mackie
Totally Hooked
Anyone got an insight on the Godspeed kit that uses Clio/A110 Brembo 4 pots? Seems like a good value option vs the AP kit but there has to be a downside right?
GR86 GR86 - Brake Upgrade Guide
- Thread starter Will300
- Start date
They are a bit of an unknown, piston sizes etc and I'm pretty sure it's been said they use an odd sized pad, something from an Aston Martin maybe. @Will300 is the brake man he might remember.
That's not really an upgrade. No weight savings, no increased thermal capacity or braking force, you'll just trade off the safety of the OEM brakes for some slightly better looks (and even that it's subjective).
A better option would be the Megane RS callipers on STI rotors (if you can stomach the weight increase), but I cannot find a ready-made kit.
What makes you think there will be no weight savings? The calipers are aluminium and so are the disc bells. They will be lighter than the stock steel setup without a doubt, you are also increasing the size of the pad and disc rotor so you are increasing the thermal capacity too.
mackie
Totally Hooked
I think the piston sizes are the same (40mm) but despite the big price difference I’m more inclined to go with the Reyland AP kit as it’s a proven known quantity and they use a standard AP ring size so there’ll never be any problem with getting spares.
I’d estimate the AP 330mm kit probably saves at least 1.5kg over stock, plus my new wheels being ~1kg lighter that’s a very worthwhile drop in unsprung weight.
I’d estimate the AP 330mm kit probably saves at least 1.5kg over stock, plus my new wheels being ~1kg lighter that’s a very worthwhile drop in unsprung weight.
Only 1.5kg? Per corner I hope
Essex Sprint kit is 4.5kg (10lbs) lighter per corner, but it's using 299mm rotors.
For Essex Endurance kit with 325mm rotors they are claiming half the weight savings vs Sprint kit.
Ah bugger, someone posted a couple of weeks ago about the OEM wheels and I said I'd try and check the fitment, but I totally forgot.
No idea on the OZ's, I suspect there might be clearance issues with 48 offset.
As for the Enkei's, a friend has a set in 17x9 +45, but he has to run a 5mm spacer, so actually a +40 offset. Therefore they might fit, although I know they don't clear the Performance Pack Brembo's with the +35 offset, due to spoke clearance. However the AP Racing caliper is a fair bit narrower.
See the spreadsheet and additional comments below.
Also from the reviews I've seen the Godspeed discs can be abit hit and miss in terms of quality. With the Reyland kit they generally ship out with Pagid discs. I also don't like the disc mounting hardware on the Godspeed kit, it looks like stuff from the local hardware store, with the Reyland kit your getting AP mounting hardware.
If you just wanted a cheap kit for visual performance, go for it.
If your going to do any form of high performance driving or trackdays I'd spend the extra for the AP Racing kit.
I'm yet to find a source for the piston sizes, I suspect they are 40mm x2 but I can't confirm that.
They use a standard Brembo pad size, the size (pad shape no) is listed in the spreadsheet, so getting pads isn't an issue. The Aston Martin reference might be with the Megane brembos as the calipers are fairly similar.
The Clio Brembo's actually have a smaller surface area compared to the OEM pads. Your only increasing the thermal efficiency, with the Godspeed kit as your increasing the disk size. Hence why the K-Systems Pro kit is basically pointless as it uses the OEM discs. AP Racing kit has a larger pad area, so your getting both thermal capacity with the pad and disc.
This is the only "kit" I could find, but you still need to source pads, discs and lines.
Brembo 4 Piston - 326 x 30 mm [BA0001UST] - Skull Brakes
This kit combines the large brake discs from the Impreza WRX STI in 326x30mm, with the extremely large brake pads from Brembo.
skullbrakes.com
Thanks for this, it's really helpful!!
That EBC kit appears to be an even better option than Reyland (no negatives, better price). That "8 bolt PCD" issue does not seem to be an actual issue, if you look closely at the photos on their site, one disk has 5 holes and the other 8 (in the same photo) and also they are selling both as replacements (decent prices too).
Can't find any reviews though (at least on 86).
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Its only an issue when you come to buy replacement discs, as they are a unique PCD, they've locked you into there platform. Thus you are limited to EBC's stock level and EBC's prices. If you go to order a replacement disc right now on their website (https://ebcbrakesdirect.com/boxed-330mmx28mm-sg-grooved-replacement-disc-ring-lh), they currently only have 1x LH disc in stock at: £197.30. If you need a RH disc (https://ebcbrakesdirect.com/boxed-330mmx28mm-sg-grooved-replacement-disc-ring-rh), there on back order.
With any of the AP Racing kits or kits that run Brembo calipers, you can run discs from multiple manufacturers, i.e. Reyland, Godspeed, AP Racing, PFC, DBA and a loads of others, so your not locked into one manufacturer.
EBC had a mega black friday offer on them and I was seriously tempted, but the lack of disc choice and availability put me off.
I'm aware of one person who's running them, but he doesn't do any trackdays. So no idea on durability.
