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Old 08-07-2012, 04:07 PM   #1
ABQautoxer
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Default My BRZ RTR thread

This won't be as serious as most of these as this will primarily be used for local events but it will have the same prep as if I were competing in it nationally and you never know, it could happen.

Start with the car, a 2013 Silver BRZ Limited 6MT. All the BRZs in my area were sold out until 2014 so I pre-ordered a no option FR-S. However this one popped up as a cancelled order so I went to check it out about 5 minutes after I was told about it. After some negotiating on my trade I bought it. I originally wanted the FR-S due to the spring rate differences and lighter weight but after I had this option presented to me I re-evaluated my position, as this is my daily driver, and my outgoing daily driver had every feature the BRZ Limited would have. I knew I wouldn't be "missing" anything, so weight and spring preferences were thrown out in favor of the better car for the rest of the time it wasn't being autocrossed.

So far the car has 137 miles. I ordered factory camber bolts yesterday and will have it tinted on Friday. The alignment can't happen until after SCCA nationals due to time. Around that same time I'll order some Star Specs in 225/45/17 to start on the stock wheels. I already contacted Sam Strano to get one of his 22mm front sway bars and koni sports when they are out and will likely install a Nameless axleback exhaust for the sound and minor weight savings. I did read where RallySportDirect had some success with an Apexi air cleaner so I might give that try for $40. Since I do my own alignments I will play around a lot with the rear toe as I tend to like very little with a bigger front bar but having yet to turn a wheel in anger on this car it is all speculation now.

This year I've been running my first year in a 2008 STi which was replaced with a 2012 WRX in RT and RTA shared with the car owner/co-driver. We'll both use the BRZ for local events and the WRX for national events as long as things stay the way they are with rules and such. I'm loving the BRZ so far, I am a huge Miata, MR2, and CRX fan and this feels like those cars 20+ years later with all the refinements and upgrades that could happen in that timeframe.

Here are some pics of how she looked the day after I drove her home from the dealer:




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Last edited by ABQautoxer; 08-20-2012 at 10:08 AM.
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Old 08-07-2012, 04:35 PM   #2
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Rear Koni's should be the same as the GR chassis WRX if my measurements are correct.

The JW2 Turndown has been tweaked slightly to better fit the BRZ, you'll need one of those as well!

I'd opt for a slightly wider tire than the 225, even thought the rims are skinny, but YMMV. Have fun!!
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Old 08-07-2012, 04:41 PM   #3
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I put a lot of thought into the choices so far but of course that doesn't mean I'm right. I'm waiting to see if those konis do fit (someone else can be the guinea pig) and then if the valving is right.

I opted not for the delete as this will be a local use car and that 9lbs or so the nameless saves is enough for the hassle of not having to change it. I should get to hear a muffler delete FR-S this weekend and that may or may not change my mind.

I picked the 225/45/17 for two reasons. One is due to our smaller local lots that use a lot of first gear its better to have a taller than stock first gear rather than shorter. Secondly because its $48/tire more for the 235/40/17 star specs and again this is for local playing around until I figure out an alignment and wait for Strano and Koni parts.

Last edited by ABQautoxer; 08-07-2012 at 04:53 PM.
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Old 08-07-2012, 09:01 PM   #4
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When does Sam expect to have the 22mm bar available? There is a 16mm and 21mm Cusco solid front bar available right now. I'm going to drive the car for a couple of events on the A6s before I decide I want to move to a larger front bar. Will be interesting to see how things differ between the FR-S and BRZ.

There are a number of people working on a lighter single-exit catback but the car looks a little funny with the single exit exhaust. Freed Engineering is close to releasing theirs, it'll be about $600 and it weighs 12-13lbs which is around 25lbs lighter than stock. 2.5" piping. Here is a picture, it's not that bad looking. http://farm8.staticflickr.com/7131/7...c92dbccf_b.jpg

As you probably saw, Perrin released some revised dyno numbers for their catback and unlike Nameless they found replacing the factory midpipe with a new 2.5" one very beneficial. I think their catback with no resonator and dual exit is around 26lbs, which is 12-13lbs lighter than stock. They made around 8 ft-lbs and 5-10whp with midpipe+axleback versus around 3whp with just the axleback. I have a Nameless track pipe now but I'm also looking for something I don't have to change, even if it only takes 5 minutes. Amuse has a nice titanium tatback, I think it's 18lbs for a dual exit catback, only $3500.

I've contacted a few places with regards to building a DA shock for the car. So far the results are sort of expensive, expensive, and really expensive. However the expensive and really expensive options are user rebuildable/revalvable shocks.

Good luck with the car!

Last edited by dwx; 08-07-2012 at 09:10 PM.
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Old 08-07-2012, 09:24 PM   #5
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egggselant.....hope all goes well

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Old 08-07-2012, 10:17 PM   #6
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Quote:
Originally Posted by dwx View Post
When does Sam expect to have the 22mm bar available? There is a 16mm and 21mm Cusco solid front bar available right now. I'm going to drive the car for a couple of events on the A6s before I decide I want to move to a larger front bar. Will be interesting to see how things differ between the FR-S and BRZ.

