mx5cartalk.com

I have recently come into contact with someone who works for AP Racing in the UK. I have the opportunity to get a big brake kit at a discounted rate.

http://www.apracing.com/info/products.a ... _1669_1050

this is probably a more useful link for what is in it

http://www.apracing.com/info/index.asp? ... ke+Kits_30

My question is will this be worth the money - it will come in at less then the goodwin 4 wheel kit. I am thinking of getting a daily driver next year and make my car into more of a drive to track/moutain driver only.

Two things you want to consider in racing is the class you want to race in and how much your willing to pay for tyres. Big rims are needed to clear those calipers. Additionally most supersprint style classes stipulate you can only upgrade brakes to that an upgraded same model car. So you go into the real race-car league. Plus of course without the power to really need it...expect to just be using street pads. A big rotor/caliper setup makes it much harder to get heat into the brakes and keep it there.

My reference would be the hello kitty silvia at circuit club events. He upgraded an S13 silvia to use R32 front calipers. This is a 140kw ATW N/A CA18DET silvia and he was running 1:09's around wakefield...he couldn't use a race-pad anymore with the R32 front brakes. He went back to DS2500's.

If I read correctly they require a minimum of 16\" rims to clear the caliper, and a 276mm x 34mm disc? That isn't really that extreme is it?

NB8B's onward come with a 16\" rim anyway, you might struggle with the factory offset though to clear the calipers?

I used to run R32 GT-R caliper/discs on my old SR20DET 180sx combined with AP Racing pads and fluid, that ran just over 170kw @ the rears and couldn't fade them, they were also perfect for street/twisty runs as well as the track.

16Bit - How much landed for the MX-5 4-piston front brake kit? I take it it is a bolt-on?

Pixola has AP 4 pots under his factory 15\" wheels

If the price is right i'd consider getting these and upgrading my wheels at the same time.

Group buy??

I'd love to get theses as well but can't imagine them being cheap. Your looking at the best part of $10k to do an AP break upgrade on something like a skyline. I wonder if they're bolt on or need some work?

Okibi wrote:Pixola has AP 4 pots under his factory 15" wheels

If the price is right i'd consider getting these and upgrading my wheels at the same time.

Group buy??

if they fit under my stock NB8A rims and the price is right then I'll also be interested

Nahh the site says under 16\" wheels, pixola's APs were custom built.

you guys suck
Just when I am all set to upgrade the car to make it go faster, you tempt me with things to make it go slower.

I'm being argumentative, but the \"part number\" is a bit underwhelming.
\"...1985 to 2006\"

Flyin' Miata makes a set at a fair price. Willwoods.

like I said the kit will come in at less then the willwood 4 wheel kit.

the reason I am not getting the willwood based kit is I have heard the callipers are shite and flex. This is from people who have used them - not a guy who reads the catalogues or internets.

I will have to get some 16's but thats not too much of a big deal. I will probably end up getting the work cr kai ones .

Its a bolt on kit. I should hopefully have an answer on how much it will be soon.

So many questions. APs are good gear, but really, they are wasted on a road car. I am looking at upgrading to the 4pots they stick on the lotus exige for the race car this year, but because the wilwoods flex that much that my pads taper. Apart from that, the wilwoods have actually survived pretty well on the racer (running 550deg temps and hawk dtc60 pads) and would be fine on a road car - no problems. The best upgrade is the larger rotors and unless you are going to up the size from the NB270mm to something more substantial like a 295x26mm rotor, I wouldn't bother. The bigger rotor increases the effeciency in both heat and torque which is why you improve your brakes in the first place.

what about this kit then

http://tinyurl.com/3a6vne - edit Okibi fixed stupidly long url -

its got 313mm rotors - would i need 16's or 17's?

17s at a guess, I need 16s with 295mm rotors.

The question I have is why do you need bigger brakes.

I have 1.8Lt brakes and have done heaps of mountain runs and havent seen a spot of fade yet. I dont believe the pads are anything special as they were replaced by the dealer before I bought the car.

Bigger brakes=shorter stopping distance=brake later=faster lap times (in theory)
Not really an issue for a street car.
I've got the standard brakes on my 1.6 and have never had fade at the track but still think theres room for improvement.

Brakes are only as good as the friction between the tyre and the road!

In other words...don't forget about your tyre performance....no point having brakes that have the capacity to put you through the windscreen by just breathing on them, if all you wind up doing is locking them up everytime.

Cheers,
Danny