Re: Extrude Hone

[PDQSHIP@aol.com]

In a message dated 95-09-30 20:07:13 EDT, you write:

>There's some debate over whether polishing (ie Extrude Hone) is a 
>good thing on throttle body injected or carbureted intake manifolds.  
>The as-cast rough surface is thought to keep the fuel suspended in 
>the air better, for a more uniform mixture.  On port fuel injected 
>cars, such as most recent Audis, this isn't a concern since only air 
>flows through the intake, with the fuel sprayed in directly above the 
>combustion chamber.
>   -Rich

Correct sir....  A TBI or Carb system should not use EH, but instead a swirl
port would be a better move.....   But in the head itself (after intake),
gains can be had......  and in the exhaust manifolds gains can be had.....
 On both FI and TBI/Carb injection, NJT

Scott