K24T Track Build - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

traffic335 · 01-12-2023, 10:03 PM

Starting a K24T track build. I purchased a 2013 Subaru BRZ that had some existing mods for HPDE. I welcome any and all feedback on this journey.

My main goal with the car is to make it competitive against a 718 Cayman GT4 CS.

Before going under the knife for the K24T swap I've planned out some of the following:

Target Tires:
Michelin Slick 27/65/18
Alt: Pirelli DH Slick 285/645/18
Custom Forged Wheel: 18x10 et40 (planned, in design)

Suspension:
Front: Wisefab Front Kit, RCE Tarmac 2 (spring rates to be revisited)
Rear: SPL Rear Control Arms, RCE T2
Whiteline Bars

Brakes:
Front: AP Racing 9660 6-Piston Calipers with 355mm Paragon Discs, Ferodo DS3.12 (in hand and planned)
Rear: OEM Calipers, Stoptech Discs, Ferodo DS3.12

Body and Aero:
Front: Todoroki KMO +30 Bolt on (planned)
Rear: Rolled
Splitter and Wing: TBD

Powertrain and Controls:
Target: 420whp
K24, KPower Kit
G25-660 (planned)
Tubular manifold
FMIC
Turbosmart 60mm gate, BOV
DW twin pump return system
Haltech 1500 Elite with IO Expander

Driveline:
CD009 Transmission
OSG LSD

This is how she sits when starting by testing fitment of 18x9.5 et45s with 27/65/18s to devise ideal offsets for a custom forged wheel I'll be using. It appears the rear could possibly package a 305 if rolled aggressively, but my main goal in the first year is to work up to square setup with a Pirelli 285/645/18 DH Slick. That tire should have a section width of around 11mm wider on the 10" than the Michelin does here:

While waiting for parts to arrive, the target date for the swap to commence is late February. Aiming to be on the track by April for shakedown as the weather turns.

Will_ · 01-12-2023, 10:14 PM

Sounds like an awesome build. Any reason for a custom wheel? I believe Volk makes the ZE40 in that exact spec for our cars.

traffic335 · 01-12-2023, 10:23 PM

Quote:

Originally Posted by Will_

Sounds like an awesome build. Any reason for a custom wheel? I believe Volk makes the ZE40 in that exact spec for our cars.

I'm just not a huge fan of that wheel and it's price point. I have some background in part development and manufacturing so I already have a connection which makes it a more simplistic exercise.

If I ever depart from a non-square setup to go to a larger rear tire for more power, it almost seems as if I could use an 18x10.5 et 42 on the rear. I'm tempted to get a pair of those and test fit a 305/645/18.

jflogerzi · 01-13-2023, 12:17 AM

Good Luck! Holding out for Gen 2 Motor swap myself.

Racecomp Engineering · 01-13-2023, 11:01 AM

Awesome, should be fun. Let me know if you need any help with the T2s.

- Andrew

traffic335 · 01-13-2023, 11:18 AM

I plan to take out most of the interior and move over to carbon doors with only latches and no glass/poly.

RedReplicant · 01-13-2023, 01:57 PM

Going to run a K24Z head for that sweet, sweet simple (but most of all track reliable) manifold?

traffic335 · 01-13-2023, 04:56 PM

Quote:

Originally Posted by RedReplicant

Going to run a K24Z head for that sweet, sweet simple (but most of all track reliable) manifold?

K24A2, I do agree though that the Z would package better.

Irace86.2.0 · 01-17-2023, 01:56 AM

Added you to the K-swap owner's thread. Looking forward to checking out the build.

01-12-2023, 10:03 PM	#1
traffic335 Member Join Date: Jan 2023 Drives: 2013 BRZ Location: Michigan Posts: 28 Thanks: 5 Thanked 16 Times in 9 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	K24T Track Build Starting a K24T track build. I purchased a 2013 Subaru BRZ that had some existing mods for HPDE. I welcome any and all feedback on this journey. My main goal with the car is to make it competitive against a 718 Cayman GT4 CS. Before going under the knife for the K24T swap I've planned out some of the following: Target Tires: Michelin Slick 27/65/18 Alt: Pirelli DH Slick 285/645/18 Custom Forged Wheel: 18x10 et40 (planned, in design) Suspension: Front: Wisefab Front Kit, RCE Tarmac 2 (spring rates to be revisited) Rear: SPL Rear Control Arms, RCE T2 Whiteline Bars Brakes: Front: AP Racing 9660 6-Piston Calipers with 355mm Paragon Discs, Ferodo DS3.12 (in hand and planned) Rear: OEM Calipers, Stoptech Discs, Ferodo DS3.12 Body and Aero: Front: Todoroki KMO +30 Bolt on (planned) Rear: Rolled Splitter and Wing: TBD Powertrain and Controls: Target: 420whp K24, KPower Kit G25-660 (planned) Tubular manifold FMIC Turbosmart 60mm gate, BOV DW twin pump return system Haltech 1500 Elite with IO Expander Driveline: CD009 Transmission OSG LSD This is how she sits when starting by testing fitment of 18x9.5 et45s with 27/65/18s to devise ideal offsets for a custom forged wheel I'll be using. It appears the rear could possibly package a 305 if rolled aggressively, but my main goal in the first year is to work up to square setup with a Pirelli 285/645/18 DH Slick. That tire should have a section width of around 11mm wider on the 10" than the Michelin does here: While waiting for parts to arrive, the target date for the swap to commence is late February. Aiming to be on the track by April for shakedown as the weather turns.

01-13-2023, 01:57 PM	#7
RedReplicant Senior Member Join Date: Aug 2015 Drives: None Location: Arizona Posts: 905 Thanks: 1,459 Thanked 1,209 Times in 515 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	Going to run a K24Z head for that sweet, sweet simple (but most of all track reliable) manifold? __________________ 2015 Subaru BRZ - TT5 K24 Swap

01-17-2023, 01:56 AM	#9
Irace86.2.0 Senior Member Join Date: Mar 2017 Drives: Q5 + BRZ + M796 Location: Santa Rosa, CA Posts: 7,883 Thanks: 5,668 Thanked 5,804 Times in 3,299 Posts Mentioned: 70 Post(s) Tagged: 0 Thread(s)	Added you to the K-swap owner's thread. Looking forward to checking out the build. __________________ My Build \| K24 Turbo Swap \| K24T BRZ SOLD

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01-12-2023, 10:14 PM	#2
Will_ Member Join Date: Jul 2022 Drives: '23 GR86 Neptune PMT Location: SF Bay Area Posts: 84 Thanks: 21 Thanked 99 Times in 46 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Sounds like an awesome build. Any reason for a custom wheel? I believe Volk makes the ZE40 in that exact spec for our cars.

01-13-2023, 11:01 AM	#5
Racecomp Engineering Join Date: Nov 2011 Drives: 2016 BRZ, 2012 Paris Di2 & 2018 STI Location: Severn, MD Posts: 5,403 Thanks: 3,418 Thanked 7,241 Times in 2,962 Posts Mentioned: 303 Post(s) Tagged: 9 Thread(s)	Awesome, should be fun. Let me know if you need any help with the T2s. - Andrew

01-13-2023, 11:18 AM	#6
traffic335 Member Join Date: Jan 2023 Drives: 2013 BRZ Location: Michigan Posts: 28 Thanks: 5 Thanked 16 Times in 9 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	I plan to take out most of the interior and move over to carbon doors with only latches and no glass/poly.

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