AMS looks at pad options for the Brembos. WTH???

[GenX]

Dan got a chance to take the brake pads out of the Brembos yesterday and found something quite interesting.

The front pads are identical to the Evo VIII-X except that the pads have a large portion of the friction material's leading and trailing edges milled down to effectively make the friction area much smaller. This is not the typical leading / trailing edge taper you see on pads to reduce stress risers, but a blatant removal of material to reduce front brake power.

It appears that Hyundai might have grabbed an off the shelf Brembo kit for another application and slapped it on the Gen Coupe and then found brake bias issues. Instead of the band-aid fix (cutting the pad area down), they should have properly sized the brake master cylinder and caliper pistons.

The rear pads are much larger than the Evo VII-iX and even the Evo X pads so we need to look into pad options as this size pad is new to us.

AMS will be exploring the brakes a lot more to see where we can make improvements and sort out any factory deficiencies to open up more pad options.

 

[guerro]

So does this mean if someone replaces his pads with ones that are not tapered down as extremely as the stock pads that they will cause braking issues ?? Please elaborate on what you are saying here. Pictures of the stock pads vs the EVO pads would be cool to see.

TIA

 

[GenX]

So does this mean if someone replaces his pads with ones that are not tapered down as extremely as the stock pads that they will cause braking issues ?? Please elaborate on what you are saying here. Pictures of the stock pads vs the EVO pads would be cool to see.

TIA

To simply answer your question... If a pad with the full amount of friction material was put in the front, it is very likely that this would throw off the brake bias enough to cause issues with braking and the ABS system.

Brake systems are very complicated. Every component must be matched for optimum performance. There are so many things to consider. Vehicle weight and weight distribution, tire size and grip, rotor diameter, pad dimensions and friction material, front and rear master cylinder piston diameters, front and rear caliper piston diameters, ABS programming, etc etc etc...... The list is huge. If any of these things are not considered when designing the brake system, you will end up with issues.

To me, it would appear that Hyundai found an issue with the brake bias and the band-aid fix was to cut the friction area of the front pads down to help with the issue. There is no point in having such large rotors and calipers and a tiny pad on the front. This will limit the thermal efficiency of the pads and could lead to burning up pads much quicker than with the full amount of friction material. This also limits the choices you have when it comes to pad replacement. There are many pad options out there for the Evo Brembos including Performance Friction, Endura-Tech, Ferodo, Brembo, etc... But a cut down pad is a different story..

 

[guerro]

Thanks for the detail. This seems like a good question for Hyundai. I wonder if they would be willing to give a straight answer or if lawyers would get in the way ?

 

[i8acobra]

Seems like maybe they used the hydraulics off a FWD car, like a Tiburon. A FWD car would need a strong front bias to deal with the fact that most of the weight is up front. They probably oversized the rears (explains them being larger than EVO brakes) and shaved down the front pads to compensate and add some rear bias.

 

[monblanc]

I think there is a youtube clip from korean magazine review on Genesis Coupe pointing out this brake pad.

the video (with english caption, made a while ago in korea) also pointed out some unused feature of body/suspension which I did not fully understand...

 

[GenX]

Top row / Front pads: GC on the left, Evo 7-10 on the right

Bottom row / Rear pads: GC on the left, Evo 10 center, Evo 7-9 right

 

[Fast01Rio]

interesting! the bottom pad and the Evo pad on top look almost identical.

 

[Turn In Concepts]

Now that just doesn't make sense. need to do a brake bias calculation to see where it sits and how this affects it.

 

[team23jordan]

saw a video about that somewhere on the korean website
they also didnt know why hyundai only put a single bushing in the rear

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[Goose]

I know this thread's a little old, but here's another take on this:

In a way, it's nice that Hyundai approached the Brembo "upgrade" in this manner. The "cheapo" bias adjustment they chose to do probably helped reduce development costs, thereby keeping MSRP in check. If something works for 90% of the drivers out there, why reinvent the wheel? Although not very impressive "engineering", such cost-cutting probably helped keep the Genesis the bargain that it is.

Besides, where's the fun in having to rip out perfectly good parts in order to personalize your car? I think Hyundai is really onto something by such lower-cost upgrades and creating options such as a stripped-out version (R-Spec?) to provide a low-cost blank canvas for tuners. They're gonna sell a ton of these cars...

 

[White2.0GT]

the brakes were developped by Brembo...its not just a case of an off the shelf kit I'm sure. There is probably a reason. I can tell you this much...when my car finally arrives I will be installign EVO pads for sure.