Compression Ratio Vs Cylinder Fill

General engine tech -- Drag Racing to Circle Track

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Stan Weiss
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Re: Compression Ratio Vs Cylinder Fill

Post by Stan Weiss » Sat Oct 06, 2018 4:45 pm

Belgian1979 wrote:
Sat Oct 06, 2018 2:05 pm
Stan Weiss wrote:
Thu Oct 04, 2018 10:54 am
I would be interested if anyone else did these calculations what they come up with.
Bore = 4.155"
Stroke = 3.5"
Rod = 6"
IVC = 76 ABDC (36/76 - 292 seat-to-seat - 110 ICL)
VE = 100%

cylinder pressure around 47.1" hg @ IVC
What is the projected compression pressure ?
About 407 psi / 828.5" hg

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Mark O'Neal
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Re: Compression Ratio Vs Cylinder Fill

Post by Mark O'Neal » Sun Oct 07, 2018 1:08 am

Caprimaniac wrote:
Sat Oct 06, 2018 2:53 am
Mark, you don’t have a video of that engine in the hoist, do you?
Luckily, that was before the cell phone was invented.

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Re: Compression Ratio Vs Cylinder Fill

Post by swampbuggy » Sun Oct 07, 2018 11:47 am

Well dad gum Mark don't leave us wondering-------WHAT happened with the cranked engine on the engine hoist.... :lol: Mark H.

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Re: Compression Ratio Vs Cylinder Fill

Post by MadBill » Sun Oct 07, 2018 9:33 pm

I'd guess the torque reaction when the throttle was blipped, or even just when it fired if the throttle was partially open, flipped over the hoist. #-o
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