Part 2: Reading Plugs, pistons, and valves (with Pics)

[Dave Zug]

ever had access to an arthroscope (SP?) I'd like to borrow one of those
babies for a day. With fibre and little PC cameras so cheap nowadays seems
like a great DIY project! Take a $19 PC camera apart, extend the wiring to
the lens , add a dozen strands of fibreoptics to a fibreglass rod for a
light source and shove it down an intake port and maybe into the open valve?
is 0.510" too narrow for one of those lenses?  oops I guess you need a way
to direct the lens to point other directions.. hmmm..

----- Original Message -----
From: Bruce Plecan <nacelp at bright.net>
To: <gmecm at diy-efi.org>
Sent: Saturday, December 02, 2000 8:16 PM
Subject: Re: Part 2: Reading Plugs, pistons, and valves (with Pics)


>
> Ahh, got what ya mean.
> think it's Jegs has a plate with a plug tapped hole in it.
> Then you can scribe a line to show where cylinder lines up per plug,
> supposedly for faster indexing.
> Me, I gota couple 3 packs of shims, a mike, and a magic marker (ie cheap)
> Bruce
>
>
>
>
> > Oh definetly not the place for indexing.. the serious drag guys obsess
> over
> > that level of detail (I've read).
> >
> > I thought the detail would be interesting. While the heads are off
though
> > its good to screw the plugs in and see where they end up, depthwise.
> >
> >
> > ----- Original Message -----
> > From: Bruce Plecan <nacelp at bright.net>
> > To: <gmecm at diy-efi.org>
> > Sent: Saturday, December 02, 2000 7:19 PM
> > Subject: Re: Part 2: Reading Plugs, pistons, and valves (with Pics)
> >
> >
> > >
> > > In anything on the street indexing really isn't a HP issue, IMO.
> > > I does give ALOT more uniform plug readings.
> > > The side electrode when positioned just right in a SBC can mask the
burn
> > > pattern for 1/2 the plug.
> > > Plugs should be in and out often enough that there is no carbon
**build
> > up**
> > > on the exposed threads.  Also, if the head sees and anti-seize from
time
> > to
> > > time treats the plug enough for it not to stick with AL heads.  I've
> even
> > > been known to use a little AS on iron headed engines where the plugs
are
> > > changed alot
> > >
> > > Also, be advised, AS is an insulator, and when used in excess can
cause
> a
> > > miss
> > > Bruce
> > >
> > >
> > >
> > > > The only thing I have to contribute is that I've read that the plug
> base
> > > > should be exactly flush with the lowest point of the comb chamber
> entry.
> > > ie
> > > > there should be no 'thread pit' for carbon to collect in regardless
of
> > how
> > > > much male plug threading is exposed on the 'thin side' of the plug
> hole.
> > > > Indexing with spacers without considering this leaves compeditors
who
> > have
> > > > indexed thru plug selection (buy 200, find the ones that thread in
> > PERFECT
> > > > indexed position, sell the rest) with an advantage, however small.
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: Shannen Durphey <shannen at grolen.com>
> > > > To: <gmecm at diy-efi.org>
> > > > Sent: Saturday, December 02, 2000 5:51 PM
> > > > Subject: Re: Part 2: Reading Plugs, pistons, and valves (with Pics)
> > > >
> > > >
> > > > > I see a problem.  Piston 2 is in the wrong spot!  It should never
be
> > > > > between 2 others in a sb chebbie... : )
> > > > > Shannen
> > > > >
> > > >
> > > >
> > >
> >
>
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