There are a number of people working on a lighter single-exit catback but the car looks a little funny with the single exit exhaust. Freed Engineering is close to releasing theirs, it'll be about $600 and it weighs 12-13lbs which is around 25lbs lighter than stock. 2.5" piping. Here is a picture, it's not that bad looking. http://farm8.staticflickr.com/7131/7...c92dbccf_b.jpg

As you probably saw, Perrin released some revised dyno numbers for their catback and unlike Nameless they found replacing the factory midpipe with a new 2.5" one very beneficial. I think their catback with no resonator and dual exit is around 26lbs, which is 12-13lbs lighter than stock. They made around 8 ft-lbs and 5-10whp with midpipe+axleback versus around 3whp with just the axleback. I have a Nameless track pipe now but I'm also looking for something I don't have to change, even if it only takes 5 minutes. Amuse has a nice titanium tatback, I think it's 18lbs for a dual exit catback, only $3500.

I've contacted a few places with regards to building a DA shock for the car. So far the results are sort of expensive, expensive, and really expensive. However the expensive and really expensive options are user rebuildable/revalvable shocks.

Good luck with the car!
Sam has no ETA so I'm debating on waiting. The cusco would be more tempting if it was 21mm but what I read is its 20mm. I'm waiting for some quality feedback otherwise I'll wait for some events and see what I think it needs when I get to autox it in late September or October sometime.

Yeah I could have AST's done but even with a Tour win contingency discount its would still be a healthy chunk more than Konis could possibly cost and again at this point this is out of the car's intended budget.

I did read that about Perrin's catback, it makes it more tempting than Nameless but I have the luxury to see how that plays out so I'd love to hear what you decided and like. I agree a single exit is not elegant and not on my list for an everyday solution.

This is great info sharing and could apply to C stock so feel free to keep posting like this. I'm a little behind on researching having been on the fence about my own WRX or a FRS/BRZ and only recently pulling the trigger on the BRZ.
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Old 08-07-2012, 11:36 PM   #7
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You are right 20mm.

I've been talking to Vorshlag and they are looking at using Bilstein Motorsport shocks instead of ASTs. The ASN or MDS series shocks. They would fall into the expensive category with the really expensive being Penske based. Vorshlag is busy with some other projects right now but plan on doing some more work on the BRZ end of this month or early next month. They have their own car to do development on which is a plus.

As anxious as I am to start doing stuff realistically I am prepping the car for next year so I'm trying to remain patient and wait for some other guinea pigs.
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Old 08-07-2012, 11:42 PM   #8
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Fyi phatbotti tuning is now doing BRZ's. Pm me for info.
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Old 08-08-2012, 12:41 AM   #9
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I don't think you understand the rules, tuning is not allowed in RTR/CS.
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Old 08-08-2012, 01:11 PM   #10
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What are the wheel options for RT/Stock?

Same width, offset +/- something right? I can't remember if spacers are allowed.

i.e. how can you get a 245 on the front?
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Old 08-08-2012, 01:25 PM   #11
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You have to use the stock size rim, but you are allowed +/- .25" difference in offset which is a little over 6mm. BRZ wheels are 17x7 +48. So +42 is low of an offset as you can go. You can use spacers.

My rims are +42 offset. With a 245/40 Hoosier A6 there is still a decent amount of room between the tire and the front spring perch. The rear has tons of room, you can easily run a 275 tire back there, and at least one person put a 275/40 A6 on the stock 17x7 rim. Not going to fit in the front though.
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Old 08-08-2012, 02:40 PM   #12
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Thanks for the info dwx, very good to know the fitment.


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Old 08-13-2012, 01:15 PM   #13
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Finally got to hear and drive an FRS with muffler delete this past weekend. That definitely will be a viable thing even on a daily driver and a non-issue for sound limits. Only 300 miles on the car so far with with another out of town trip and then finale/nationals the car won't be ready for autocross until mid September. I should have a set of star specs and a new muffler delete with dual exhausts by then. Yes I know its not as light as a single exit but I hate how that looks so I'll take a few pounds hit to have something that looks better as its still primarily my daily driver. Also the upcoming RPF1s in 17x7 will be the wheels I get in October. I'll probably have the car completely ready just in time for our last two events of the year in November.
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Old 08-13-2012, 02:42 PM   #14
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Do keep in mind that for RTR you aren't going to want to attempt a 275. I am not sure what the limit is for a set of Star Specs on a 7" wheel though. I am betting something around a 235/245 before you are too pinched.
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Old 08-13-2012, 02:52 PM   #15
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I would start with 225s if its a wider measuring tire like a star spec.
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Old 08-13-2012, 03:23 PM   #16
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The Star Specs take being pinched better than most though. I know on the 8" the 255 is about the top end of what you want to do from an Auto-X standpoint. You might be able to get away with the 235 on the 7" then if the math holds. But like you said, probably not worth the extra 50 bucks a corner.
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Old 08-13-2012, 03:29 PM   #17
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The Star Specs take being pinched better than most though. I know on the 8" the 255 is about the top end of what you want to do from an Auto-X standpoint. You might be able to get away with the 235 on the 7" then if the math holds. But like you said, probably not worth the extra 50 bucks a corner.
I disagree with you on the 8". I feel like we have been very quick on the 265s on the WRX this year and the wear has been fantastic. But yes on the BRZ the 225 might be a better starting point and price does factor in. I will probably try the 235s afterwards though just to be sure.

