Compression

[jarred15801]

If i put a aftermarket air filter or exhaust systm on my quad woul it change the compresion ratio?

[RiPPiNiTuP7]

Nope.

[dj416]

nope. the only way to change the comp. ratio is change the piston ot cranhshaft. comp. ratio = volume of cylender compaired to volume of combustin chamber at top dead center. ex; an 11:1 comp ratio means the volume of the combustin chamber is 11 times smaller than the cylnder volume

[OutlawEX]

Originally posted by dj416
nope. the only way to change the comp. ratio is change the piston ot cranhshaft. comp. ratio = volume of cylender compaired to volume of combustin chamber at top dead center. ex; an 11:1 comp ratio means the volume of the combustin chamber is 11 times smaller than the cylnder volume

[Steve-o 400EX]

Originally posted by dj416
nope. the only way to change the comp. ratio is change the piston ot cranhshaft. comp. ratio = volume of cylender compaired to volume of combustin chamber at top dead center. ex; an 11:1 comp ratio means the volume of the combustin chamber is 11 times smaller than the cylnder volume

Man that was a good explanation, a lot better than i coulda put it.:p

[Steven]

The compression ratio in the simplest terms is the cylinder volume with the piston at BDC divided by combustion chamber volume with the piston at TDC.

For example: a stock 400ex

397cc (swept colume) divided by 43cc (combustion chamber volume) is 9.2 or 9.2:1 compression ratio.

In my case 435cc/38cc is 11.5:1

Get it?