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Old 04-30-2007, 12:46 AM   #1
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Default Why did my thread get deleted?

In the Performance and Brainstorming board earlier tonight I posted about my LN3. I felt it was clean and didn't offend anyone, and it really belonged on that board. It was not moved. I'm certain it got posted because I still have an open tab with it, but I can't find it on the board, nor the '87-91 board. I'd like to know why it was deleted. Did it really need to be?

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Hey guys. I'm back, and dealing once again with my LN3 block/internals dressed as a Series 1 L67...

As we left off, my harmonic balancer keyway and key were really chewed up. This created like a 1'' timing offset (don't know how many degrees that is), making the engine feel like it had 30-40 hp or so. Don't know if it caused any other damage inside. Anyway, as I understand it, the issue is that an LN3'* rotating assembly is internally balanced, while the L67'* rotating assembly is externally balanced.

The L67 is not balanced without the harmonic balancer. Neither the rotating assembly nor the balancer are balanced by themselves, but are balanced with each other.

With this being known, my issue which lead to the eaten up keyway/key and the vibration at idle are due to the weight of the L67 balancer on the LN3'* rotating assembly.



The L67'* balancer is on the left, LN3 on the right. Notice the "hammerhead" weight of the L67 and how much bigger it is.

I spoke with the owner of Dale Manufacturing, a rebuilder of harmonic balancers and Corvair parts dealer (if you're into those...). I described my issue and what I wanted, pretty much that I wanted an L67 balancer than acted like an LN3'*. He couldn't like build me one, saying that they're pretty much a one piece assembly and are already difficult to rebuild. At any rate, we got talking about the "hammerhead", and how in theory, though not a precise operation, I could Dremel the L67'* hammerhead, make it about the size on the LN3'* by eyeballing it, and I would be set. The L67 balancer does have some holes drilled in it for added balancing, which I will take into consideration. It won't be precise at all but I'll be a lot better off than otherwise.

Any comments? Thanks guys.
(that was my thread)
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Old 04-30-2007, 12:49 AM   #2
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Old 04-30-2007, 12:56 AM   #3
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Thanks for the link. I'm surprised though there isn't a "moved" notice in P/B. And is it really not related to performance/brainstorming?
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Old 04-30-2007, 12:56 AM   #4
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I mean, we've got sticky threads on making an L36 into an L67, why not an LN3 into an L67?
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