Matching rear calper to a front 'S'.

[bkreigsr]

Anyone know of a rear caliper that would pair well with front 'S' calipers.

Must be alloy.
Bust be direct bolt-in to the 3" rear spacing. (no adapters)
Must fit inside 14" Fuchs.

PMB has a Brembo on it's website that fits the criteria, but I'm not sure whether their 48MM pistons would complement, or detract, from the S performance in regards to the resulting bias.

Any thoughts?

Thanks
Bill K

[Trackrash]

48 mm is the size of the pistons in the front S calipers, so your bias will be way off.

[Bill Verburg]

Originally Posted by bkreigsr

Anyone know of a rear caliper that would pair well with front 'S' calipers.

Must be alloy.
Bust be direct bolt-in to the 3" rear spacing. (no adapters)
Must fit inside 14" Fuchs.

PMB has a Brembo on it's website that fits the criteria, but I'm not sure whether their 48MM pistons would complement, or detract, from the S performance in regards to the resulting bias.

Any thoughts?

Thanks
Bill K

The PMB Brembo is a front, to balance A or S or Wide A front you want 2x38mm rear pistons, ie stock M rears

[wirihana]

I have these, talk to Eric he may be able source some more?

PMB - LWB Brakes

[bkreigsr]

Thanks guys.

wirihana - I did talk to PBM regarding the LWB calipers, and there are no plans for reinstatement. Story of my life. Let me know if you ever want to sell yours.

Bill V, what master cylinder would you recommend with the S and stock M in the rear?

Thanks again, Bill K

[bkreigsr]

Bill V - what m/c would you recommend for my application (S+M)?
Are you still of the opinion that the 23mm is a leg buster?

Thanks

Bill K

[kent olsen]

I replaced the front "M" calipers on my 72 with "SC" calipers. About a 20% increase in swept area and they bolt on. Still have "M's" in the rear. I do have drilled/slotted disc's. My car only weighs 2100 lbs so that helps and I run 205X50X15 tires.

[Bill Verburg]

Originally Posted by bkreigsr

Bill V - what m/c would you recommend for my application (S+M)?
Are you still of the opinion that the 23mm is a leg buster?

Thanks

Bill K

I do know a few good drivers that use a 23.8mm non boosted m/c on their track cars

Yes, it takes a lot of leg compared to a regular 19mm m/c

I think that there is a 20.6mm m/c from a VW Corrado that may also work for this application, but have never actually used one. This would be a nice compromise size.

For non boosted cars w/ M front, S or either of the A's and M rear a 19 will be the best choice for most drivers most of the time.

For boosted cars it's less clear. The 2 choices are 20.6 or 20.3, both work and the boost takes a lot of the pain out of using the bigger m/c.

The advantage of a bigger m/c is better ability to modulate the brakes and less tendency to lock them. The disadvantage is the extra leg needed.