nikitopo's BRZ OEM+ build

[nikitopo]

I am presenting a journal of my car. It is based on the bares-bones JDM car, with a few changes for the German market. This trim level was offered until the middle of 2015. Now we have only the high spec trim. It is not a daily driven car, but a weekend fun car.

September 2014: Car arrived ...






January 2015: Rims Enkei Racing RS05 (16 inches), Project mu lug nuts






April 2015: Spoiler & badge delete, new tires (Advan AD08R)








June 2015: A/C delete




November 2015: STi flexible tower bar, STi bolt support rear sub-frame & upper stopper








February 2016: Smaller battery based on the bare-bones JDM car




June 2016: STi steering bolts




August 2016: Toda Racing pulley kit






April 2017: Toda Racing bigger throttle body




September 2017: Sachs Performance Coilover Suspension

[nikitopo]

November 2017: OEM +'17 exhaust manifold with thermal coating and Cosworth tuning kit (stage 1.0)










February 2018: Toda Racing Light Weight flywheel & clutch kit (3 puck metallic disc)






May 2018: Rear OEM +'17 stabilizer bar




August 2018: STi shift knob Duracon & Yuasa battery (Made in Japan)






October 2018: STi air filter & STi connector (sound creator)






May 2019: STi fender garnish




June 2019: STi performance muffler






August 2019: Bilstein JDM tS suspension

[nikitopo]

After a long time, I am ready for the next step. I'll make an order for the Toda big throttle body. I used once the sprint booster (throttle controller) and the results were quite good (*). Only issue was that the car was very nervous during city driving (e.g., traffic lights). Personally, I couldn't used to it and the only solution was to take it off. I expect the throttle body change to be a much better option, without any of the disadvantages. Toda parts are very rare and this one are saying will need a 60-75 days period for delivery. Let's see when it will be delivered.


(*) The engine was more responsive, it could rev quicker and there was a small torque increase in the low-middle area. Probably because more air was getting in, than the tip-in enrichment.

[Clipdat]

Interesting, I didn't even realize those wheels came in 16"

[nikitopo]

First post updated with the Toda Racing throttle body.

[Battlerobot]

Are those RS05 reps? I thought they only came in 18in...

[nikitopo]

Originally Posted by Battlerobot

Are those RS05 reps? I thought they only came in 18in...

They were imported from Japan. You can find them here:

http://www.enkei.co.jp/wheels/racing/rs05/

[Battlerobot]

Originally Posted by nikitopo

They were imported from Japan. You can find them here:

http://www.enkei.co.jp/wheels/racing/rs05/

Interesting! Just wondering, is there a specific reason why you went with 16 over 17 or even 18?

[nikitopo]

Originally Posted by Battlerobot

Interesting! Just wondering, is there a specific reason why you went with 16 over 17 or even 18?

They were used by STI in the official Gazoo sponsored race car. I liked them, so I ordered them. Here is a photo of the wheels in the original car:



Overall, you don't need bigger wheels. Only if you have bigger brake calipers or for aesthetics. The Advan AD08R tires have very stiff sidewalls, so they can compensate the more rubber.

[new2subaru]

Can you tell me the sizing on the tires please? I downloaded the pic and zoomed in but I still can't read it.

[nikitopo]

Originally Posted by new2subaru

Can you tell me the sizing on the tires please? I downloaded the pic and zoomed in but I still can't read it.

205/55 R16 91V

[TylerLieberman]

Originally Posted by Battlerobot

Are those RS05 reps? I thought they only came in 18in...

You're thinking of RS05RRs. The RRs and the normal RS05s are different and come in different sizes.

Just like their:

PF01 vs PF01 EVO
GTC01 vs GTC01RR
NT03M vs NT03RR

[nikitopo]

I had the chance to test the new throttle body. I didn't test it thoroughly, because there was traffic and then it started raining. However, I managed to make a few pulls up to 4-5k RPM with partial throttle and one with full throttle. The car has definitely more torque and the engine runs much smoother. I was a bit puzzled how this can happen with just a small size difference, so when I arrived home I studied the stock part.

It looks that the stock tb has some design issues like that the inside surface is quite rough and overall the tapered shape is not very smooth. It is like they glued two different pieces together, but without fitting them exactly. I am not sure if this was made on purpose or just for keeping the cost low. However, these differences together with the size increase (+2mm) of the new tb, gave an impressive result.

Additionally, I didn't see any disadvantages like higher idle RPMs etc. I heard at the beginning there were such kind of issues, but it looks that Toda managed to solve them because this is a revised part (16400-FA2-002 instead of the older 16400-FA2-001).

[Tcoat]

Originally Posted by nikitopo

I had the chance to test the new throttle body. I didn't test it thoroughly, because there was traffic and then it started raining. However, I managed to make a few pulls up to 4-5k RPM with partial throttle and one with full throttle. The car has definitely more torque and the engine runs much smoother. I was a bit puzzled how this can happen with just a small size difference, so when I arrived home I studied the stock part.

It looks that the stock tb has some design issues like that the inside surface is quite rough and overall the tapered shape is not very smooth. It is like they glued two different pieces together, but without fitting them exactly. I am not sure if this was made on purpose or just for keeping the cost low. However, these differences together with the size increase (+2mm) of the new tb, gave an impressive result.

Additionally, I didn't see any disadvantages like higher idle RPMs etc. I heard at the beginning there were such kind of issues, but it looks that Toda managed to solve them because this is a revised part (16400-FA2-002 instead of the older 16400-FA2-001).

How did you measure this?