4 pot versus 6 pot calipers

[RACER X #99]

Scottj,
Are those your Cobra brakes or you dirt car brakes?

RD

[scottj]

RD-

Cobra brakes. The Dirt Car uses 4-piston Superlites, same pad, same pistons on all 4 corners.

Scott

[Ant]

jac mac,

I have done some broad research on weights of calipers and a rough comparison between AP Racing and Wilwood calipers

AP Racing 4 pot calipers Caliper Family No. CP3789 2.2kg
Wilwood 4 pot Superlite calipers 4Ib, (billet superlite 3.75Ib)

AP Racing 6 pot Rally calipers Caliper Family No. CP6750 3kg (circuit calipers are around 2.3kg)
Wilwood Superlite 6 pot 5Ib

Having said that these may not have been the lightest AP's, as their lightweight versions maybe lighter than Wilwood, and obviously for the difference in price the AP has to have some benefits over the wilwood!

[Aussie Mike]

The AP 4 piston callipers are about AU$900 each over here. I'm looking at a set for the front of mine. I might have a look at the 6 pot jobbies too and see how much they are.

One advantage the APs have over the Willwoods is that their pistons have dust seals which will reduce the frequency of caliper rebuilds. It's a requirement for rego over here that the calipers have dust seals so the Willwoods are out. AP are also used in a lot of high performance OEM applications like Brembo. This makes me think they must be up to snuff if the factories are choosing them.

Cheers

[Ant]

Aussie Mike,

Hey big brother has to stipulate all the technical criteria for the masses!

Have you a link to a supplier, as that pricing doesnt sound bad for 4 pots, but I reckon 6 pots will be a marked jump up in $$$.

[Aussie Mike]

Hi Ant,

I've been talking to Racebrakes. Here's a link to their web page: Racebrakes

The real sting in the pricing is when you go to get the brackets to bolt the calipers to your uprights. If you can make these yourself you can save a fair bit of money.

Cheers