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Old 27-01-2011, 12:21 AM   #51
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Originally Posted by Curly View Post
Glad i bought the gayman now
Goes with the bag
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Old 27-01-2011, 04:05 AM   #52
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Quote:
Originally Posted by _Nathan_ View Post
Can you show your calculations please.

Just for you mate

I used stoptech's formula from here:
http://www.stoptech.com/tech_info/fo...g_dynamics.pdf

Torque created by the caliper on the rotor (at the wheel) = TW

TW = PS x AP x μ x 2 x RE

PS = Pressure of system;
AP = Total Area of pistons in one half of caliper (one side of opposed type or active (piston) side of sliding or floater type);
μ (CoF) = Friction Coefficient; x 2, since there are two sides of the rotor that the pads are exerting force against;
RE = Effective Radius of clamping force

RE is expressed as Re = (D+d)/4
where D is disc usable outside diameter and d is disc usable inside diameter. Although Stoptech provided that the effective radius on the M3 can be expressed as ((disc diameter/20)-(AP))

The Brake Bias ratio is simply TW (front)/TW (Rear)

Have fun


And for those really good at Physics, here's a really good page full of formulas:

http://www.engineeringinspiration.co...calcs.html#der

Last edited by NZ_M3; 27-01-2011 at 04:08 AM.
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Old 27-01-2011, 10:06 AM   #53
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My head hurts again Tom - make it stop!
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Old 27-01-2011, 10:14 AM   #54
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Quote:
Originally Posted by NZ_M3 View Post
Just for you mate

I used stoptech's formula from here:
http://www.stoptech.com/tech_info/fo...g_dynamics.pdf

Torque created by the caliper on the rotor (at the wheel) = TW

TW = PS x AP x μ x 2 x RE

PS = Pressure of system;
AP = Total Area of pistons in one half of caliper (one side of opposed type or active (piston) side of sliding or floater type);
μ (CoF) = Friction Coefficient; x 2, since there are two sides of the rotor that the pads are exerting force against;
RE = Effective Radius of clamping force

RE is expressed as Re = (D+d)/4
where D is disc usable outside diameter and d is disc usable inside diameter. Although Stoptech provided that the effective radius on the M3 can be expressed as ((disc diameter/20)-(AP))

The Brake Bias ratio is simply TW (front)/TW (Rear)

Have fun


And for those really good at Physics, here's a really good page full of formulas:

http://www.engineeringinspiration.co...calcs.html#der

+1
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Old 27-01-2011, 10:58 AM   #55
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Quote:
Originally Posted by glendog74 View Post
My head hurts again Tom - make it stop!
I suggest less of this and more of that ...
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Old 27-01-2011, 11:40 PM   #56
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Originally Posted by glendog74 View Post
My head hurts again Tom - make it stop!
Sorry

Quote:
Originally Posted by lawsy View Post
I appreciate your input Tom, but math aside, when I fitted the Alcons, driving the same track, same weather, same wheels/tyres,same suspension.

It affected the balance of the car under extreme braking, not alarmingly so, but enough for me to notice, and enough to see drops in corner entry/mid corner/corner exit speeds, which also slowed down my straight line speed.

The alcon kit is very very good, but just makes the car feel unbalanced at 100% attack.

I am also not the only person to notice this.

The "issue" obviously has not bothered me at all as I now have Alcon fitted on my Evo X.
Shane I get what you are saying exactly. When I run different brake pad compounds in my car I notice a shift in brake balance. I can imagine what it must be like with the rear kit also in place.

Perhaps time we all invest in a brake bias adjuster

Last edited by NZ_M3; 27-01-2011 at 11:44 PM.
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Old 27-01-2011, 11:56 PM   #57
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I have just bought this pedal box.



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Old 27-01-2011, 11:57 PM   #58
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Ps, Ta for the calcs.
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Old 28-01-2011, 12:05 AM   #59
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I have just bought this pedal box.



Nice box Nath
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Old 28-01-2011, 12:06 AM   #60
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I have just bought this pedal box.




i can imagine you sitting there watch telly with your feet resting on it
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