What is the benifit of 2 piece rotors over the solid 1 piece rotor?

 

From what I understand, mainly lighter weight as the hat is usually thinner than a cast piece. I can't justify the cost for myself though, as they will be higher than a stock one piece part.

Ed

 

Decreased rotating mass, better heat transfer, and (as a convenience) you don't have to mess with the bearings at every rotor change.

 

And....the look kool as FCKU!

Tommy

 

 

All the 2 piece rotors I have seen are for LS1, C5, and C4 setups. I don't think they make them for crappy stock 3rd gen brakes. So you wouldn't have to mess with the bearing either way.

 

Two piece rotors are wire tied together after bolting. Not something you take apart for turning your rotors- besides, the entire hat/hub assembly is needed to turn them (not just the rotor of a 2pc hat/hub & rotor assembly). So for the average street car that runs these, you will still have to repack the wheel bearings at normal intervals.

The are lighter weight ususally with an aluminium hat and iron rotor. And it does disapate heat much better.

Two pc rotors also have a large variety of options as for straight or curved vanes, how many vanes, and even the option to switch to wider rotors if called for(via caliper pad shims, or switching to wider calipers) based on track conditions. You want to run the lightest weight combo that works adequate for the days function.

Oh yes, Cost is much less for replacement because you only have to replace the rotor (not the hat or the hub based on style).

 

If the hubs are needed to turn the rotors, how do you expect people to turn your rear rotors ? gonna take your axle out and wheel it to them ?

 

Read it again and you will see that I stated hubs/hats (Which means whether you have "hat stlye" or you have "hub stlye")
Of course if you have hats then you don't need the hubs. Do you understand what is meant by hub style? If not I will get a picture for you.

Edit: I understand what you are refering to- But when you have a front "hatstyle" 2pc rotor you still need a Hub. I am not refering to taking a hat and hub when it comes to that "hatstyle" 2pc rotor.

In other words:
Front "hat style"- you have a hat, rotor and hub. You would turn the hat and rotor assembly only-no need for hub.

Front "hub style"- The hub IS the hat in one unit. The 2pc rotor bolts directly to the hub. Meaning hub is piece #1, and the rotor is piece #2

 

You stated that for an average road car you'd still have to repack the bearings when taking them off, which you wouldnt, its just the same as anything else with a 2 piece setup after installing them on the fronts of our cars.

 

If its a hub style 2pc setup- then yes you will have to repack the wheel bearings. Even on a hat stlye where you technically don't have to pull the hub, you should still repack them at the time you do the brakes- thats standard practice maintinance.

 

Z28*****, this is hub style. http://www.wilwood.com/products/kits.../hdfbk_big.jpg

 

Thanks for that info that helps a lot. What does a hat style look like though?

 

I understand the advantages of the two piece rotors, but what are the disadvantages other than the initial cost?

I'm currently looking into brake upgrades and have spoke to the various people offering the different kits. At the moment, Ed's(ebmiller88) kits are looking the best value and the most likely for purchase. However, I'm tempted by the Spohn Wilwood set-up which is made by Dan (Alloy). However, this would need to be a two-piece set-up to get it under the GTA wheels. And would add even more money to the cost of an already expensive kit. What do you guys think I should do?

 

Hat style; http://www.wilwood.com/products/kits/c5bbk/c5f_big.jpg

They mount onto a hub like this- (or like the Spohn bigbrake kit, But that has 1pc rotors.

DrG, Its your call- its all how much you want to spend and how much you feel yoou need the extra options based on where you drive(aka how hard you heat them)

 

The purpose of a separate rotor hat is:
the same rotor (or group of rotors) , with a cetain 'hat hole pattern', will fit lots of hats, the 'lots of rotor hats' will
fit lots of different cars.
Lots of combinations.

 

I'm just chuckling to myself thinking " if only I could interchange things on my own cars" that would be nice. Problem I have is one of my other passions right nowis my '67mini Cooper- Its rims (10"x6"s) are smaller than the brake rotors on my Camaro. The rotors are 7.5" This car is a blast.