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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > Megan Racing Toe Arms



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      08-14-2019, 09:33 PM   #45
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Quote:
Originally Posted by Angel67 View Post
The Group N are much much harder, and contribute considerable effective spring rate, but they are pricy.

a

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Can you explain what that means?
I get pricey. I bought 4 and no one can press them straight into my oe toe arms
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      08-15-2019, 07:49 AM   #46
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In terms of "hard" , we measured that they would contribute an equivalent of 56 lb/in in equivalent spring rate, versus around 15 for the oe bushings. So around 4 times stiffer. That is also the reason they are very hard to press in. We also had trouble until we figured out the trick. The pic I posted has two Group N pressed in. That was the first one we did so there's a couple of scuffs but now we're good...

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      08-15-2019, 08:14 AM   #47
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To be clear, that's 56 lb/in per bushing, so 112 for the whole arm with 2 bushings in it (vs 30 for oe).

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      08-15-2019, 10:44 AM   #48
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Quote:
Originally Posted by Angel67 View Post
To be clear, that's 56 lb/in per bushing, so 112 for the whole arm with 2 bushings in it (vs 30 for oe).

a

Stay tuned!
And that increases your rear spring rate?
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      08-15-2019, 09:40 PM   #49
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Yup.

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