Squish clearance and compression ratio - advice please!

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JanBros
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Re: Squish clearance and compression ratio - advice please!

Post by JanBros » Thu Jul 26, 2018 12:46 pm

for performance it is better to have parallel squish (and no radius at the edge of the bowl, Jan Thiel has tested this extensivly at Aprilia) . I only put tangent as a possibility as that is what some people want.

17° surely is a lot :shock: from memory mine are amways arroung 10°
but it all depends on the correct radius offcourse.
You know it's cold outside when you trip over dog shit instead of standing in it.

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JanBros
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Re: Squish clearance and compression ratio - advice please!

Post by JanBros » Sat Jul 28, 2018 10:15 am

ok, just measured a KR1 piston :

crown height is 3mm
gives a radius of 132.17
with 0.8mm squish gives a tangent angle of 12.6°
parallalel squish would be 10.4°
You know it's cold outside when you trip over dog shit instead of standing in it.

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