Re: [T3] 1500S domed pistons

[John Fessenden "fess" <fess-vwtype3.org@fess.org>]

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On Nov 6, 2004, at 8:20 AM, Jim Adney wrote:

> On 5 Nov 2004 at 23:30, eggmeg@netzero.net wrote:
>
> > I too have the 1500S domie pistons. While my car is not on the road
> > yet, how long can I drive it on 90 octane before it bursts into
> > flames?
>
> > Oh, the humanity!!!
>
> You may be fine. It's useful to learn to recognize knock. It sounds  
> like a
> handfull of marbles being slowly dribbled into a metal wastebasket. If  
> you have
> it, you'll hear it at low RPMs when you give the engine full throttle.  
> If you
> don't hear this you may not have a problem.
>
> It's never a problem at high speeds or cruising, unless your timing is  
> WAY out
> of whack (way too advanced.)
>
> If you hear this, you can just let up on the throttle at low RPMs, or  
> you can
> try adding something that can up the octane.  One thing that can help  
> here is
> gasohol, or you can just add alcohol to the gas. Octane enhancers are  
> also sold
> everywhere, but don't get carried away; use only as much as it takes  
> to make
> the knock go away.
>
> The alternative requires an engine rebuild.

or you could try out this safeguard knock sensor, and tell us what it's  
like:

   
http://www.aircooled.net/new-bin/viewproductdetail.php? 
keyword2=IGN0007&cartid=1105200430817702

*grin*

ok, it's probably too expensive.  but it just seems so cool.  it auto  
retards the
timing on individual cylinders to prevent knock.

I also saw something somewhere where I guy bought a plain knock sensor  
for some
late model car ( just the sensor.),  and rigged up a circuit off it to  
show a light in the dash
when there was knock.  Unfortunately I can't seem to dig up that link.

[ since I got this hotrodded engine, I've been concerned about knock,  
and such.
and I don't know that I know what it sounds like. ]

--fess

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