Lightweight brake rotors

[phanker]

Looking to replace the brake rotors soon on my 2013 S4.
Considering lightweight 2-piece for some weight savings but a bit shocked at their high prices.

Can you feel much of a difference with the weight saving?

I noticed a huge difference going to lighter wheels/tires which shaved off 7 lbs per wheel. But these lbs are more much more noticeable due to them being further from the hub. The rotors weight saving is closer to the hub.

I prefer just a plain 2-piece set also, no slots or drilled. Is the Apikol our only option?

http://www.apikol.com/index.php/apik...-s4-s5-q5.html

Thanks guys.

[mavz]

I have JHM's 2 piece which are slotted. I don't planning on taking my car to a track/autocross but in daily or spirited driving, I can't tell a difference.

[kcobourn]

I've got ECS Tuning slotted / drilled rotors on front & back. Bought to reduce unsprung weight as an alternative to new wheels (I like the OEM rotors). Can't really say if there's a difference.

[cspcrx]

Have the ECS as well. Cant say that I feel a difference but its only 14lbs so the HP gain would be pretty small. I sure like the way the look though.

[waxxonMTL]

girodisc also make a set of 2 piece plain... look really similar to the apikol.. wouldn't be suprise if one company resell the other stuff lol

[LaCross]

I have the ECS rotors. Can you feel it? Yes

Is it worth the price? No

[RLB6]

For the price of the apikols, you might as well get the ECS wave rotors that are even lighter (6+ lbs lighter than OEM) and looks more race inspired. https://www.ecstuning.com/News/Audi_...015/ES2681113/

[bayonet14]

Have the ECS waved / drilled slotted / only in the front - they do weight less so less rolling mass over OEM - can i feel it....lol...NO

[Zaxon55]

The ECS rotors are awesome, but there is really not a huge reason to go to them over stock if you are not going to be doing aggressive driving at a track.
If you are going to do the rotors for looks then sure, but for weight savings, not worth the $$.
I would say hold on the rotors till you are ready to do an upgraded BBK. The change in Calipers is VERY worth it on this car, as the stock ones are straight up bad.

[acsgp]

Changed my front calipers to the 4 pot forged Brembos from the Q5 3.0T which are far lighter than stock. Have ordered the 2 piece JHM rotors front and back, which will shave off even more weight.

But I do agree that the best way to reduce unsprung weight is to go for forged wheels. So when I swap the stock rims for the forged MTM Bimotos, the difference was very clear.

[LaCross]

forged wheels are a waste of money too... The wheels i got from tirerack arent forged and theyre only 20lbs each. Going forged will cost 3-4x as much and only save maybe an extra pound or two

[yjypm]

forged wheels are a waste of money too... The wheels i got from tirerack arent forged and theyre only 20lbs each. Going forged will cost 3-4x as much and only save maybe an extra pound or two

I really don't see the point of premium forged rims or even 2 piece or 3 piece wheels.
If I were to get a set of forged wheels that cost $6000 I would save the money and go for ese carbon fiber rims for $8000

[acsgp]

We're going off topic - but on forged wheels, you get the strength as well as the weight reduction. Heard of light, cast rims bending fairly easily, even from reputable brands.

[mr shickadance]

We're going off topic - but on forged wheels, you get the strength as well as the weight reduction. Heard of light, cast rims bending fairly easily, even from reputable brands.

thing is, if you hit something hard enough to bend/crack a cast wheel, there is a solid chance you are going to either bend/crack a forged, or do some damage to your suspension.

That force of impact doesn't evaporate into nothing, it goes somewhere along your suspension. Something, somewhere on your car is going to absorb it, be it a wheel, or a tie-rod.

if you are going for a track set up, you really can't beat the enkei line of track wheels.

[acsgp]

thing is, if you hit something hard enough to bend/crack a cast wheel, there is a solid chance you are going to either bend/crack a forged, or do some damage to your suspension.

That force of impact doesn't evaporate into nothing, it goes somewhere along your suspension. Something, somewhere on your car is going to absorb it, be it a wheel, or a tie-rod.

if you are going for a track set up, you really can't beat the enkei line of track wheels.

Actually, I've heard stories (though not personal experience) of lightweight cast rims bending too easily, even on fairly low impact. But to each his own. I would put my faith in forged monoblocks from reputable manufacturers. Rays Volk rims have a tremendous reputation, and was going to put a set on my 964.

[BLACKS4-10]

Going off track here..I have both the ECS 2 piece lightweight floating rotors front and back and difference was marginal at best I felt...I did it for looks and that the OEM rotors especially fronts(SQUEALING) SUCKED!..getting them on sale is nice too

[MrFunk]

Going off track here..I have both the ECS 2 piece lightweight floating rotors front and back and difference was marginal at best I felt...I did it for looks and that the OEM rotors especially fronts(SQUEALING) SUCKED!..getting them on sale is nice too

It's not going to be day and night in an already heavy car like the S4, but I think it's noticeable, especially if you can do all 4 corners - reducing weight (especially rotational mass) is always good to do if you have the opportunity to do so.