As I mentioned, I'm not even sure the kit for GR will be delivered with 8-hole rotors, since in the same photo on the product page there is 1 rotor with 5 holes and another one with 8.
Even if the kit is being delivered with the 8-hole rotors, I think those extra holes are for compatibility with different PCDs (for different cars). It's not like you'll suddenly have 8 studs on your hub and can't fit 5-hole rotors from other manufacturers
)I must be missing something as I don't understand why do you think you're locked in their platform...
He is referring to the bolts for the disc rotor to the bell. They use 8 bolts, which is less common and bespoke to EBC.As I mentioned, I'm not even sure the kit for GR will be delivered with 8-hole rotors, since in the same photo on the product page there is 1 rotor with 5 holes and another one with 8.
Even if the kit is being delivered with the 8-hole rotors, I think those extra holes are for compatibility with different PCDs (for different cars). It's not like you'll suddenly have 8 studs on your hub and can't fit 5-hole rotors from other manufacturers
I must be missing something as I don't understand why do you think you're locked in their platform...
I did some digging regarding the k-system kit (Clio RS callipers)...
You mentioned "Smaller pads than OEM (pad material surface area)", but it does not seem to be case:
- pad type: 07.B314.21 is ~122x49mm
- pad type: PFC: 0929 (OEM) is ~115x48mm
Basically, the pad surface area is ~8% larger on the k-system kit vs OEM.
Another idea would be to pair the k-system with Reyland's 295x25mm 2-piece rotors (vs 294x24 stock - not sure about compatibility though).
In this configuration we would have weight savings on both calipers and rotors, better cooling, marginally larger pad surface area and better looks (all vs stock) for around 1500£ (complete kit with ds2500 pads, ss brake lines, 2-piece rotors).
L.E: just got confirmation on piston size from them: 40mm
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Oh
, I was looking at the Centric/StopTech website for the inner pad width (https://www.centricparts.com/disc-brake-pad-set-7025384), and it lists it as 137.2mm, 115mm sounds better when you ignore the length of the tabs on the backing plate.
BBK Spreadsheet updated - 31/05/24.
DBA Brakes Australia have recently started producing reproduction brake calipers.
One of the cars they've chosen to produce reproduction calipers for is the Subaru Impreza STi, with the Brembo calipers, both front and rear. These are a direct replacement for the Impreza.
However like the standard STi brembo's these will also fit on the 86/BRZ and I've noticed a couple of companies have started advertising these for the 86/BRZ (although not specifically mentioning they are DBA calipers), at a very attractive price. Please be aware that like the standard Impreza Brembo's, the front calipers have 46mm/40mm pistons. Which will move the brake bias forward on the 86/BRZ, by a large percentage and should therefore be avoided.
Front Caliper: https://dba.com.au/product/front-street-series-brake-caliper-dbac1520/
The DBA rear caliper use a 40mm piston, which can be used with multiple front caliper options, OE Brembo's with 40mm/40mm pistons (i.e. Performance Pack), Reyland AP Racing kit, Megane Calipers, etc. Which make them and excellent option for an aftermarket rear caliper.
Rear Caliper: https://dba.com.au/product/rear-street-series-brake-caliper-dbac1539/
They also sell OE replacements for the first gen 86 / BRZ.
mackie
Totally Hooked
@Will300 are you aware of anyone using a 4 pot Pro 5000r caliper on the twins? The CP9440 looks to be close in specification to the CP9200 and the price different is negligable (surprisingly). The piston sizes are slightly different however with a slightly smaller overall piston area.
Probably overkill if no one is overheating or melting the dust boots on their CP9200s but I'm interested in your thoughts.
Probably overkill if no one is overheating or melting the dust boots on their CP9200s but I'm interested in your thoughts.
There is a trackday rental company called Hype Motorsport (https://www.facebook.com/hypemotorsportuk), who are running an AP Pro 5000 R caliper on their GR86.
Looking at the photos on their facebook page (below) and comparing them to the AP Racing catalogue (AP website) & Race and Rally (https://raceandrally.com/cp9440-pro-5000-r-4-piston-radi-caltm-caliper), the caliper definitely appears to be the CP9440. The car is also fitted with 17" wheels which would limit options of 6 pot calipers.
Piston sizes should be fine.
It took me about 6 or 7 years to kill my dust boots.
I'd only look at the Pro 5000 R range if the car is a dedicated track car and doesn't get used in the wet or salted roads.
Looking at the photos on their facebook page (below) and comparing them to the AP Racing catalogue (AP website) & Race and Rally (https://raceandrally.com/cp9440-pro-5000-r-4-piston-radi-caltm-caliper), the caliper definitely appears to be the CP9440. The car is also fitted with 17" wheels which would limit options of 6 pot calipers.
Piston sizes should be fine.
It took me about 6 or 7 years to kill my dust boots.
I'd only look at the Pro 5000 R range if the car is a dedicated track car and doesn't get used in the wet or salted roads.
