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Motor Size Determination
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volwing
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PostPosted: Sat Jul 23, 2016 4:32 am    Post subject: Motor Size Determination Reply with quote

What visable difference is there between a 1600 and 1776? Is the spacing between the cylinder studs and the cylinder fins a clue?
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volwing
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PostPosted: Sat Jul 23, 2016 5:15 am    Post subject: Re: Motor Size Determination Reply with quote

This is #2 cylinder of my motor in question.
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Glenn Premium Member
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PostPosted: Sat Jul 23, 2016 8:44 am    Post subject: Re: Motor Size Determination Reply with quote

You have to remove the head and measure the cylinder.
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Cusser
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PostPosted: Sat Jul 23, 2016 12:34 pm    Post subject: Re: Motor Size Determination Reply with quote

Glenn wrote:
You have to remove the head and measure the cylinder.


Or you can remove the head and measure the piston diameter. Sometimes you can read the stamped mm diameter on the piston crown.
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EVfun
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PostPosted: Sat Jul 23, 2016 1:11 pm    Post subject: Re: Motor Size Determination Reply with quote

I don't know if anyone has done this, but it would seem that you could get some idea if you could semi-accurately measure how close the top of the cylinder is the the head studs at the head. You would be trying to determine if the head was opened up for a larger cylinder.
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modok
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PostPosted: Sat Jul 23, 2016 1:38 pm    Post subject: Re: Motor Size Determination Reply with quote

To detect cheaters without taking the engine apart, displacement is checked with a bubble tool. I don't think you should buy one, but you could borrow or make one

http://www.speedwaymotors.com/Speedway-Cubic-Inch-Tester,703.html
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volwing
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PostPosted: Sat Jul 23, 2016 3:34 pm    Post subject: Re: Motor Size Determination Reply with quote

EVfun thanks for saying what I was thinking. Logic (not always accurate) tells me a measurement taken relating the stud to fins makes sense. Hoping someone could measure a 1776 so I could compare.
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