for each full revolution of the crank (360 deg), how many power-strokes do you have on a 4-cylinder boxer?
1?

or, to be more precise, how many OPEN intake valves do you have per full revolution of the crank? (ignore overlap, only full open valves).

Andy

2

the four strokes are (officially) Suck - Squeeze - Bang - Blow. in that order.

each cylinder fires every two revolutions of the crankshaft == 1 revolution of the camshaft.

so you get half as many of each stroke in a crankshaft rev as there are cylinders. (4 cyl == 2 intake, 2 compression, 2 power, 2 exhaust). you get you cylinders' complement in a complete revolution of the camshaft ( == 2 crank revs).

and since a power stroke 'makes power' over about 120 crankshaft degrees, this is why 6's are so smooth - you have 1 cylinder making power at all times.

thank you sir!

Andy

Suck - Squeeze - Bang - Blow

Ahhhhhh Yes it is Friday night

Cheers
Kerry

I am definitely gonna have to remember that!

-Chris

sucksqueezebangblowsucksqueezebangblowsucksqueezebangblowsucksqueezebangblowsuck
squeezebangblowsucksqueezebangblowsucksqueezebangblowsucksqueezebangblow

OH BABY



BRUCE

So, Bruce, how many RPM can you type?


cheers,

Jeroen

More important, how long can it turn before the whole thing lets go

Dave

Think I had a girlfriend like that once...



Ken