I have heard of one case of Billies rattling on the Italian Forum
Technical Koni FSD rear shock rattle.. Shock!
- Thread starter The Twins
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Technical Koni FSD rear shock rattle.. Shock!
I have heard of one case of Billies rattling on the Italian Forum
Maxi
you have the spec's, you seem to have the inside knowledge maybe you could do a bit of research and inform us
Maxi
you have the spec's, you seem to have the inside knowledge maybe you could do a bit of research and inform us
Well not really, if someone reminds me on Friday I'll try and pop into GE Tools on the way home as I finish at 1:30 on Fridays.
The place I work for makes the tools as seen in the photo I attached
Loads of different bolts in different sizes and none of them costs us most then 20 or 30p and they're not cheap, they're made to withstand the stresses of being mounted on a robot (the one in the photo is actually a pedestal tool that is fixed) and making cars for the life of however long the model of car is made. None of the bolts is specially commissioned or anything crazy, we just order them in and usually it only takes a day or two at most!Attachments
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Checked the top and bottom mountings of my Bilstein dampers today whilst changing the wheels over for the winter steelies. Gave them a quick check torque as they've had a few months of bouncing around. As expected, everything is fine, bolts are tight and the dampers show no signs of moving at all.
Didn't really expect they would have, to be honest!
Didn't really expect they would have, to be honest!
OP
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The Twins
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I'm convinced that it's the 'platform damping' valve that rattles. As I mentioned earlier Fox Forks on mountain bikes had the rattle issue. It was commonly blamed on the 'platform damping' valve. Don't know if they still do as I've been riding road bikes for the last couple of years.
Only one of mine is rattling btw.
Only one of mine is rattling btw.
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Damping on cars is a little more complicated usually, but I'm sure I remember Koni admitting it was hydraulic knock. Isolation of these sorts of noises is always hard when the space to work is so limited - the physical size of these dampers isn't exactly large..
The Twins - I won't say I told you so. But I told you so. Should have waited and bought the B14 kit!
I can comment that the ride on the B14s is sublime on the 14" wheels I have on at the moment - so the 15" ones are no doubt a happy compromise as Daniel alluded to in his original review of Jason's car. And IIRC, Jason had (has) Toyo tyres on his car, which have a relatively soft sidewall, so in the reasonably high profile you get with 15" wheels, that'd fit.
The Twins - I won't say I told you so. But I told you so. Should have waited and bought the B14 kit!
I can comment that the ride on the B14s is sublime on the 14" wheels I have on at the moment - so the 15" ones are no doubt a happy compromise as Daniel alluded to in his original review of Jason's car. And IIRC, Jason had (has) Toyo tyres on his car, which have a relatively soft sidewall, so in the reasonably high profile you get with 15" wheels, that'd fit.
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OP
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The Twins
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Yep, you were right, should have got the Billies : /
I have had the 500 running on 16s and 17s just to test the bump effect. Little difference tbh. Now on its 14 steelies for winter and still OK.
Could be tempted to swap to the B14 kit but hoping to trade up to an Abarth next year.
Could be tempted to swap to the B14 kit but hoping to trade up to an Abarth next year.
My 500 feels quite nice on 15's with 86 load rated tyres it must be said.
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Mine's nice on the 16's - it's just *very* firm (which took a little getting used to). Handles like it's on rails though. I have had many a comment from work colleagues trying to keep up around twisty roads.
mine's very firm on 16's and softer but still crap on 14's
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OK,it's been a while so did anyone who's interested find out anything ( apart from the shock revelation that the Mito is based on the Grande Punto ).
Anyone still trying to source bolts? I did quite a lot of looking but could not find the exact size off the shelf.
I did re-read Edi's thread on the Abarth forum and despite some scepticism on here what he says does seem to make sense. He's been through 3 sets of Koni's. He photographed original bolts and the ones he had made up. The difference in the shaft diameter is clearly visible. He photographed the wear on the bushes of the shocks. That has to be caused by movement, nothing else. How audible would a knocking sound be were it to be coming from within the shock. He has no rattles or knocking now.
Anyone still trying to source bolts? I did quite a lot of looking but could not find the exact size off the shelf.
I did re-read Edi's thread on the Abarth forum and despite some scepticism on here what he says does seem to make sense. He's been through 3 sets of Koni's. He photographed original bolts and the ones he had made up. The difference in the shaft diameter is clearly visible. He photographed the wear on the bushes of the shocks. That has to be caused by movement, nothing else. How audible would a knocking sound be were it to be coming from within the shock. He has no rattles or knocking now.
call the number I gave you, they'll probably sell a set to you for less than 10 quid
ahmett
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I cant wait to get myself some billies! I just feel a little stingy spending 800 euros to change suspension in my car when I mainly drive in the city... I'll eventually get round to it! = )
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Called and answer was negative
ah poo
ahmett
Prominent member
I was wondering guys, has lowering the suspension (ride height) changed fuel consumption at all as the car is lower so I guess better aerodynamics?
Thomas Smith Fasteners are the first company to come back to me with a price, here's what they said,
"We should have blanks to enable us to manufacture the above sizes. If the thread diametre are 10 & 12mm, the shank dia generally is slightly thinner (+/- 0.3mm).
To make it cost effective i will offer you alternative on quantities
M10 x 1.25 x 65 Gr 10.9 Hex Bolts - 6 off £10.00 each, 25 off £2.50 or 50 off £1.95 each
M12 x 1.25 x 95 Gr 10.9 Hex Bolts - 6 off £11.00 each, 25 off £2.25 or 44 off £2.00 each
Delivery 7 Days"
So is anybody interested, will the fact that the shanks are 0.3mm too thin affect their ability to reduce the knocking? It would have been nice to order a small quantity at a low price to see if they worked.
"We should have blanks to enable us to manufacture the above sizes. If the thread diametre are 10 & 12mm, the shank dia generally is slightly thinner (+/- 0.3mm).
To make it cost effective i will offer you alternative on quantities
M10 x 1.25 x 65 Gr 10.9 Hex Bolts - 6 off £10.00 each, 25 off £2.50 or 50 off £1.95 each
M12 x 1.25 x 95 Gr 10.9 Hex Bolts - 6 off £11.00 each, 25 off £2.25 or 44 off £2.00 each
Delivery 7 Days"
So is anybody interested, will the fact that the shanks are 0.3mm too thin affect their ability to reduce the knocking? It would have been nice to order a small quantity at a low price to see if they worked.
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I'm waiting to hear back from someone who makes bespoke bolts. He thinks he can help.
I think that to prove or disprove this thing we would not want a tight fitting bolt, although if the bolt is exactly 12mm and the bush is exactly 12mm it's not going to fit and if the thread is too short the bolt will lock up before it tightens ( or need a fatter washer ). It would be handy if someone has a standard Abarth rear shock lying around and could measure the inside diameter of the bush. If it's exactly 12mm as are the Koni's then this theory about the cause of the knocking is flawed.
