Richard,
Thanks, I was curious where you guys think you ought to be indexing your
plugs.
You say "aim the gap to the carbs".
Does anybody else agree with that and why?
When does the sparkplug gap see the carbs or intake port?
Chuck
From: "Richard Schmidt" <[EMAIL PROTECTED]>
Reply-To: [email protected]
To: <[email protected]>
Subject: Re: [F500] Indexing
Date: Sun, 15 Jul 2007 13:56:31 -0500
Chuck,
Look at the pattern on your plugs. A better indication is to look at the
top of your piston. The part of the piston that is washed clean is the
direction you want to face your plug.
You want the open side of the plug facing the direction of the incoming
fuel/air mixture. On the Kawasaki, that direction was towards the carbs.
The Rotax must have a better swirl pattern as I am not seeing pattern on my
plugs and I don't have a tool to inspect the top of the piston. Usually
the
piston inspection is conducted after a melt down. I don't plan on any of
those soon.
Richard
----- Original Message -----
From: "Chuck Voboril" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Sunday, July 15, 2007 10:50 AM
Subject: [F500] Indexing
> So what port are you guys indexing the plug gap towards?
>
> Seems like lotsa choices: intake port, exhaust port, a number of
transfer
> ports.
>
> Chuck
>
>
>
>
>
> >From: Chris Reinhardt <[EMAIL PROTECTED]>
> >Reply-To: [email protected]
> >To: [email protected]
> >Subject: Re: [F500] resistor plugs
> >Date: Sat, 14 Jul 2007 22:11:23 -0400
> >
> >Richard from expereince, I can tell you in a 2 stroke motor indexing
helps
> >a whole bunch in reading the plugs also..
> >
> >CR
> >----- Original Message ----- From: "Richard Schmidt"
<[EMAIL PROTECTED]>
> >To: <[email protected]>
> >Sent: Saturday, July 14, 2007 4:17 PM
> >Subject: Re: [F500] resistor plugs
> >
> >
> >>Dave,
> >>
> >>I am surprised to hear you say that indexing did not make a
difference.
I
> >>had the luck of working with a guy who used to work for Kawasaki when
they
> >>were racing snowmobiles and he said that they had found it to make a
> >>difference. Also I had a conversation with Darcy Ewing (snowmobile
racer
> >>for AAEN) and he also indicated that I should be indexing my plugs.
> >>
> >>What way did you face the open gap ?
> >>
> >>Richard
> >>
> >>----- Original Message -----
> >>From: "Dave Phaneuf" <[EMAIL PROTECTED]>
> >>To: <[email protected]>
> >>Sent: Thursday, July 12, 2007 5:31 PM
> >>Subject: [F500] resistor plugs
> >>
> >>
> >>>A few years back when I had access to a Land & Sea dyno I tried
several
> >>>things
> >>>on a Kaw engine. Played with timing , fuel, oil pump output,
> >>>jetting......
> >>>One of the things tried were a few different spark plugs, never could
> >>>tell
> >>>one bit of difference, not even a hint.. Big gaps, indexing, little
gaps
> >>>"race" plugs, all lead to nothing. I don't even bother to gap the
> >>>things any more, take em out of the box eyeball the end and stick
> >>>em in.
> >>>Given a good enough dyno in a lab somewhere maybe one of those
engineer
> >>>types could find a difference, wouldn't bet on being able to measure
it
> >>>with lap times.
> >>>Dave Phaneuf
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