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Size / .15s

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Size / .15s

Post  TopBannana on Tue Jul 21, 2015 8:58 am

I was wondering if the teedee, medallion 15's pis./cyl. were the same as others out there.
A Traxxas .15 (for cars) it has a piston sleeve and Alu. block but is it the same size?
Or an OS MAX 15
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Re: Size / .15s

Post  Cribbs74 on Tue Jul 21, 2015 12:31 pm

No,

Way too many variables. Just because it says .15 it could actually be more or less. The will vary in diameter, length, skirt, pin, and rod length. Possibly even more, that's just what popped in my head at the moment.
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Re: Size / .15s

Post  TopBannana on Tue Jul 21, 2015 12:35 pm

Cribbs74 wrote:No,

Way too many variables. Just because it says .15 it could actually be more or less. The will vary in diameter, length, skirt, pin, and rod length. Possibly even more, that's just what popped in my head at the moment.

Yea it can have same displacement but in different shapes but not even the same displacement?
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Re: Size / .15s

Post  TDbandit on Tue Jul 21, 2015 1:11 pm

Yup Cribbs is exactly right. no .15 unless it's a clone and even they vary a tad is the same from one manufacturer to the next. Bore, stroke, wrist pin placement, rod length ect. all play a factor in displacement. You can have long stroke .15's which has a smaller bore to stroke length if (I got it right) short stroke .15's has a larger bore to stroke length or square bore .15's (Stroke matches the bore) they all vary Even the Cox .15's are not exactly .15's Displacement is a round off game. A 250cc dirt bike for example, they show on the side of the jug 249.995cc plus or minus it's all rounding to the nearest decimal point.
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