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Old 11-14-2022, 05:03 PM   #1
amishmafia00
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Default Tenaci Flywheel balance

I bought a Tenaci flywheel for my 16V redblock from speedingparts. the site says balanced and I saw drill marks where they had removed some material. I took it to the machine shop with everything else to get it ballanced together anyway. The machine shop called and said that the flywheel is off by 22oz. It sounds like they spun just the flywheel. Are the B230 Cranks externally balanced that the flywheel would be off this much after being "balanced"?
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Old 11-14-2022, 05:10 PM   #2
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No, Redblocks run internal balance. Your pressure plate should be factory balanced separately also.
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Old 11-14-2022, 05:18 PM   #3
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22 ounces sounds like a HUGE AMOUNT. I can't even imagine how it could be that far off even on the most casually manufactured parts.
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Old 11-14-2022, 05:57 PM   #4
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That is WAY off. TTV flywheels are balanced and always spot on when checked
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Old 11-14-2022, 05:58 PM   #5
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22... grams? even still that is a little bit much
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Old 11-14-2022, 06:05 PM   #6
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22... grams? even still that is a little bit much
22oz would be ~623 grams. That’s a lot of weight to be spinning out of balance
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Old 11-14-2022, 06:15 PM   #7
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So I'd suspect some sort of communication issue, or a testing issue.

But to agree with Harlard's first response, all three items (ccrank, flywheel, pressure plate) should be separately balanced, there are no 'known imbalances' that they would be designed to counteract in each other. Although a normal shop can't really independently balance a pressure plate, so it's entirely understandable that they'd mark (to preserve orientation) and balance those as a unit.

But even if it was 22 grams, I'd have a hard time imagining they found something that far off.
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Old 11-14-2022, 06:19 PM   #8
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I'm with everyone else. 22g is bad, 22oz is very much in defective manufacturing and/or measurement territory.
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Old 11-14-2022, 06:20 PM   #9
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Definitely have them remount it and check again, or have another shop check. Is that 22 ounce/inches?
22 grams is understandable, kind of.
22 ounces means there's some major issues. You'd be able to see the parts not mounted concentrically or see wobble in the parts.

Here's what 28 ounce imbalance looks like:
https://blueprintengines.com/product...t-c4-bpp871009

Last edited by culberro; 11-14-2022 at 07:32 PM..
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Old 11-15-2022, 08:28 AM   #10
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He definitely told me 22g. That's my bad, sorry to get everyone excited. He said that was pretty far off and he might expect to see a 2g imbalance. I asked him if it was heavy 180 degrees off from where they drilled to remove material and he said it wasn't quite 180 off.
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Old 11-15-2022, 10:40 AM   #11
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Well, sounds like the manufacturer was asleep at the wheel.
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Old 11-15-2022, 12:20 PM   #12
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Originally Posted by amishmafia00 View Post
He definitely told me 22g. That's my bad, sorry to get everyone excited. He said that was pretty far off and he might expect to see a 2g imbalance. I asked him if it was heavy 180 degrees off from where they drilled to remove material and he said it wasn't quite 180 off.
See if they ran the flywheel again, so make sure it was mounted properly.... then let Tenaci know that their balancing work might be off. These things unfortunately happen when making parts.
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Old 11-15-2022, 04:05 PM   #13
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See if they ran the flywheel again, so make sure it was mounted properly.... then let Tenaci know that their balancing work might be off. These things unfortunately happen when making parts.
I was thinking to have them redo it too.
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Old 11-15-2022, 05:21 PM   #14
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I was thinking to have them redo it too.
Yeah, definitely have them correct that.
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Old 11-17-2022, 07:46 AM   #15
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When i tried balancing mine they found it off as well. I don't remember how much it was, but they definitely found something because i specifically mentioned that it came balanced. The machine shop i took the parts to balanced the crank first alone and then the rest of the parts.
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Old 11-17-2022, 09:51 AM   #16
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I had my JohnV billet flywheel and Spec clutch balanced together, and IIRC that was only off a gram or two. Probably wouldn't have relaly been noticeable without balancing it.

22 grams and you're going to have a soothing back massage feature going on.
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Old 11-17-2022, 11:59 AM   #17
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Which one did you get? We didn't get the full size "pizza" checked, and it's smooth as mother's butter.
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