A hot lap of Thunderhill in my stock 2013 Subaru BRZ

[smmmurf]

Here is a lap from last Monday in my 2013 Subaru BRZ Limited.

[ame="http://www.youtube.com/watch?v=HdZY1l08veM"]Stock 2013 Subaru BRZ @ Thunderhill 02/25/13 Toyota GT86 Scion FR-S - YouTube[/ame]


The BRZ was on the original Michelin Primacy "Prius" tires and aligned to -1.4 degrees of camber front and rear with zero toe. The brake pads were changed to Ferodo DS2500 and the lines were flushed with Motul RBF600.

Laptime: 2:15.87

[HighbreadEH3]

Very nice! I hope to bring the FRS up there once I break it in.

[Clipdat]

Nice lap, looked pretty fast! Thanks for sharing this!

[PMok]

very nice, and fastest (near) stock lap of a BRZ at THill that I've seen... mine is similar specs but the day in December I went it was rainy and damp and I wasn't nearly as fast.

[MyRx]

Originally Posted by smmmurf

The BRZ was on the original Michelin Primacy "Prius" tires and aligned to -1.4 degrees of camber front and rear with zero toe. The brake pads were changed to Ferodo DS2500 and the lines were flushed with Motul RBF600.

Laptime: 2:15.87

Regards the OEM tires, do you think you could have pushed it a lil more or did feel you were at the tires' threshold? Mind sharing if you recorded tire pressure, temps? These tires do love to squeal.

I plan to run the OEM tires as well with the SSL lines and blue Ate already on the car. Pads are < than week turnaround. I was not tempted to get an alignment but I'm learning otherwise. Thanks for sharing.

[MyRx]

Aww man, you're in Pleasanton! Hello neighbor, San Ramon here

[sw20kosh]

Awesome driving! That's fast for stock tires!!!

[orthojoe]

WOW! FANTASTIC DRIVING! The benchmark has been set.

Were you able to get the -1.4 camber with the stock bolts, or did you have to get an aftermarket kit?

[smmmurf]

Hey, thanks for the compliments guys! This car is a lot of fun and pretty intuitive to drive on the stock suspension/tires.

With regards to the alignment, it was done with camber bolts. I do not believe there is any stock adjustment. The tires only exhibited minor tread block scrubbing at 32 psi cold all around. The idea was that if I went to the track with zero camber, I would have probably ruined the tires in just one day due to edge wear.

In response to MyRx, my perception is that I was at the limit of the stock tires in all the corners and braking zones. I think I could go just a little faster if I were to rush shifts or run up further on the curbs, but I try not do either of those things in daily driven street cars.

By the way, if anybody knows of a shop (i.e. CSG, Robi, Evasive, etc.) that is interested in a driver for time attack/racing/testing, I'd be very interested in the opportunity!

Thank you,
Sean

Originally Posted by orthojoe

WOW! FANTASTIC DRIVING! The benchmark has been set.

Were you able to get the -1.4 camber with the stock bolts, or did you have to get an aftermarket kit?

Originally Posted by MyRx

Regards the OEM tires, do you think you could have pushed it a lil more or did feel you were at the tires' threshold? Mind sharing if you recorded tire pressure, temps? These tires do love to squeal.

I plan to run the OEM tires as well with the SSL lines and blue Ate already on the car. Pads are < than week turnaround. I was not tempted to get an alignment but I'm learning otherwise. Thanks for sharing.

[icemang17]

nice driving.....very fast lap.....clearly the camber + upgraded brakes translate to much faster lap times.....I would also guess that the slightly more understeer bias of the BRZ helps at Thunderhill too.....

[smmmurf]

Originally Posted by icemang17

nice driving.....very fast lap.....clearly the camber + upgraded brakes translate to much faster lap times.....I would also guess that the slightly more understeer bias of the BRZ helps at Thunderhill too.....

The brake pads certainly allow for better performance over a couple of sustained laps but probably make a only negligible difference in a single lap's time. I believe braking is mostly traction limited, especially on stock tires.

The extra -0.75 camber over a stock alignment may have improved front traction a little, but the main benefit was better tire wear. The lack of rear toe in compared to stock specifications was probably just as large of a factor in making the car more neutral.

I thought the BRZ was nicely balanced at the track for a street car. It did understeer a bit as you mentioned. I haven't tracked an FRS for comparison but would love to try one given the opportunity!

[sw20kosh]

I just ran both my bypass video and your video side by side (comparing 1-4 & 6-15). We were identical. But I had the advantage due to tires so your skill made up for lack of grip. Excellent!

I have work to do.

[smmmurf]

Originally Posted by sw20kosh

I just ran both my bypass video and your video side by side (comparing 1-4 & 6-15). We were identical. But I had the advantage due to tires so your skill made up for lack of grip. Excellent!

I have work to do.

Yeah, I'm sure switching up the OEM tires makes a significant difference. I feel like I'm not even stressing any component out except the tires when I'm tracking on the Michelins. Kind of a good feeling actually.

I like comparing stock tire times since not everyone upgrades to the same rubber (and all the car magazine tests are done on the Primacy's so it gives you a benchmark to shoot for).

[Trap63]

WOW!" Great.....a nice circuit....beautiful the downhill section.....finest!!!!!
What do you think about R1-R and/or Toyo R888GG on BRZ?