Question on rear caliper upgrade.
Thread Starter
Senior Member
Joined: Jul 2011
Posts: 426
Likes: 4
From: Sacramento, CA
2005 Granite Gray C55
Question on rear caliper upgrade.
So my friend is offering me a pair of rare Alcon Brabus rear calipers for $300. Definitely a great price and hard to refuse the offer.
I know these will fit on our 300x22 rear rotors, but my biggest concern is the balance in the brake system.
Doing this will lead me to have 4 pot fronts and rears, and I'm hoping that the fronts are bigger still and will contribute to at least 70%+ of the stopping force.
What are your thoughts?
Thanks guys!
I know these will fit on our 300x22 rear rotors, but my biggest concern is the balance in the brake system.
Doing this will lead me to have 4 pot fronts and rears, and I'm hoping that the fronts are bigger still and will contribute to at least 70%+ of the stopping force.
What are your thoughts?
Thanks guys!
Banned
Joined: Feb 2006
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depends on how hard you brake in a traffic situation.
if a dangerous situation occurs you need to hit brakes hard car might spin 360 because of the even brake force.
there's a reason why manufacturers use less pistons in the rear than in front
4/2 - 6/4 etc etc
if a dangerous situation occurs you need to hit brakes hard car might spin 360 because of the even brake force.
there's a reason why manufacturers use less pistons in the rear than in front
4/2 - 6/4 etc etc
Senior Member
Joined: Nov 2010
Posts: 256
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2002 C32 AMG
I agree...
More pistons doesnt mean more braking force, its more evenly distributed... The size of the pistons are the main factor..
Think about it.. If you have a mini 6 pot at front and large 4 pot at rear the 4 pot may have a larger force.
More pistons doesnt mean more braking force, its more evenly distributed... The size of the pistons are the main factor..
Think about it.. If you have a mini 6 pot at front and large 4 pot at rear the 4 pot may have a larger force.
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Junior Member
Joined: Jul 2011
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From: Qc, Canada
2005 C55
2, 4 or 6 pistons are just for a better distribution on the pads, if you check the piston surface between 4 and 6 pistons (example front), they are very close. The biggest differences are the size of the brake pads and the size of the rotor. The power braking between 2 pistons vs 4 pistons are the same. If you want a car to make trail braking, you need more rear brake then stock. Stock brake ratio are conservative.
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Thread Starter
Senior Member
Joined: Jul 2011
Posts: 426
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From: Sacramento, CA
2005 Granite Gray C55
Thanks for the information guys! I'm having my friend take more pictures of the calipers for me sometime today.
Just for clarifications, I am able to run it on my stock setup if I measure the diameters of the pistons? If the pistons on the alcon are bigger than the fronts, I should just avoid it?
Thanks guys!
Just for clarifications, I am able to run it on my stock setup if I measure the diameters of the pistons? If the pistons on the alcon are bigger than the fronts, I should just avoid it?
Thanks guys!
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Joined: Jun 2009
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From: Atlanta Metro
Current: C217 V12TT AMG Previously: C55 AMG, SL65 AMG
You need to calculate the surface area of the stock pistons (which I think are 42mm) and the new one. If you have a significant change in rotor size, that as well.
I'll be honest - you need to do a lot more research about brakes and upgrades and calculations. This isn't something that you do easily, nor just make a bracket and pop them on. You realize that there's many ways to injure (kill) yourself, and more importantly, other people, by doing this if you don't know what you're doing?
I'll be honest - you need to do a lot more research about brakes and upgrades and calculations. This isn't something that you do easily, nor just make a bracket and pop them on. You realize that there's many ways to injure (kill) yourself, and more importantly, other people, by doing this if you don't know what you're doing?
