Rear brake upgrade
Discussion
macdeb said:
Richard 858 said:
Why would you want to increase the rear brake disc?
This, it's overbraked as it is on the rear.The E38 7 Series BMW Brembo calipers and RS Focus 324mm discs on the front certainly work brilliantly, but even with an extra 40KG of steel gas bottles over my rear axle I've never felt the need to upgrade my rear brakes
Sure, a slightly better handbrake would be nice, but I'm confident the overall rear braking performance is more than adequate just as it is.
Yep, everything that's said above.
Brilliant mod/upgrade that in my case requires nothing to be done at the rears and in an extreme situation with me emergency braking and turning
at the same time found the front bias dragged all the weight on the fronts and actually helped balance the car up, after years of the standard brakes I know for sure the rear would have locked in the past and Made it a very challenging thing to control, basically releasing the brake pedal would have been my only option.
That moment secured my love for good brakes and better balance on the edge.
My view would be bed the new fronts in for a good while before deciding to do anything at the rears, at most you might want to match brake compounds, I got lucky with the compounds on mine E 38 front pads and standard Trv pads on the rear seen excellently matched ( fast road use)
In the year I've had my big front brakes I've watched the rear pad/disc wear and it's still considereable, they are still working at the same level but the fronts dragging weight off them just a small amount removes that risk of rear lock up so early.
Finely tuned front brake pressure then adds that level of control and shear stopping power so you can get the fronts to the point of lock up and feather the pedal and stop in half the time.
It's something to do with disc size on the fronts that stops the grabbing effect with heavy braking so you can apply more pressure on the pedal with less chance of instant lock up and with better control.
In turn this just means you are more confident to brake later and for shorter distances to scrub your speed off,,,, so end up back to square one
Brilliant mod/upgrade that in my case requires nothing to be done at the rears and in an extreme situation with me emergency braking and turning
at the same time found the front bias dragged all the weight on the fronts and actually helped balance the car up, after years of the standard brakes I know for sure the rear would have locked in the past and Made it a very challenging thing to control, basically releasing the brake pedal would have been my only option. That moment secured my love for good brakes and better balance on the edge.
My view would be bed the new fronts in for a good while before deciding to do anything at the rears, at most you might want to match brake compounds, I got lucky with the compounds on mine E 38 front pads and standard Trv pads on the rear seen excellently matched ( fast road use)
In the year I've had my big front brakes I've watched the rear pad/disc wear and it's still considereable, they are still working at the same level but the fronts dragging weight off them just a small amount removes that risk of rear lock up so early.
Finely tuned front brake pressure then adds that level of control and shear stopping power so you can get the fronts to the point of lock up and feather the pedal and stop in half the time.
It's something to do with disc size on the fronts that stops the grabbing effect with heavy braking so you can apply more pressure on the pedal with less chance of instant lock up and with better control.
In turn this just means you are more confident to brake later and for shorter distances to scrub your speed off,,,, so end up back to square one
The rears do approx 20/25% of the braking they are vented relatively large discs with IMO enough pad swept area 
unless your doing it for looks or building a race car why? and I know you've already got this brake setup already Daz even those yours is an early car because I gave you the heads up on those cheap brand new calipers etc 
go spend your money on something else
unless your doing it for looks or building a race car why? and I know you've already got this brake setup already Daz even those yours is an early car because I gave you the heads up on those cheap brand new calipers etc go spend your money on something else Edited by Sardonicus on Thursday 23 March 14:34
Sardonicus said:
The rears do approx 20/25% of the braking they are vented relatively large discs with IMO enough pad swept area unless your doing it for looks or building a race car why? and I know you've already got this brake setup already Daz even those yours is an early car because I gave you the heads up on those cheap brand new calipers etc go spend your money on something else
Thanks ,now I`m taking your advice Im going to change the rears with new slotted ones to match the front . unless your doing it for looks or building a race car why? and I know you've already got this brake setup already Daz even those yours is an early car because I gave you the heads up on those cheap brand new calipers etc go spend your money on something else Edited by Sardonicus on Thursday 23 March 14:34
The mechanic did say they are past there best .
What make do I buy with slots ?
cheers.
Andav469 said:
I have the 324mm Brembo calipers/discs on the front and the 300mm disc from Reyland on the rear, I have no problems with any over baking at the rear, the brake balance is fine with my current pads
DS2500 pads on the front and Mintex on the rear
Not surprising seeing as your still using the stock calipers Dave DS2500 pads on the front and Mintex on the rear
Sardonicus said:
Andav469 said:
I have the 324mm Brembo calipers/discs on the front and the 300mm disc from Reyland on the rear, I have no problems with any over baking at the rear, the brake balance is fine with my current pads
DS2500 pads on the front and Mintex on the rear
Not surprising seeing as your still using the stock calipers Dave DS2500 pads on the front and Mintex on the rear
Of course it's all for visuals lol
Piggy backing on this thread from early on last year as I'm close to making some changes on brakes.
I have the AP 6600 4 pot calipers at the front on 300mm grooved discs, no idea what the pads are but they have AP logos on. I may or not replace them when I re-assemble the suspension but if I do I am 99% going for DS2500.
What to do on the rear? Running 27mm standard set up but with grooved discs; pads are not far of being done so need replacing. Should I:
A - standard Brembo/Pagid from ECP or similar
B - look for a DS2500 or similar matching compound
https://www.eurocarparts.com/ecp/c/TVR_Chimaera_4....
I have the AP 6600 4 pot calipers at the front on 300mm grooved discs, no idea what the pads are but they have AP logos on. I may or not replace them when I re-assemble the suspension but if I do I am 99% going for DS2500.
What to do on the rear? Running 27mm standard set up but with grooved discs; pads are not far of being done so need replacing. Should I:
A - standard Brembo/Pagid from ECP or similar
B - look for a DS2500 or similar matching compound
https://www.eurocarparts.com/ecp/c/TVR_Chimaera_4....
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