Gentlemen,
I saw that device, in fact we stuck it in the cylinder and it would not
work. It seems that on short stroke engines (like mine) that the device
does not go in far enough to allow the arms to expand. The gentleman who
has it is/was a car tech inspector but he was very helpful and tried it on
the bike.
Regards, Tom
----- Original Message -----
From: <ARDUNDOUG@aol.com>
To: <land-speed@autox.team.net>
Sent: Saturday, December 16, 2000 9:46 PM
Subject: Re: Verifying Displacement
> In a message dated 12/16/2000 5:42:45 PM Pacific Standard Time,
> jbickford@volcano.net writes:
>
> <<
> Tom,
>
> Bruce Johnston had a dial indicator that on engines with the spark
> plug hole centered in the cylinder bore, would measure the bore.
>
> It would go through a 12mm and maybe a 10mm spark plug hole.
> No need to use the ATF. When Bruce was killed a few years ago, I
> don't know if it went to the SCTA or not. Dan Warner may know if it
> is still available.
>
> If it has to be CC'd with oil I would have them use 2 stroke or a
synthetic
> engine oil. The engine will purge that better than the ATF, especially on
> turbo motor, less mess.
>
> Jim
> >>
> Group,
> I use a similar device that I saw Elmo Gillette use on the Arduns he
and
> Jim Lattin ran in the 70's and 80's. It works very well and is made by
> cutting a long groove (keyway) in a 12" length of 1/4" or 3/8" steel rod,
and
> hinging a piece of 1/8" steel rod in such a fashion that when the smaller
rod
> is placed across the cylinder bore the hinge point with the larger rod is
> directly under the spark plug hole.
> When the assembly is retracted from the cylinder the small rod folds
into
> the groove on the larger rod, allowing the assembly to be removed through
the
> spark plug hole. When placed into the cylinder through the spark plug hole
> (piston near bottom-dead-center) the small rod is initially folded into
the
> larger rod, then folds out to a 90 deg angle with the large rod when the
> assembly touches the top of the piston. The two rods are hinged is such a
> manner so that their included angle never exceeds 90 deg.
> Since the small rod is the exach length as the cylinder bore, once the
> operator determines that there is no slack between the smaller rod and the
> bore, he measures the smaller rod and verifies the bore.
> Stroke is measured directly using a graduated rod or small tape
measure.
> As was mentioned previously, this method only works on an engine where
> the spark plug hole is directly over the bore such as the case is with
most
> Hemi's.
> Ardun Doug King
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