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Old 10-28-2008, 05:59 PM   #41 (permalink)
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Old 11-05-2008, 06:47 PM   #42 (permalink)
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240 degrees a three cylinder fires one.
180 degrees a four cylinder fires one.

every engine is designed to counter resonance and balance. Unless your a fan of vtec , inline fours and good vibrations (some peoples brains don't know what reality goes missing anyway...)

here is how to do it:
all you have to do is twist the crank with your bare hands to even it up a bit for when you want to switch to 3 cylinders.
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Old 11-18-2008, 04:38 PM   #43 (permalink)
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Tiny Lund put on quite a show!

Originally Posted by CobraBall View Post
A complete cycle (intake, compression, power, exhaust) on all 4 cycle engines is 720 degrees or two revolutions. 4 cylinder engines fire every 180 degrees for a total of 720 degrees. 6's (even fire) -120 degrees, V8s-90 degrees
All this talk of crank geometry and changing this-and-that brings back some unusual memories. In the very early 70s, NASCAR's Tiny Lund was featured at a Friday night Sportsman event in Raleigh, NC. His reason for running? A "flat crank" Chevy demo-racer. The full race-prepped Chevy sedan ran a small-block BowTie engine with a flat crank configuration...running like a large 4-cylinder engine (with their greater torque-making characteristics ) ... enabling completely different gear ratio requirements. Of course, the cam was relobed...as was the ignition sequence. And the sound! Like a giant 4 banger! Low RPMs, lots of torque, it was most impressive! And untouchable by the local boys....

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