Hi there. I need your help on a lot of issues...
1. Anybody know the size of the brake rotors for the 2007-> mazda2? (and if you found someone who's making rotors for the new2) The inside bore diameter should be 54,1mm (I haven't checked yet), diameter of the disk is 258mm, 4x100 bolt arrangement, but I still didn't find any compatible replacement disk. Maybe a larger diameter brake disk wouldn't pose a problem?!?
1.1. and if the brake pads from the DY work on the DE... or what company makes brake pads for the new2...
3. I'm waiting for the lower springs to come, so my search for coilovers is, well... over, nobody makes coilovers for the new2.
3. Do you have any idea if I (an amateur) can take the plastic cover off of the engine and find the intake body outer diameter to fit silicone hoses and a carbon dynamic airbox plus aluminium hose to the lower part of the front grill?
4. Anybody know where I can find the hot gas return hose from the valve cover to the intake body? I wanna fit an oil catch tank...
5. I guess a shortshifter is out of the question, no?
6. Anybody found a lightened flywheel maybe? (I know, don't shoot, I'm just saying...)
7. Any info on rear axel brake disk conversion for the new mazda2? It has drums now, they work fine, just need to know if it's possible.
1. you will need a caliper relocation bracket if you plan to get larger disc. How big do you need to go? Ever thought of looking at Miata fitments? Also, when you go that much larger up front, the brake bias will change as well, especially if you charge the piston size.. but if you are just looking at getting a larger rotor and keep the same caliper or at least caliper piston size, then you can start looking for a steel milling company that can cut a bracket for you. I'm in the USA, so for me to find a race shop that can do that isn't too much of a problem, it all depends on how much you want to spend.
1.1. Once I get the car in my hands, I will talk to my sponsor to see what other options are there (usually the pad will have a model number that is usually common to find among brake pad manufacturers). What kind of pad are you looking for? There's many kinds of performance out there. What is your temperature range and what kind of mu friction coefficient are you looking for? Are you ok with brake noise (like race pads) or do you need something low dust like ceramics pads would offer?
2. Coilovers are easy enough to find (just have to look in japan for what's already there). I'm currently going to source a set of Cusco Zero-1s since they come with camber plates and have one of the best valving and spring setups for the rough USA roads while still maintaining a lot of control. I've raced for many years (over 10 soon) on Subarus using Zeal/Endless, RS*R, Tein, HKS, Apex'i, and Cusco in the process. Bilstein and H&R should be available. What is your budget and what you want out of your car for handling? Here is what I'm about to look into and buy:
http://www.rhdjapan.com/cusco-compact-zero-1-coilover-kit-mazda-demio-61368?nflag=1
3. Sure, just get a digital measuring caliper and start measuring. In the USA, we have
www.mcmaster.com which is basically a warehouse company that supplies all sorts of items to your design needs. I dont know what it common in Europe though.
4. Ask any mechanic, they'll point it right out. I dont know the European motor very well to point it out to you, but it's not hard to find as it's just a breather hose that goes near the intake manifold from the engine case.
5. Short shifter should be easy enough, but you do you need to know the similar bracket to hook the shifter shaft higher up on the shifter to make it 'shorter'. It can be done, just a matter of some metal engineering to make it happen.
http://www.perrinperformance.com/pr...Shifter-5-spd-w-Bushings?category=81&model=10 makes adapters like these for Subarus to fit onto the linkage. Or if you are daring enough, you can get a machine shop to fabricate a new and shorter shifter linkage for you.
6. How much lighter you want to go??? Any lighter and the car will stall out.. it's not like Mazda2 motors make a lot of power to begin with. Also, any lighter than what it is could lead to a mis-firing code (it's been known for a lot of cars..) I've heard some race shops can machine the OEM flywheel down to shave off a few lbs.. but you just have to worry if you are shaving too much mass off the flywheel.
7. Problem is that if you change to a disc system, you'll have to look into how the OEM setup is used. I'm not sure if the rear drums on the OEM system is hydraulic driven. If it's not and it's actually a electronic motor pulling on the dual-channel emergency/parking/side-brake system, then most likely you wont be able to find an effective caliper to match the disc. Unlike Subarus with the rear being multi-link AWD driven systems, the Mazda 2 uses torsion beams. In other words, there's really no "axle". The knuckle, wheel bearing assembly are all bolted onto the torsion beam. As far as I'm concerned, there's really no "upgrade" for this OEM setup. You would need to look for other cars that have similar OEM torsion rear beam suspension and see if they have drum-to-disc upgrades.. and if they do, I would check to see if they are mechanical cable driven or hydraulic driven.
Hope that helps.
