http://www.youtube.com/watch?v=VZpWlSp2Hvc

Car is completely stock except for:
215/45/17 Star Specs on Enkei RPF1
Berk axleback and 2ndary cat delete
Carbotech XP10/XP8

The BRZ is remarkably stable, even at high speed. Now if I could get rid of this low-speed understeer...


S2000 CR video for comparison.

255/40/17 RS3 on BBS RG-R
J's 70RR
Race pads/brake ducts
Alignment

http://www.youtube.com/watch?v=s1syrlAw1ek

 

maybe ask Darin at west end how he rotates his civic. LoL

 

Very nice. It looks like you need to turn on the in-cabin setting on the camera though so the track isn't washed out.

 

So was that trail braking warning light only a warning light or was the car behaving badly when it came on?

 

Don't these cars have VSC and TCS? I believe even though it's "turned off" it's still on a little bit like the 350z's, maybe you need to actually pull the fuse before going on track?

EDIT: just found that the BRZ come's with this...

4-channel/4-sensor Anti-lock Brake System (ABS) with Electronic Brake-force Distribution (EBD), Brake Assist and Brake Override system.

Can that be turned off? Is this only during braking conditions? It almost looked like in the video the car would get hesitation when it would recognize the inside or outside wheel was spinning faster than the other... Thus tripping the TCS or VSC?

Brake Override System

The Brake Override System (BOS) is an active safety feature first introduced on all 2012 Impreza 2.0i models and will be standard equipment on all 2013 Subaru vehicles, starting with the new 2013 BRZ. It’s important that you understand how the Brake Override System works so you can accurately explain its operation and benefits to your customers. The Brake Override System (BOS) can help prevent claims of unintentional vehicle acceleration because it monitors the simultaneous application of both the brake pedal and accelerator pedal by the driver while the vehicle is moving. Here are key features of the system.

Brake Override System Features

•System Activation Delay – The system has built-in activation delay which senses the accidental depression of both the brake pedal and accelerator pedal. This activation delay allows the driver to realize that both pedals are being depressed simultaneously. If both the brake and accelerator pedals are immediately released by the driver, the system will not activate. If both pedals are not immediately released, the system will activate
•System Activation – The system activates when BOTH the brake pedal and the accelerator pedal are applied. On initial activation, the system is time delayed until the ABS control unit raises the brake fluid pressure to a specific level to control vehicle movement. Engine operation is reduced by closing the throttle plate. Physical application of the accelerator pedal by the driver has virtually little or no effect on engine or vehicle speed.
•Dual Stage Activation◦Light brake pedal application: The system will take longer to activate when both the accelerator pedal is depressed and the brake pedal is lightly depressed. This delayed activation allows the driver to apply the brake briefly and still maintain accelerator pedal control.
◦Heavy brake pedal application: The system will immediately activate when both the accelerator and brake pedal are depressed.

•Deactivation – The system deactivates when it senses only INDIVIDUAL operation of the brake pedal or the accelerator pedal. During deactivation, brake fluid pressure is released and the throttle plate is momentarily activated to maintain drivetrain pressure. The system positions the throttle plate above idle to prevent the engine from stalling while the system reduces the accelerator operation to prevent the vehicle from lunging forward. The system then synchronizes the linear operation of the throttle plate and accelerator pedal for normal vehicle operation.

 

^^^ I find this very interesting, I guarantee that is your problem here. I wonder if this system will cause many problems down the road... Wanting to hear feedback from Psychoazn about how the car felt with this... Seems like it would affect even heel/toe situations...

 

The car just flat out plows when the warning light is flashing. I have to accommodate the system. My best estimate is that when the light is flashing, I'm able to use about 85% of the ACTUAL grip available from the front tires. Trail braking won't let me rotate the car on entry as I'd like, but I'm not sure if that's a result of the car's suspension geometry/understeer, the system doing something it shouldn't, or the staggered brake pads. Unfortunately, I don't have data acquisition yet to assist with this.

 

Heel-toe is just fine, as is left foot braking, contrary to many rumors.

The S2k has the above listed systems as well on 06+ cars, and I've had no issues with my 08.

 

How do you compare the lap time to a stock S2000 with similar brake pads and tires?

 

Stock s2k with a pro driver Charles Ng has done a 2:05.

Brian heikotter - gt challenge winner and now pro driver for nissan in a 370z - ran a 2:06 on a stock s2k - stock tire sizes too - better rubber re-01.

Doug chan has run a 2:06 in a stock s2k with 235/255 rs3s.