Kimjon Posted October 23, 2019 Share Posted October 23, 2019 I'm hoping for it to be this easy? Is it just a simple lever arm ratio? Quote Link to comment Share on other sites More sharing options...
Kimjon Posted October 23, 2019 Author Share Posted October 23, 2019 What I'm trying to explain in above, is 45mm of movement at the bump stop, equals 80mm of wheel travel at the outer edge. So if I have an 80mm gap at the bump stop point, before bump stop contacts, then 80-45mm=35mm packer required. May as well make it 50mm to allow for squish of rubber? Quote Link to comment Share on other sites More sharing options...
Beaver Posted October 23, 2019 Share Posted October 23, 2019 45mm is correct for movement at bumpstop position if you have 80mm at wheel. (I used triangles because triangles are magic) 3 Quote Link to comment Share on other sites More sharing options...
cletus Posted October 23, 2019 Share Posted October 23, 2019 Are you trying to stop the tyre rubbing the inner guard? Quote Link to comment Share on other sites More sharing options...
Kimjon Posted October 23, 2019 Author Share Posted October 23, 2019 59 minutes ago, cletus said: Are you trying to stop the tyre rubbing the inner guard? Yes. It takes a big hit to make it happen, but it can. Quote Link to comment Share on other sites More sharing options...
JoKer Posted October 23, 2019 Share Posted October 23, 2019 could draw it to scale & measure 1 Quote Link to comment Share on other sites More sharing options...
Kimjon Posted October 23, 2019 Author Share Posted October 23, 2019 I think I've got it right after looking at this morning after a good nights sleep. I was super tired = brain stopped working... The impala has 2" drop spindles, hence the reason it's having issues. Plus wider tyres aren't helping either. I'm not sure on the amount of squish I should allow on the stop itself? This is what they look like. About 50mm high by 25mm wide (I'm guessing those numbers, but will be very close). How much do you think these are likely to deform by? Mathematically I need 35mm packers under the stops to make contact before the wheel hits the guard. But that doesn't allow for squishing of the stop. Heavy walled SHS comes in 25mmx25mm, so I'm thinking of stitch welding two bits of this together, one on top of the other. This would make a very strong spacer at 25mm x 50mm with a double gusset in the middle to strengthen it up. At 50mm, it would allow up to 15mm of squish which sounds about right to me? Thoughts???? Quote Link to comment Share on other sites More sharing options...
Nominal Posted October 23, 2019 Share Posted October 23, 2019 5 minutes ago, Kimjon said: I think I've got it right after looking at this morning after a good nights sleep. I was super tired = brain stopped working... The impala has 2" drop spindles, hence the reason it's having issues. Plus wider tyres aren't helping either. I'm not sure on the amount of squish I should allow on the stop itself? This is what they look like. About 50mm high by 25mm wide (I'm guessing those numbers, but will be very close). How much do you think these are likely to deform by? Mathematically I need 35mm packers under the stops to make contact before the wheel hits the guard. But that doesn't allow for squishing of the stop. Heavy walled SHS comes in 25mmx25mm, so I'm thinking of stitch welding two bits of this together, one on top of the other. This would make a very strong spacer at 25mm x 50mm with a double gusset in the middle to strengthen it up. At 50mm, it would allow up to 15mm of squish which sounds about right to me? Thoughts???? Seems like it will be close, and you can always add a few more mm with some flat bar if needed. If this is mainly about bump travel on full lock, I would expect that doesn't happen when travelling at speed. Hitting the bump stops on a dip on the desert rd at 100kmh (for example) will load them up a lot more and they will likely deform further. 1 Quote Link to comment Share on other sites More sharing options...
Kimjon Posted October 24, 2019 Author Share Posted October 24, 2019 Terrible photo, but you get the idea. The bump stop is 1" (25.4mm) wide, so some heavy walled SHS at 25mm x 25mm was doubled up and stitch welded together to give me a very strong 25mm x 50mm spacer block to fit under it. I've drilled corresponding holes right through to match the bump stops and it should just bolt right in. I may upgrade the bolts to the next size up...ummm just because. Quote Link to comment Share on other sites More sharing options...
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