote:
>      Ok, here's my chance to sound like a complete retard.  I was
>curious about a couple of aspects to increase output of my 3.6 liter
>motor.  I have heard that porting and polishing, and blue printing and
>balancing would greatly improve the output and response of my motor.
>Here are my questions on that:
>What is involved in doing this?
>Will it really make much difference?
>What kind of costs should I expect?  (will I have to sell my kids?)
>
>     Secondly, I had heard that the 3.6 and 4.2 liter motors have the
>same block.  Does this mean I can get 4.2 heads, and bolt those onto my
>motor, and have a 4.2 with 270 +/- hp?
>Do cams do much for these motors?
>
>TIA (from a guy who obviously has no clue.  Hey, I've been a 4 banger VW
>guy all my life)
>
>Theron J. Bliss
>Massachusetts
>1990 V8 Quattro
>198,000 miles
>Lago Blue, Grey Connolly leather
>
>http://sites.netscape.net/theronbliss/homepage
>
>
>
>
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