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NedHan79
Spa-Francorchamps


Joined: 08 Nov 2018
Posts: 363



PostPosted: Tue Mar 12, 2019 9:44 pm    Post subject: Anti roll bar size? Reply with quote

I removed my rear anti roll bar this evening. I need new bushes but I’m a little confused as to what size I need. My cars m030 spec and I think it’s supposed to be 19.8mm according to design 911’s site.
I’ve measured it at 19mm across the bar in various places but only 18mm at the mounting points. My verniers are a bit prehistoric so not that accurate but I’m thinking I’d need 18mm but these aren’t available.
Will 19mm be grand?
Anyone have this issue?
 
  
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infrasilver
Fast & Furious
Fast & Furious


Joined: 04 Oct 2010
Posts: 8133
Location: East Midlands

2001 Porsche 996 Targa

PostPosted: Tue Mar 12, 2019 10:09 pm    Post subject: Reply with quote

If your caliper is a little out, use an adjustable spanner to tighten down on the ARB and measure the distance with a tape measure once it's removed from the ARB.
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NedHan79
Spa-Francorchamps


Joined: 08 Nov 2018
Posts: 363



PostPosted: Tue Mar 12, 2019 10:17 pm    Post subject: Reply with quote

A handy tip infrasilver. I can’t see it being that far away though. I’ll take the arb with me to work tomorrow. I’ve another set of calipers there, though they’re still analog. I’m going to have a go at making the ends of the bar adjustable. I like the idea of it being a little tighter to help dial out understeer.
 
  
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Gooey36
Trainee


Joined: 23 Aug 2017
Posts: 97



PostPosted: Thu Mar 14, 2019 12:17 pm    Post subject: Reply with quote

When I originally replaced my bushes for power flex ones the original bar had worn in the bush region, I had to measure using callipers/adjustable and order a size appropriate to the worn bar.

If the bush is too big for the bar, I guess that would reduce its effectiveness?
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Daily: 2016 Audi A4 Avant S-Line TDi
 
  
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Gooey36
Trainee


Joined: 23 Aug 2017
Posts: 97



PostPosted: Thu Mar 14, 2019 12:19 pm    Post subject: Reply with quote

NedHan79 wrote:
A handy tip infrasilver. I can’t see it being that far away though. I’ll take the arb with me to work tomorrow. I’ve another set of calipers there, though they’re still analog. I’m going to have a go at making the ends of the bar adjustable. I like the idea of it being a little tighter to help dial out understeer.


Are you just going to drill additional holes in the flattened region? I have a new set of M030 ARB’s waiting to go on so be interested to see how this turns out!
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NedHan79
Spa-Francorchamps


Joined: 08 Nov 2018
Posts: 363



PostPosted: Thu Mar 14, 2019 1:23 pm    Post subject: Reply with quote

Hi gooey. Ive ordered 19mm poly bushes but I think there might be a little bit of play but this is closest I can get. I might have to come up with a different solution for that. It’d be easy enough to put a sleeve over it, weld it and get a bush to suit the bigger size as plenty are available.

As for the bar ends, yes. I have simply flattened the ends. Easy enough as it’s just hollow tube. You need to be careful and get both tends the same, make sure your over all length from the bend is the same distance to the hole. Haven’t got round to drilling it yet but I’m planning on leaving 10mm of a gap between the holes.
I’ve also the lowering springs in so I’ve no idea how this will all pan out but I’m keen to see
 
  
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NedHan79
Spa-Francorchamps


Joined: 08 Nov 2018
Posts: 363



PostPosted: Thu Mar 14, 2019 9:25 pm    Post subject: Reply with quote

So this is where I’ve ended up with the bar ends. 10mm gap as I said. Just waiting on the bushes coming to stick it back in.
 



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