View Full Version : Brake upgrade options for bg astina
mcwilly
25-01-2011, 10:02 PM
Looking at upgrading the brakes on my bg astina but still want to be able to run 4 x100 wheels and 15". Are there kits from willwood etc or other options that are good upgrades. I have searched and found a thread by Dave but wondering wat other options I have
I run 15s as well and it looks pretty tight. Maybe just rotor and pad upgrades? You can get a DBA 4000 series rotor and some track spec EBC or QFM pads.
mcwilly
25-01-2011, 11:10 PM
Yea I really wanna go twin pots if possible as I wanna start doing more racing and I'm just gonna cook them
http://www.astinagt.com/forums/showthread.php?t=10847
Here are some options for twin pot.
I doubt anyone respectable will make a kit for our BGs. :( Perhaps give Hoppers Stoppers a call? They are Australian.
project.r.racing
26-01-2011, 08:01 AM
How much you wanna spend?
Willwood, D2 and K-Sport are all options I have found.
See my old thread:-
http://www.astinagt.com/forums/showthread.php?t=17384
mcwilly
26-01-2011, 09:25 AM
Prob under 2k or around 2k I'd rather brand new brakes rather then second hand ones and bigger is better aslong as it fits in a 14" or 15" wheel for racing
rodhog
26-01-2011, 03:24 PM
well then your limted to certain issues caliper wise PBR race twin spot also known as the Group A VN brakes - problem with them is noise , excellent on track noisy as on street. Due ot no pins in them. but they can't seize. other option is VT type caliper but they require around a 280mm rotor so you have to have 15inch or larger wheel.
is this for drag use or circuit because if it's circuit go to 16inch rim.
Why go a 16" rod? BG is a pretty light little car and racing semi's and slicks are both real cheap for 15" rims. And going 16" won't change the max width of tyre that can be fitted inside the guard with either. You'll always be limited to about 225-35mm. If good brakes fit, may as well stay 15 and get cheap tyres for many track days.
project.r.racing
26-01-2011, 05:28 PM
11.25"/285mm rotors will fit fine under good lightweight forged rims.
If running regular street rims that have extra alloy at the drop well, the you might only get away with 270/274mm sized rotors.
project.r.racing
26-01-2011, 05:43 PM
http://cgi.ebay.com/ebaymotors/Ksport-ProComp-6-Piston-Brake-Kit-91-98-Mazda-MX-3-_W0QQcmdZViewItemQQhashZitem4cf474647eQQitemZ33051 8783102QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccesso ries
Cosmo Dude
26-01-2011, 06:24 PM
I'd go 5-stud from a GD 626 with twin spot subie calipers.
mcwilly
26-01-2011, 07:03 PM
I have 4 stud wheels already that I don't wanna change I'll be getting custom 15" wheels for drag racing and probably another set for track work. As all require different tyres. Do willwood etc make off the shelf items?
project.r.racing
26-01-2011, 07:07 PM
no off the shelf item for wilwood.
best you could do is this kit, then have someone remake the caliper bracket.
http://www.wilwood.com/BrakeKits/BrakeKitListFront.aspx?make=Mazda&model=Miata MX-5&year=1995&frttype=Disc&reartype=Disc&modoption=w/o ABS
Cosmo Dude
26-01-2011, 07:17 PM
You'll have more options with 5x113.4 than 4x100.
rodhog
26-01-2011, 11:54 PM
I under stand what you mean Derb
well if it has to fit under 15inch rims I'd say adpot in some way the BA V6 rims they fit under 15inch rims.
main issue is larger disc to allow larger roational force. but one has to remember you limit yourself with smaller rims.
The upsize is the following - Less roational mass (except with lightweight type cermaic type) with smaller brakes, you also for drag racing have less weight to carry.
if your going drag racing I'd keep the stock. Hell most cars I know with upgrades all go stock to fit 15inch front runners (yes RWD)
for circuit use IMO depending on how hard you go. You have to question if more then standard is required. Yes you have turbo add on so you need mroe but how much more.
When you consider the time attack winning evo from last year Ran in effect close to totally standard brakes?
standard Sp stopped pretty will if they are in good nick and correct pad. besides I think alot of people underestimate a good factory setup with the RIGHT PAD. MAinly because they don't control there braking well enough on track days.
A bit like the Little mazda 2 comp at OZmazda's wakefeild day IMO was moslty due to braking by the driver. If oyu had telemitry in the car each time I think you would find it mostly the brake effort and application.
Orion
27-01-2011, 12:33 AM
Here is a 4-lug rear drum-to-caliper conversion:
http://www.mazdas247.com/forum/showthread.php?123790366-FS-Wilwood-4-Lug-rear-disc-conversion-BBK
Just thought it might generate some ideas :confused:
Astro Boy
27-01-2011, 10:53 AM
Yea I really wanna go twin pots if possible as I wanna start doing more racing and I'm just gonna cook them
Where's the connection between number of pistons and cooking the brakes?
mcwilly
27-01-2011, 11:03 AM
I didn't word it very well. I want twin pots for improved braking. I want to upgrade because I'm gonna cook my standard ones.
