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| insight into V4 design and operation |
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| dbvandy:
Hello all! Now that I have the Webster complete (http://madmodder.net/index.php?topic=4413.0) and the Otto running (http://madmodder.net/index.php?topic=4425.0), I am looking toward the next project: designing a V4 OHC from the ground up. I want it to be: completely open design with ball bearings on the crank and cams belt driven and out of bar stock compact as possible square 1 inch bore 1 inch stroke fork and blade connecting rod 90 degree V CDI ignition single carb (or vapor tank) I have a vision of what I want and will start drawing it up in solidworks soon, but what I don't know is this... timing of the pistons and firing order. Cams will take care of themselves when the engine is setup. I plan to model it off the Otto engine cylinder. Any insight or plans to give me some ideas would be appreciated... Thanks guys! Doug |
| jim:
good luck, another thread i'll be following closely |
| andyf:
I've never owned a V4 car, but in the dim and distant past the firing order on my flat four Jowett Javelin was the same as a straight four: 1-3-4-2. My wife's 1970s VW Beetle was the same. There doesn't seem to be any reason why a V4 should differ. I'm looking forward to watching your progress; on your current form it should be running before the end of the month. Andy. |
| DavidA:
Doug, ...completely open design with ball bearings on the crank and cams... That will make for very a interesting crankshaft. I remember the days when replacing the roller bearing big end on a single cylinder bike engine meant much fiddling with pressed taper fits on the crank - pin and the webs. Dave. |
| cuog:
--- Quote from: andyf on March 07, 2011, 03:18:17 AM ---I've never owned a V4 car, but in the dim and distant past the firing order on my flat four Jowett Javelin was the same as a straight four: 1-3-4-2. My wife's 1970s VW Beetle was the same. There doesn't seem to be any reason why a V4 should differ. I'm looking forward to watching your progress; on your current form it should be running before the end of the month. Andy. --- End quote --- ACVW firing order is 1-4-3-2(both cylinders on each head fire one after the other then it goes to the other head) |
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