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@bright.net>
> To: <gmecm@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@grolen.com>
> > > To: <gmecm@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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> > >
> >
>
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