marki Posted September 7, 2016 Report Share Posted September 7, 2016 Hi All. Just fitted my trigger wheel to my pulley and am now thinking if it should be rebalanced ? I'm in the south west just south of Bristol, does any body have any recommendations ? I'm presuming it'll need doing even though the trigger wheel is balanced. Cheers Mark. Quote Link to post Share on other sites
Guest ntc Posted September 7, 2016 Report Share Posted September 7, 2016 In an ideal world yes but it depends on the revs you will use. Quote Link to post Share on other sites
poldark1 Posted September 7, 2016 Report Share Posted September 7, 2016 Hamlins Bidgwater Westside Motors Bridgwater Quote Link to post Share on other sites
marki Posted September 7, 2016 Author Report Share Posted September 7, 2016 Thanks as always. Mark. Quote Link to post Share on other sites
monty Posted September 8, 2016 Report Share Posted September 8, 2016 Up the M4 to Bassett Down Balancing near Membury. Quote Link to post Share on other sites
Nick Jones Posted September 8, 2016 Report Share Posted September 8, 2016 Westside definitely can do balancing as he's done stuff for me before. Hamlins I'm not so sure. I doubt it is necessary as the small diameter means it would have to be a very long way out to cause any problems. Also, being a harmonic damper rather than a straight pulley I'm not sure if it is even possible. Nick Quote Link to post Share on other sites
TriumphV8 Posted September 8, 2016 Report Share Posted September 8, 2016 I simply made my own balancing machine. Felt unsafe with just refitting the unbalanced pulley Quote Link to post Share on other sites
marki Posted September 9, 2016 Author Report Share Posted September 9, 2016 Hi All. Well that turned out harder than I expected. It turns out that most places will only balance the pulley wheel if it can be attached to the crank. After a lot of calls I've found universal balancing in Bristol. Thanks anyway, Mark. Hi Andreas. I've no idea how your balancing machine works but am still impressed. Quote Link to post Share on other sites
Guest ntc Posted September 9, 2016 Report Share Posted September 9, 2016 Mark I presume the rest is already balanced? Quote Link to post Share on other sites
marki Posted September 9, 2016 Author Report Share Posted September 9, 2016 Yep. Quote Link to post Share on other sites
TriumphV8 Posted September 10, 2016 Report Share Posted September 10, 2016 Hi Andreas. I've no idea how your balancing machine works but am still impressed. Its made according to Ludwig Apfelbeck "Wege zum Hochleistungsviertaktmotor" and the funny language and the need of a lathe are the biggest stones in the way. The principle is easy and its easy to build. https://www.amazon.de/Wege-zum-Hochleistungs-Viertaktmotor-Liebhaber-Viertakt-Motoren/dp/3879435782 It is simply a shaft through the pulley that can be dropped on the big wheels to reduce friction. The pulley rotates and the heaviest part turns down and can be grinded off a bit. I also balanced the fans and the flywheels with it. Even when I get a balanced flywheel I put it on the balancer -not bad to believe but control is better- and several times I had fans to be quite heavy out of balance although its only made from plastic! Quote Link to post Share on other sites
Lebro Posted September 10, 2016 Report Share Posted September 10, 2016 The link above was not very helpful ! Bob. Quote Link to post Share on other sites
stuart Posted September 10, 2016 Report Share Posted September 10, 2016 The link above was not very helpful ! Bob. Possibly might be if you read technical German! ;) Stuart. Quote Link to post Share on other sites
TriumphV8 Posted September 10, 2016 Report Share Posted September 10, 2016 The link above was not very helpful ! Bob. Why not? You do not like the book? You can not order from GB? It was just a hint to see that book that has and shows all the details and tricks to make a high performance engine at home with the smallest amount of tools and machines. Apfelbeck made some of the fastest engines of his time he is not only a story teller like Des Hamill for example. I like what he did and copied a lot of his hints. It all works perfectly! Quote Link to post Share on other sites
Lebro Posted September 11, 2016 Report Share Posted September 11, 2016 If only I spoke German ! I assume (referring to your photo above) that youhave 4 large disks, 2 each side of the thing to be balanced ? Bob. Quote Link to post Share on other sites
TriumphV8 Posted September 11, 2016 Report Share Posted September 11, 2016 If only I spoke German ! I assume (referring to your photo above) that youhave 4 large disks, 2 each side of the thing to be balanced ? Bob. There are lots of pictures in the book. with a little German its easy to understand what he does The big discs have ball bearings and rotate not fast reducing the forces more. Normally the shaft should lay mainly on one set of discs and the second set should hold the shaft only in position. Was done for me 30 years ago by a machining shop. I think 100 items had been balanced with it. Mostly flywheels had been balanced where about 2 grams can be located. In my opinion enough to make a flywheels that I reduced in weight on a lathe can de made ready for use again. Quote Link to post Share on other sites
Lebro Posted September 12, 2016 Report Share Posted September 12, 2016 (edited) Thanks Andreas, I understand how it works now. I have a lathe, so maybe I will make one one day. Can you show a photo of yours from another angle to see all the disks ? Bob. Edited September 12, 2016 by Lebro Quote Link to post Share on other sites
TriumphV8 Posted September 12, 2016 Report Share Posted September 12, 2016 Only this one at hand Quote Link to post Share on other sites
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