Replacing rear rotors and review of Remsa brake pads

[Ron Burgundy]

A small amount of disc runout will not cause brake pulsation. Calipers have slide pins designed to cope with this sort of lateral movement.
Two things cause runout (that come to mind) - thickness variation and pad material deposits.

Your pulsation was likely caused by brake pad deposits on the new disc. If new brake components aren't bedded in properly there's a risk that a very thin layer of brake pad material sticks to the disc surface, causing a grabbing or sticking feeling like pulsation. Google it.

Good quality brake component materials are supposedly matched to minimise any chance of this happening (OEMs go to great lengths to ensure this). Mixing and matching brands and materials is where I've seen this most.

If there is an amount of runout outside of acceptable spec, at its highest point the pads will build deposit. This will then result in pulsation...

 

[Smitty]

A small amount of disc runout will not cause brake pulsation. Calipers have slide pins designed to cope with this sort of lateral movement.
...................

that is NOT the case with 'large' racing style calipers.. eg BREMBO
or AP RACING (as used by HSV) . Monoblock style calipers also
do not have slides

In these cases, small variations in the run out of the wheel hub can caused
pedal pulsations or stg wheel shake during braking.

The AP RACING front calipers on my HSV are sensitive to disc rotor runout
(as I have found from experience, hence my comments on 'indexing' )

 

[mechanic]

Opposing piston-type calipers deal with a small runout by transferring fluid from one side to the other as the pistons follow the disc runout. One piston moves out slightly while the other piston retracts. Fluid transfers from one side to the other, but there is no net fluid displacement back up the brake hose so no pulsation felt.

You would be shocked if you could measure the runout of a disc under the extreme heat of operation. All discs have a small amount of runout. Each braking system is designed to cope with it.

 

[Ron Burgundy]

Opposing piston-type calipers deal with a small runout by transferring fluid from one side to the other as the pistons follow the disc runout. One piston moves out slightly while the other piston retracts. Fluid transfers from one side to the other, but there is no net fluid displacement back up the brake hose so no pulsation felt.

You would be shocked if you could measure the runout of a disc under the extreme heat of operation. All discs have a small amount of runout. Each braking system is designed to cope with it.

To be diligent i thought i might check runout but I replaced rotors in the past on different cars and never had an issue.
I have a day off tomorrow so I will throw them on. Aiming to do front and back...
Going with DBA 4000 T3 and Remsa pads...

 

[Ron Burgundy]

.......

 

[Skylarking]

Whats the verdict @Ron Burgundy

 

[Ron Burgundy]

Whats the verdict @Ron Burgundy

Messy bruz

They are on...

Gotta jump in the shower and then bed them in...

 

[Mavericks Choice]

Who is your supplier for the Remsa pads?

 

[Ron Burgundy]

Who is your supplier for the Remsa pads?

Brakes Direct.
I had them before and I was happy (except for dust)

 

[Ron Burgundy]

They feel about the same as stock which is good as stock brakes were quite good to start with. No vibration, noise etc.
Pedal feel is great.
I think that only after about 500km when they properly bed in I will be able to tell if there is any difference...
All up it was around $1000 for parts...

If Holden supplied and fitted new brakes all around it would be probably at least double...