Date:         Fri, 28 Dec 2001 22:11:35 -0800
Reply-To:     vgonman@EARTHLINK.NET
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         "Sean B." <vgonman@EARTHLINK.NET>
Subject:      Re: higher octane needs
Content-Type: text/plain; charset="us-ascii"

The only correction I can make is that most 2.0L VW in-line 4 motors also
use knock sensors (I wouldn't exactly call all of them "high
performance"). I know my TiiCo motor uses one. I think the main 2 reasons
to use a knock sensor are 9:1 and higher compression, and use of forced
induction (turbo/supercharger). Most automaker these days are probably
using knock sensors just to keep their supposed "high efficiency" (high
compression) motors from blowing up when you get a batch of bad gas.


Sean B.
'90 V'gon, "Happy Bus", pseudo Wolfy
Torrance, CA
Join the TiiCo registry at
HTTP://www.vgonman.com

On Fri, 28 Dec 2001 19:47:43 +0000 Paul Mayfield
<paulmayfield@EARTHLINK.NET> writes:
> Please correct me if any of this is untrue/incorrect!
>
<SNIP>
> I've heard some high performance
> high compression engines have preignition sensors
> that adjust to lower power levels when 87 octane is used.
> (porsche,corvette?)
<SNIP>