Posted by jdemaris on November 15, 2009 at 09:59:42 from (67.142.130.11):
This is the last follow up to my Deere 1010 crawler that I ran for many years with a 6 cylinder distributor with a four-cylinder cap stuck on it (1010 is a four cylinder engine).
I put the distrutor back on today with the four-cylinder points-cam stuck in. It runs better then ever, since I've owned it. Engine basically sounds the same but seems to have maybe 20% more power. I can charge a dirt-bank now in 2nd gear and lift with a full bucket of hard-pan and rock. Before this, I could just barely do that in 1st gear.
So, if somebody ever asks you a stupid question - like "can a 6 cylinder distributor run a 4 cylinder engine" - the answer is "yes."
I did the math and it seems this is how it ran. When it had the 6 cylinder distributor on it, and I timed it with a timing light hooked to #1 cylinder, it resulted in this. Firing order is 1-3-4-2. Timing spec is 26 degrees before TDC at full RPM. So, #1 was firing at 26 degrees BTDC, #3 was firing at 56 degrees BTDC (30 degrees overadvanced), #4 was firing properly at 26 degrees BTDC, and #2 was firing at 56 degrees BTDC (30 degrees over advanced).
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