Astro Boy
27-01-2011, 11:20 AM
I want twin pots for improved braking.
Then I'll re-word it :p
Why do you beleive that increasing the number of pistons will increase your braking? Number of pistons is virtually irrelevant in the equation. In fact, my best example at the moment is Subaru. The 2 pistons 316mm front brakes VASTLY outperform the 294mm 4 piston front brakes.
Ability of the brakes to dispense with the heat generated has nothing to do with number of pistons. HSV went from 6 pistons fronts in VZ to 4 piston fronts in VE, and it certainly wasn't a step backwards.
I honestly doubt that you would need more than slotted rotors/high temp pads/racing fluid. Increasing the number of pistons ain't going to do anything on its own.
And if you're only going to a twin pistons single sided caliper, then it's not an upgrade over the single pistons single sided caliper you've already got. To upgrade from what you've got you really need to go to an opposed pistons caliper, not just more pistons on the same side. You will fine a Willwood caliper to suit, there's a green VE SS Commodore that runs in the ARC (which obviously have to run uder 15" rims), but the money you spend you'd be far better off spending it elsewhere.
Rupewrecht
27-01-2011, 11:30 AM
I think you'd be better off using the V6 stub axle, V6 caliper, the 4x100 hub and a blank V6 rotor drilled to 4x100. The V6 brakes fit under 15" rims, and you get a 33% pad area increase vs the 4x100 brakes, as well as a ~20mm increase in rotor size.
Astro Boy
27-01-2011, 11:34 AM
I think you'd be better off using the V6 stub axle, V6 caliper, the 4x100 hub and a blank V6 rotor drilled to 4x100. The V6 brakes fit under 15" rims, and you get a 33% pad area increase vs the 4x100 brakes, as well as a ~20mm increase in rotor size.
That would be the best option on a budget. The increase in rotors size is the important bit. I definitely wouldn't go spending money on Willwood or 10 piston Taiwanese made calipers...
mcwilly
28-01-2011, 12:42 AM
Oh k might not worry bout it then. Just see how the stock brakes go.
Swede
12-03-2011, 01:14 AM
I´m using Clio sport 172 disc 280*24 and caliper. It´s almost bolt on, only some few mods to get this kitt to fit and u will have alot of brake pads to choose from. U can even buy uppgrading kitt to Clio from K-tecracing and just make you´re own brakets.
using stock front discs and calipers back of the car
Here is the car and you can see front and rear brake swap.
http://www.garaget.org/?car=4480
mcwilly
11-03-2013, 06:39 PM
Is it Awd? What power is it making looks like a good build
SLY 323
13-03-2013, 08:39 AM
Do as I have just completed on the BG (really i just copied Mat with his BA), Eunos 800m twin pot calipers, V6 hubs with your 4 stud stub axles, MX5 Turbo 270mm DBA 4000 T3 rotors, and QFM A1RM pads.
HOLY ****, it pulls up bloody quick, not even worn in yet, and zero increase in pedal travel.
Edit; I run 16 inch, and have next to no clearance for anything smaller, so maybe not for you.
mcwilly
13-03-2013, 10:36 AM
Apparently the v6 calipers with 270 rotors fit in 15s so I'll probably do this
Mad Mat
13-03-2013, 11:04 AM
Do as I have just completed on the BG (really i just copied Mat with his BA), Eunos 800m twin pot calipers, V6 hubs with your 4 stud stub axles, MX5 Turbo 270mm DBA 4000 T3 rotors, and QFM A1RM pads.
HOLY ****, it pulls up bloody quick, not even worn in yet, and zero increase in pedal travel.
Edit; I run 16 inch, and have next to no clearance for anything smaller, so maybe not for you.
i have seen GTR's running these calipers with 15's before.. just depends on the rims and how thick the wall of the rim is.
but yes its a worth while upgrade.. i love mine :) still yet to boil the fluid and its just cheap **** dot4 stuff from supercheap haha.. and i haven t been nice to them ether..
project.r.racing
13-03-2013, 11:13 AM
i thinking i'm gonna just get the 270 rotors and get a bracket made up to move the stock caliper out 6.5mm.
Mad Mat
13-03-2013, 11:57 AM
i thinking i'm gonna just get the 270 rotors and get a bracket made up to move the stock caliper out 6.5mm.
Is that on the I4 hubs or the v6hubs??
project.r.racing
13-03-2013, 12:27 PM
I4 hubs.
vBulletin® v3.8.7, Copyright ©2000-2024, vBulletin Solutions, Inc.