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47Jag



Joined: 26 Jun 2008
Posts: 788
Location: Bothwell, Scotland

PostPosted: Thu Aug 19, 2010 11:11 pm    Post subject: Reply with quote

Peter,

Couldn't the balancer have included the clutch and flywheel when doing the crank? I've never seen it done so I don't know how this is accomplished. I ask because I had a BMC 1800 engine balanced and blueprinted in the 60s and they asked for the clutch and flywheel. The end result was an engine that could rev to 7000 RPM.

Art
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47p2



Joined: 24 Nov 2007
Posts: 1844
Location: Glasgow

PostPosted: Fri Aug 20, 2010 8:14 am    Post subject: Reply with quote

I'm with Art on this one Peter
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pigtin



Joined: 23 Nov 2007
Posts: 1874
Location: Herne Bay

PostPosted: Fri Aug 20, 2010 9:10 am    Post subject: Reply with quote

Fascinating saga Peter, you really don't intend it to get the better of you.
You deserve perfection after all that hard work.

Don.
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peter scott



Joined: 18 Dec 2007
Posts: 3622
Location: Edinburgh

PostPosted: Fri Aug 20, 2010 9:24 am    Post subject: Reply with quote

Hi Don,

I can tell you, there have been times when I seriously did think it would get the better of me and I should sell up and find some less problematic vehicle to spend my time on. Sad

Hi John & Art,

As I understand it they balance the crank alone then bolt on the flywheel and make appropriate corrections to it, then add the clutch cover and rebalance again.

It should work out fine and each element should end up balanced in its own right but if for example the crank was not balanced perfectly then it could be that balance was achieved for the crank and flywheel with neither being balanced individually. If that had been the case then assembling the flywheel 180 degrees out could turn the balanced whole into a horribly unbalance whole.

She is much smoother at high revs now but the little vibration at 1600 just
niggles me.

Thanks for continuing to follow this never ending saga.

Peter
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