Just wondering if there's a list of all the aftermarket caliper weights somewhere?

I'm trying to reduce some weight on my race car and info is hard to find!

Ones i'm interested in are:

OEM - 4.7kg each

AP CP6637
Spoon - 2.6kg each
Stoptech Trophy 4 pot - 3.7kg each (incl all brackets / bolts)
Stoptech ST40
Wilwood Dynalite 4 pot - 1.46kg each (no hardware)
Wilwood FNSL6R 6 pot - 2.2kg each (no hardware)
Tarox 6 pot 320mm kit B32-6 - 2.2kg each (no hardware)
Tarox 8 pot 330mm kit B33-10 - 2.95kg each (no hardware)



Stoptech Trophy here: https://www.s2ki.com/s2000/topic/834...bbk-installed/
Tarox tech info: http://en.tarox.com/products/racing-brake-calipers.html

 

I have some Stoptech ST40's I can weigh, I'll try this weekend.

 

Excellent thanks

 

Dynalite forged 4 pistons - 3 lb 3.5oz = 1.46 kg (no hardware)

 

The AP CP6637 with S2000 brackets weigh 5.5kg for a pair. The discs with bells are 12.1kg, again for a pair.

I wouldn't necessarily use that AP kit for a race car. The use of 26mm thick discs helps the wheel fitment but makes for expensive discs for example.

The big benefit from changing the front brakes isn't so much weight, but control. Having a good, rigid, opposed piston caliper gives much better modulation control. The heat management helps as well. It's never just a case of fade, you always want to stay in a consistent area of the mu curve so that you have the feel to brake how you want.

-Brian.

 

Yep agree, thanks Brian

I'm actually quite happy / impressed with the OEM calipers and Dixcel race setup, in that they never fade, never crack discs, and lock my A048s up at will.

Really I'm looking to save weight and maintain reliability / performance, soI thought I'd get a full listing of weights to begin with.

Actually like the look of the Wilwood forged dynalite with 32mm discs:

https://www.s2ki.com/s2000/topic/940...gal-brake-kit/

 

Mine weigh 2.2 kgs and they are proven to take abuse on 500HP, 2800lbs cars. Its one thing to loose weight, but can they take a beating. We also have a review on a boosted S2K, no fade!! Reduce rotor weight too.

Total weight savings is 15lbs + unsprung!!

Cheap replacement 2 piece rotors and 20mm pads that last much longer than typical thin S2K pads.

 

Very nice

 

got my Wilwwod dynalite's today.
the scale shows 1.4 kg.
bracket 0.1 kg.
rest of the hardware (bolts, washers, brkae line adapters) are 0.2 kg each side.

 

it's not only about the caliper - but also brake disc: