Re: [ihc] Re: David's "diesel" 258

["Ryan Moore" <baradium@xxxxxxxxxxx>]

----- Original Message ----- 
From: "John Hofstetter" <hofs@domain.elided>
To: "Steven Stegmann" <steve.stegmann@domain.elided>
Cc: "David Bongo" <dbongo@domain.elided>; <ihc@domain.elided>; "ken.dunnington"
<ken.dunnington@domain.elided>
Sent: Friday, August 20, 2004 11:13
Subject: Re: [ihc] Re: David's "diesel" 258


> On Aug 19, 2004, at 10:18 PM, Steven Stegmann wrote:
>
> > John,
> >
> > I've never done it but have heard of it.  Seems like
> > I've seen that in some race engines too.  It might cut
> > down on the friction???
> >
> > Steve
>
> Steve,
>
> No, it's the other way around. You do the knurling to pistons whose
> skirts have worn excessively. So, the bumps created by the knurling now
> contact the cylinder wall.
>
> John
>
> John Hofstetter
> Ol' Saline
> www.goldrush.com/~hofs
>

But a knurled piston only contacts at the bumps, whereas a non worn piston
contacts in a lot more area, correct/

In that case, wouldn't the knurled piston have less drag than a new one?

-Ryan


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