Spoke with Nameless via email, looks like they will release their axleback with 4" and no mufflers later this week. They have me down for a mufflerless version.
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Old 08-13-2012, 03:39 PM   #18
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I ran a 245 Dunlops on my 09 WRX's 7" wheels and it was quite sloppy, but doable. I typically ran 48F/52R with that setup to eliminate sidewall flop and numbness. With the lighter weight of the BRZ, I'd lean to a narrower tire on it's wheels.
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Old 08-13-2012, 05:20 PM   #19
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Summary of initial setup the car will have:

Phase 1
dual outlet muffler delete
225/45/17 Star Specs
crash bolts
alignment (zero toe front, near zero rear)
stock wheels
stock front bar
CG lock

Phase 2
dual outlet muffler delete
235/40/17 Star Specs
alignment (with revised toe settings after phase 1 runs and front bar testing)
crash bolts
RPF1 wheels
20 or 22mm front bar
Koni sports (hopefully out by then)
CG lock
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Old 08-14-2012, 11:18 AM   #20
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Stupid wheel question:

The stock offset is +48. There is a pretty small gap between the tire and strut. I assume that is your pinch point. Wouldn't you want to move the wheels away from the strut when picking a new offset - i.e. +54, not +42? Or does that not exist?

Am I interpreting something wrong?
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Old 08-14-2012, 11:28 AM   #21
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You have the right idea, just backwards on the offset math. Away from the strut is lower positive offset. So +42 is 6mm farther from the strut than +48.

offset is how far the hub facing portion of the wheel is off the centerline of the wheels. So +48mm the face of the wheel that contacts the hub is +48 to the outside of the wheel. Thats why wheels that stick out farther for those hellaflush kids are +25-35 range on this car.
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Old 08-17-2012, 09:25 AM   #22
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Installed the crash bolts last night. The shocking part is unlike other Mcstrut front cars, this car's toe didnt change when I installed them. I didn't have the camber gauge for a before but the after result is the front now sits at -1.6 on both sides. I measured the rear but was on suspect ground (LR -1.6 RR -1.9). I'll get it strung up and measured on an area I know is level later on to confirm the stock rear before I loosen things up and change it.
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Old 08-20-2012, 10:01 AM   #23
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Stock tires suck has now been confirmed. I thought they were a lot better than any magazine/video had said as around town, they seemed to have more than enough grip. However, literally the second gate in an autox course confirmed just how bad they were. It was extremely hard to have a minimum of slip angle in/after transitions due to this. I took runs on the same course in the RTA WRX and then in the BRZ that is bone stock other than crash bolts. It's pretty shocking the difference at this point:

BRZ:

WRX:
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Old 09-12-2012, 12:34 PM   #24
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Back from Nationals and had time to get some stuff done on the BRZ. Thanks to Stranoparts I now have a Nameless Performance Muffler Delete and Stoptech street performance brake pads. I can now finally hear the engine but I wasn't a fan of how the pipe sticks out so I painted it black with bbq black paint which so far is holding up well. The brake pads so far are perfect, they have a bit more bite and lot less pedal effort to achieve what the stock pads can do. This feels like, IMO, how it should have come from the factory. Also it makes it a lot more like the WRX brakes making that change much less severe. Today UPS should be delivering a set of 225/45/17 Star Specs for the stock wheels. Those will only be used on the street for a couple weeks before I get the tires in to put on the SSR Comps in 17x8 I bought recently. That just leaves the front bar and shocks. If all works out I should get the bar done in a month or two but there is no ETA for that. I'll be doing a full alignment this weekend and then autocrossing this setup in just over a week at a large site during a two day event doing back to back runs with the WRX (RTA DS).

PS - I also adjusted the clutch engagement point, I should have done this the day I bought the car. Much better and closer to the floor.
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Old 09-12-2012, 01:22 PM   #25
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Quote:
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PS - I also adjusted the clutch engagement point, I should have done this the day I bought the car. Much better and closer to the floor.
I've been struggling with the high engagement point (also my first manual, but I'm not an idiot and don't suck); how low is your clutch? Even with the brake? Lower? Higher? Is it THAT much better?
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