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Tool Talk Discussion Forum

A stroke measureing tool

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BUDD

11-14-2006 07:56:20




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I want a tool that I can insert into the spark plug hole on a tractor motor and measure the stroke of that motor. I do not want to remove the head! Something real simple. I have searched and called a lot of company's with no luck. I have been told that something like this is out there, but I am not able to find it. Does anyone have an idea on this?
BUDD




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BigMarv1085

11-15-2006 05:25:56




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 Re: A stroke measureing tool in reply to BUDD, 11-14-2006 07:56:20  
Do you have access to a depth guage?



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Easy1

11-15-2006 03:54:04




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 A cloth tape measure! in reply to BUDD, 11-14-2006 07:56:20  
The steel tapes hurt when you retract them....



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pllr

11-14-2006 10:49:33




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 Re: A stroke measureing tool in reply to BUDD, 11-14-2006 07:56:20  
hmmm, what happens when you end up on top of the high part of the domed piston??? probably not quite so accurate??? may show a false shorter stroke...



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Butch(OH)

11-14-2006 17:54:59




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 Re: A stroke measureing tool in reply to pllr, 11-14-2006 10:49:33  
The top of that dome better be travelling the same distance up and down as the flat part or that poor piston is going to have a very short life span, LOL



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Wayne in Tx

11-14-2006 10:15:22




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 Re: A stroke measureing tool in reply to BUDD, 11-14-2006 07:56:20  
Just out of curiosity --- what do you want to know the stroke for? I have used a dial indicators to obtain the stroke on engines and cylinders. A good dial indicator can also be to determine runout on shafts, discs and with the attachments that are available measure the "flatness" of a surface. But any stick or rod would work if you are not trying to be "machinist" acurate.



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BUDD

11-14-2006 10:23:26




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 Re: A stroke measureing tool in reply to Wayne in Tx, 11-14-2006 10:15:22  
Wayne in Tx Tractor pulling. We want to make a rule that reads no stroking. A rule is no good without a way to check it. We do not want to tear into the motor to check.

BUDD



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Wayne in Tx

11-16-2006 05:55:02




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 Re: A stroke measureing tool in reply to BUDD, 11-14-2006 10:23:26  
Thanks for the explanation. I'm not sure that a dial indicator through a spark plug hole would work on all engines. I wouldn't want to be involved in a disputed over a "win" without some pretty accurate tool!!



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Animal

11-14-2006 13:15:08




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 Re: A stroke measureing tool in reply to BUDD, 11-14-2006 10:23:26  
I know of the tools your talking about, check with the circle track guys they use them all the time. But if you are supposed to be running stock why not use the factory compression specs?



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Butch(OH)

11-14-2006 18:04:20




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 Re: A stroke measureing tool in reply to Animal, 11-14-2006 13:15:08  
The tool that Animal speaks of does not measure stroke but measures cylinder displacement. Problem is that an over bore kit make more displacement just as a stroker crank does so you wont know which has been done. Another problem is that you must remove two push rods to use it.



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TimV

11-14-2006 09:23:15




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 Re: A stroke measureing tool in reply to BUDD, 11-14-2006 07:56:20  
Depending on how precise you need to be, a wooden dowel works fine. Mark it at the bottom of the stroke, then again at the top, and measure between.



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BUDD

11-14-2006 09:56:35




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 Re: A stroke measureing tool in reply to TimV, 11-14-2006 09:23:15  
TimV That sounds good, but will not work as it will need to make an angle through the plug hole.

BUDD



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