Ohhhhh I am so nervous about asking this dumb question but here goes. What do you add, multiply etc ti understand the size of a vw motor. 1915 cc 94mm this and 69 stroke that, etc
How do you figure it out?
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It's of course a formula, but here's the easy way; http://www.cbperformance.com/v/enginecalc.html plug in the numbers and voila! Al
It's not hard. The formula is pi times r squared (that's radius of the piston) times the stroke, then times the number of cylinders.
Pi is a constant 3.14 so let's divide all mm numbers by 10 to get centimeters.
You have a 94 mm diameter piston which is really 9.4 cm. so the radius is 4.7cm.
4.7 squared is 4.7 x 4.7 which equals 22.09 square cm.
So, pi x r squared is 3.14 times 22.09 and that equals 69.3626 cubic centimeters
and that is the area of the top of the piston.
Stroke given was 69 mm which is 6.9 cm. so the volume of one piston's stroke is 69.3626 times 6.9 and that is 478.60 cubic centimeters. You have four cylinders in total so multiply that number by 4 and you get 1,914.41 cubic centimeters.
See what I mean about the calculator being easier?
And for a 4-cylinder engine only, with bore and stroke measured in millimeters, the formula can be simplified to:
engine size(in cc) = bore x bore x stroke x 0.00314
But yes, calculators are easier.
Yeah so calculator wins
And now TDR learned something today...or not.
Yes I did. I should have spentore time paying attention in school AND should have taken some courses in engine 101!!!