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12-28-2022, 03:18 PM | #21 |
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Re: Weighing and balancing of connecting rod, pistons, rings, wrist pin
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12-29-2022, 05:08 PM | #22 |
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Re: Weighing and balancing of connecting rod, pistons, rings, wrist pin
Pete, I was hoping someone might be willing to put up a video of spinning up a crank or even a show and tell on balancing rods!
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12-29-2022, 11:26 PM | #23 | |
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Re: Weighing and balancing of connecting rod, pistons, rings, wrist pin
Quote:
Minor details will vary with type of engine and model of balancer. https://youtu.be/zwDRGNNl5qk |
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12-29-2022, 11:50 PM | #24 |
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Re: Weighing and balancing of connecting rod, pistons, rings, wrist pin
Follow up:
I balanced the connecting rods (off by 8 grams) pistons (off by 6 grams) wrist pins ( off by 7 grams) and the connecting rod end caps (off by 12 grams) That's a total of 33 grams that i zeroed out. l used a scale that claims it was accurate within 1 gram. i used a scale and did not use the balancing tool that weighs the ends of the rods separately. This may not have been the best way, but it is certainly better than the way it was in the engine before i took it apart. |
12-30-2022, 12:04 PM | #25 |
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Re: Weighing and balancing of connecting rod, pistons, rings, wrist pin
Thanks Pete, interesting video.
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12-31-2022, 12:40 AM | #26 |
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Re: Weighing and balancing of connecting rod, pistons, rings, wrist pin
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I was wondering if anyone was going to do a modern 2up 2down motor. How did that thing run? |
12-31-2022, 11:56 AM | #27 | |
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Re: Weighing and balancing of connecting rod, pistons, rings, wrist pin
Quote:
We had issues with ignition and injection in the car and that sidelined the project. The plan is to either run it in a Miller 2 port or another flathead, but that will be determined later. John
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01-02-2023, 01:32 AM | #28 |
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Re: Weighing and balancing of connecting rod, pistons, rings, wrist pin
It seems as though what I have felt in decelaration is the engine rpm passing through a resonant frequency? So if the rotating mass is lightened does this change the resonant frequencies to slightly higher rpms. Has anyone spun up a burtz rotating assembly ? And determined where the resonant frequencies are????
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