I guess I have to do more homework cause now I'm really confused: I thought the distributor on a 4 stroke spins at 1/2 the rate of the crank since the cam gear is 2x as large as the crank gear. If th
Not trying to confuse anyone. But basically the spark fires every time the piston approaches TDC. It does this on both the compression stroke and the exhaust stroke. This is why you experience the ba
Author: "Hanlon, Bill (ISS Houston)" <bill.hanlon@hp.com>
Date: Tue, 16 Mar 2004 13:22:28 -0600
Your "one spark per revolution per cylinder" may be true of late model engines that get their timing info from a crankshaft based mag pickup, but most 4 cycle engines with distributors fire "one spar
My motorcycle fires on every stroke, and the V-6 with three coils I used to have fired on every stroke, but I'm pretty sure the old six in my truck only fires on the compression stroke. I know the V-
Sorry the 2-stroke thing had me thinking motorcycle engines again. They do fire every stroke, so do crank driven distributors, cam driven only on the compression. Sorry... -- Scott H. Zekanis zman@ku
You guys are confusing me. If you have a six cylinder engine the coil will fire every 60 degrees of crankshaft revolution. A v8 every 45 degrees of crank revolution. The little bumps on the distribut
Author: "Hanlon, Bill (ISS Houston)" <bill.hanlon@hp.com>
Date: Wed, 17 Mar 2004 07:51:26 -0600
You are missing the fact that the distributor (and the camshaft) turn at 1/2 the speed of the crankshaft. Therefore on a V8 the coil fires once every 90 degrees of crankshaft turn. This does equate t