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Thread: weight balancing connecting rods
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03-27-2017, 07:37 AM #16
It's just another way to lighten the piston . Four stroke's you don't want to make any oil traps , so you mill the beam on the inside . Two strokes you don't want to add to the crankcase volume , so you mill a slot on the outside .
And yes , to weight match a set of rods , you weigh the big and little ends as well as shoot for an overall that match's your lightest rod .
The cutters are not cheap , but you can taper bore 20 gram's out of the pin's without losing it's integrity ...
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FORBESAUTO liked this post
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03-27-2017, 07:45 AM #17
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03-27-2017, 07:48 AM #18
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03-27-2017, 06:13 PM #19
Dewitt DeWeese (boatworks) taper bored me a set decades ago (78G).still run them to this day in drag 2.5
"Whacker Smacker" #561 IHBA M/E div1 2007& 2006 first looser champion
2007 Sportsmen Driver of the Year
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03-27-2017, 09:56 PM #20
MIne are at 81 grams.
If I don't ask any questions, I'll never learn anything.
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03-28-2017, 02:10 AM #21
Drilled rods! Awesome. I always wanted to do that but was afraid of making a 5 cylinder powered fly cutter! When you drilled the holes did you use a flapper wheel or swizzle stick to polish and radius the holes to remove the stress risers? They look great by the way.
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03-28-2017, 07:47 AM #22
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03-28-2017, 07:53 AM #23Bud Conner "Heathen" "Defending Our Constitution"
FOR ALL ENGINE APPLICATIONS
DRY Film Lubricant for Piston Skirts & Cranks + Thermal Barrier Ceramic Coatings for Piston Tops, Combustion Chambers, Valves etc !!
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