Brake Discs - Upgrade options?

K30DPC · Post by **K30DPC** » Fri Mar 06, 2015 8:40 am

1337Htune wrote:What do i need to put 300mm discs ?

Discs, calipers and carriers of your choice

1337Htune wrote:I read ATR Calipers (17CL16VN), do i need to change the braket ?

If changing only calipers then the advantage is only you get 2 pot caliper but you will stay with 282 discs. Also you need to install longer pistons or small 5mm IIRC extension rings as discs for ATR and Prelude have different thickness. If you swap it with carriers then like merc said you also need ATR discs. All plug and play.

1337Htune wrote:I know its yes if i want 28th disc but if i want to keep 23mm or 25mm ?

Not really like you have said. Bigger diameter discs need caliper to be set further away so need to change carriers only. But if you wanna change discs for thicker ones then you must go for new calipers and carriers in most cases.

1337Htune wrote:Is the ATR calipers bolt-on on 5G with the correct thickness of disc/braket

Yes buddy. It's plug and play

1337Htune wrote:Can i put 17CL15VN calipers from Legend (38/42mm) on the 28T braket from ATR or other Acura/Honda ?

I have callipers from Legend on my car. They also work, but I had to swap sides otherwise I wouldn't be able to bleed them as bleeder would be on the bottom instead of top of caliper. As you can see pots in calipers are different size. Some people says smaller should be first if you looking on spinning discs otherwise it will result on uneven pads wear. So far I didn't noticed this. It is also plug and play mod.

I've heard about Civic R calipers which takes 300mm discs as well and somebody here is using them on IIRC his 4gen just because of 4 stud pattern discs. You can also go for spoon, brembo nd other known brands but this may require some custom work.

My recommendation when upgrading brakes is
- change your brake fluid for somethig good ( I'm running RBF600 but there are other),
- use braided lines,
- do good service for your existing calipers with a lot of attention to rears,
- good pads
and you should be happy for daily use.
Also remember that brake bias is set to front so if you will upgrade fronts only then it will be moved even more to front. Without upgrading rear brakes this mod doesn't make sense for me. When we were on Nurburgring after small bashing on local roads my fronts get so hot so it was smoking from both arches when we stopped. It never happened again after I started running 290mm discs on rear axle

Post by **Merlin** » Fri Mar 06, 2015 9:36 am

K30DPC wrote: My recommendation when upgrading brakes is
- change your brake fluid for somethig good ( I'm running RBF600 but there are other),
- use braided lines,
- do good service for your existing calipers with a lot of attention to rears,
- good pads
and you should be happy for daily use.

Yup, the standard set-up with better components is deffo good enough. But the twin pot 300mm set-up does feel very good

K30DPC wrote: Also remember that brake bias is set to front so if you will upgrade fronts only then it will be moved even more to front. Without upgrading rear brakes this mod doesn't make sense for me. When we were on Nurburgring after small bashing on local roads my fronts get so hot so it was smoking from both arches when we stopped. It never happened again after I started running 290mm discs on rear axle

The ATR has the same rear brakes as the Prelude so upgrading to the ATR front brakes will not throw out balance. In fact on my 4th gen I use KSport 8 pot calipers with 330 x 32mm discs and standard rear brakes with no balance issues.

K30DPC · Post by **K30DPC** » Fri Mar 06, 2015 4:02 pm

Merlin wrote:The ATR has the same rear brakes as the Prelude so upgrading to the ATR front brakes will not throw out balance. In fact on my 4th gen I use KSport 8 pot calipers with 330 x 32mm discs and standard rear brakes with no balance issues.

I'm sure you know it's not only a piston size which is deciding about propper brakes balance

Post by **Merlin** » Fri Mar 06, 2015 4:13 pm

Of course

My point was that even with monster front brakes and stock rear brakes (and no bias valve) good brake balance can still be maintained. I have recently put ATR twin pots with the 300 x 28mm discs on the front of my 5th gen and the brake balance is as good as ever.

It is my opinion that it is upgrades to the rear brake calipers and discs that causes brake balance issues and the need for a bias valve.

mercutio · Post by **mercutio** » Fri Mar 06, 2015 5:44 pm

braking systems have an inbuilt bias already so any upgrade front or rear will affect the bias so to keep the car balanced you would need to think about both ends or if your fitting just atr fronts maybe using the atr master cylinder?

Post by **Merlin** » Fri Mar 06, 2015 9:02 pm

Yes the balance will be out if the new front brakes have a fluid capacity much greater than the OEM ones. If the ATR twin pots have greater fluid capacity it wont be by much, I'd bet they are the same http://www.ludegeneration.co.uk/honda-p ... -t801.html

1337Htune · Post by **1337Htune** » Tue Mar 17, 2015 8:29 pm

So on my stock VTI brake, if i put

ATR carrier + VTI Calipers + ATR Disc + VTI pads = fitting ok for 300mm and 28mm th ?

Post by **Merlin** » Wed Mar 18, 2015 8:59 am

Yes that will work. Mudgey was running that set up. ATR and Prelude pads are the same.

1337Htune · Post by **1337Htune** » Wed Mar 18, 2015 11:29 pm

Merlin wrote:Yes that will work. Mudgey was running that set up. ATR and Prelude pads are the same.

Thanks its perfect !

Do you thinks the ATR carrier can be found on other cars than ATR ?

Like Accord Coupe V6 or other.

mercutio · Post by **mercutio** » Thu Mar 19, 2015 5:27 pm

later model accords run 300mm discs but i am not sure if the carriers will fit worth a try though i suppose