not sure what you mean here? piston area is piston area. pad area has nothing to do with clamping force. pad mu * clamp force * effective rotor diameter = brake torque. pad area plays no role whatsoever in that calculation.
hydraulic pressure acts on the pistons, not the pads. i'm guessing we're thinking the same thing, but wanted to be clear on it..
Actually, its rotor radius roughly at the pad center. Technically it should be the centroid of the pad /w respects to the center or rotation assuming the pad has even pressure at all points, but Pad center probably works
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As Polarmoment noted, it's the centerline of the caliper's pistons that determine the lever arm, the pad is completely irrelevant. The centre of the caliper's piston is the centre of pressure, regardless of where the friction material is located, and that's what the effective diameter is cased on. Pads are not always centered on the pistons, so to use that as the reference opens one up to considerable inaccuracy.
The reason behind increasing the number of pistons but retaining the same piston area is to increase the effective diameter without increasing the rotor OD - the centerline of the piston is moved closer to the rotor OD, so one gets bigger brakes without fitting bigger brakes.
Pad size and area are not relevant, all those dimensions control are the speed a pad heats up and cools down, and how quickly it wears - only the pad material's cf has any effect on braking, the size and area do not.
Charles
Quote:
Originally Posted by Dallas J
Actually, its rotor radius roughly at the pad center. Technically it should be the centroid of the pad /w respects to the center or rotation assuming the pad has even pressure at all points, but Pad center probably works
I suggest not completing the swap as described on dsmtalk, the cobra rotors are 1.10 inch thick and the cts-v/camaro ss caliper is designed to be used with a 1.26 inch thick rotor. Doubling the brake pads is a very bad idea.
We have known that the calipers bolt up, what isn't known is the correction of offset needed with the proper thickness rotors.
Sweet. Now what size are EVO 8 rotors? We know they have the same bolt pattern and more than likely the same hub centric. If they're 13" rotors like the cobra's why wouldn't they work as described on DSMtalk?
Also, in that thread it looks as part he shaved off on the mounting point was on the inside portion (between the hub and caliper) so that the caliper would not stick out as far and should bring the positioning of it in closer to the hub. Then he had to put the extra pad in to make up for that difference he shaved off. If he would have just left it alone and not shaved off the mounting point he probably wouldn't have had to double up the pad on the inside section. He may have then had to either get a wheel spacer to throw the wheels out further or get a different offset wheel.
Correct me if I'm not seeing things correctly.
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Kletke - 16g @ 27psi on Meth
The 14 inch rotor described above from the 370z or g37 will work perfectly. Im not sure why people are battling this. Also cheaper than any other option at 100 a piece.
James
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:91 Talon TSi AWD HX40
The 14 inch rotor described above from the 370z or g37 will work perfectly. Im not sure why people are battling this. Also cheaper than any other option at 100 a piece.
James
I'm not sure but it seems that the 13" rotors he put on his vehicle are correct in diameter, not the 14's unless a bracket is made. They way I see it. The CTS-V's caliper is bolted further away from the center of the knuckle on the caddy so it allows the 14" rotor to be bolted up. It seems are dsm knuckles bolt the CTS-V caliper closer the center of the knuckle so we need the smaller 13" rotor not the 14".
You dont think this will work. The opaque one on top is what a 14inch rotor would look like.
And if you refer to the skematic of the caliper from brembo, the top right shows the angle at which the rotor comes in at. If you look closely, my 14inch ghost rotor matches up perfectly with how brembo intended.
James
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:91 Talon TSi AWD HX40
Hmm that does look close. I guess the only way to find out is to try. Good work with the overlay it does make 1" look pretty minuscule, in my mind it seemed larger, hopefully that picture proves correct.
Hmm that does look close. I guess the only way to find out is too try. Good work with the overlay it does make 1" look pretty minuscule, in my mind it seemed larger, hopefully that picture proves correct.
An inch does seem kinda alot esp when dealing with fine measurements. But its only a half inch more into the caliper. So, i think my picture proves the point though.
James
Quote:
Originally Posted by kmv
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If that doesn't work we still got the genesis coupe brembo at 13.4" or evo X 13.8" . both rotors has our bolt pattern.
Very true. The IX would be the choice though, just becuase the more effective area. If the 14 inch doesnt work, it will be VERY VERY close. Plus these are going to be the cheapest out of any of the rotors. Under 200 for the front!
James
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:91 Talon TSi AWD HX40
Very true. The IX would be the choice though, just becuase the more effective area. If the 14 inch doesnt work, it will be VERY VERY close. Plus these are going to be the cheapest out of any of the rotors. Under 200 for the front!
James
actually the hyundai will be the cheapest they're about $90 a piece.
Yes, I'm on 17" rims. I have MB battles with a 38 offset, the spokes bend outwards so I think they will be more acomidating to the caliper than others types.
I've doing some math and the CTS-V calipers sit approx .5" out further than Evo calipers when mounted up. Its gonna be sooo close.
What are you guys going to do for master cylinders?
Right now I have Baer track front brakes and I am in the process of installing my rear Evo Brembo calipers. I think I will probably leave it like that and not install my front Evo Brembos until I figure out what may need done with the master cylinder.
I believe having that much more fluid volume to move at the calipers is going to make the pedal feel terrible on the stock master cylinder.
No, but when reading the threads about Evo brake upgrades some complain about the mushy feel and how it's "just ok" on the street, but on track it might suck. It also depends on what master cylinder is in the car. On 2Gs at least, the non abs cars have smaller master cylinders. The abs car have a slightly larger MC, but still smaller than that of an Evo.
I believe Drew might still be on the stock master cylinder with his Evo brakes. I'd have to go double check his thread, but I think he had a larger one, but never got around to installing it. He would be a good person to ask about this.
