Correct me if I'm wrong

But i've driven my Dad mad with this and would like a third opinion from the techy Gits here

But say we've got a 1litre bottle and a 100ml glass and a 250ml Glass.

To fill the bottle up with water from the 100ml glass it would take 10 glasses to fill with the ratio being 10:1

With the 250ml glass it would only take 4 glasses to fill with the ratio being 4:1

Now onto real stuff enough wee wee glasses

So by fitting forged piston or fitting a thicker head gasket.You are increasing the volume (think back to the glass)

So it takes less spaces to fill the desired area

To raise the Ratio you would either skim the head or fit raised top pistons
.

So it would take more spaces to fill the desired are hence the ratio

Correct me on anything expect spelling and the like

Thanks Daniel

 

Not really, by adding water into your bottle you're not compressing anything just changing the volume.

Following your example, take your 1 litre bottle and put the top on. Now squeeze the bottle to half its original size. Your comp ratio is now 2:1. Now squeeze the bottle to a tenth of it its original size, your comp ratio is now 10:1.

To affect a cars comp ratio you either have to change the size of the cylinder by using different sized pistons or gaskets etc or change the stroke by using a different crank.

 

Just answered this on another site for you Daniel.