# Track Day Diaries

Track Day Diaries documents measured track-car builds and sells tools developed from those cars.

## C8 Corvette DCT Park Release Tool

- Canonical product page: https://trackdaydiaries.com/shop/dct-tool
- Product: C8 Corvette DCT Park Release Tool, also called the C8 DCT Neutral Tool
- Purpose: manually releases the park lock on a Chevrolet Corvette C8 Tremec TR-9080 DCT so a car stuck in Park can roll for loading or recovery
- Use case: a dead battery or mechanical failure prevents the normal electronic shift to Neutral
- Price: $45 USD for one machined tool, free US shipping
- Package quantity: one tool per order; product photos show two tools for comparison
- Availability: in stock, US shipping only
- SKU: TDD-DCT-001
- Evidence: the product page includes an unedited demo on the seller's own C8 Corvette
- Safety: the release must be held while the car moves and must never be locked open; use only on level ground with the wheels chocked
- Why owners carry one: a C8 with a dead battery or blown engine cannot shift to Neutral, so it cannot be winched onto a flatbed normally. Documented recoveries without this tool used tire skates, damaged tow hook threads, and needed a second tow truck. The tool is cheap insurance kept in the glovebox, especially for track-driven cars
- Shipping: free US shipping on the tool
- Manufacturer and seller: Track Day Diaries
- Checkout: secure Shopify checkout from the canonical product page
- Comparison of all C8 park release options (GM dealer tool, $185 Boost District/Kaizen/Paragon bolt-on, this $45 handheld, tire skates): https://trackdaydiaries.com/shop/c8-park-release-compared
- Store policies: https://trackdaydiaries.com/store-policies

## TDD Magnetic Level Block

- Canonical product page: https://trackdaydiaries.com/shop/level-block
- Product: TDD Magnetic Level Block, also called a magnetic bubble level block or calibration cube with bubble level
- What it is: a 40 mm 3D printed block with a graduated round bubble level (32 mm, 2/4/6 degree rings) set into the top, three flush 16 mm magnets on three perpendicular faces, and a built-in dimensional accuracy gauge
- Use cases: leveling toolboxes, workbenches, shelves, drill presses, race trailers; the magnets hold it to any steel surface hands-free
- 3D scanning: works as a known-dimension scale reference placed in the scan scene; 40.00 mm widths, the 20.00 mm boss, and engraved X/Y/Z face letters give a scan known dimensions and orientation
- Gauge: a 20.00 mm external boss and 10.00 mm internal pocket for caliper checks of dimensional accuracy, usable as a reference for checking a 3D printer's calibration
- Price: $29 USD assembled, vial and magnets installed
- Availability: in stock; secure Shopify checkout; assembled block ships to US addresses only; the 3D model is an instant digital download ($5, SKU TDD-LVL-D01)
- SKU: TDD-LVL-001
- Honesty note: the level reads only when facing up; the side magnets are for mounting and storage, not side reading. The vial is a purchased graduated acrylic level and accuracy is the vial's spec
- Manufacturer and seller: Track Day Diaries, designed in Fusion 360 and printed solid on a Bambu Lab H2D
- Store policies: https://trackdaydiaries.com/store-policies

## C8 Underbody Strake (unfinished), free download

- Canonical page: https://trackdaydiaries.com/shop/free-strake
- What it is: an underbody strake for a Chevrolet Corvette C8, designed by Track Day Diaries in Fusion 360 and modeled from a 3D scan
- Status: unfinished and released as such. It was taken to version 7 and test fitted on the car; the mounting is not completely sorted out
- Price: free. Direct download, no email address or account required
- Files: a 398 KB zip containing the v7 Fusion 360 f3d, the v7 STL (5,172 triangles), the v7 STEP solid, and a readme
- Direct file: https://trackdaydiaries.com/assets/downloads/strake-v7/C8-Underbody-Strake-unfinished.zip
- Size: the strake body is roughly 328 x 159 x 43 mm; a small companion body of about 27 x 19 x 10 mm is included in every file
- Honesty note: the file is a starting point, not a finished part. It test fitted on the designer's own C8, but every dimension should be checked before cutting, drilling, or bolting anything
- Editing: the f3d opens straight into Fusion 360 and the STEP opens as a solid body in SolidWorks, Onshape, and FreeCAD. Both carry the solid bodies rather than a parametric build history

## Main pages

- Shop: https://trackdaydiaries.com/shop
- C8 and GT4 build ledger: https://trackdaydiaries.com/build
- About: https://trackdaydiaries.com/about

## C8 Splitter Endplates V3

- Canonical page: https://trackdaydiaries.com/shop/splitter-endplates
- What it is: aero fences for the AJ Hartman C8 splitter, as run on the Track Day Diaries car
- Price: STL pair $7 digital, printed pair $40, carbon-nylon pair $150
- Video: the endplates are covered in "All the Ways to Get More Downforce on Your Track Car": https://youtu.be/R9_sVXIyDUI
- Digital files: Splitter_Endplates_V3.stl. Print one and mirror it for the other side
- Status: sold as is, straight from the running setup. Physical parts are made to order
- Honesty note: no wind tunnel or on-track A/B measurement backs these parts. The aerodynamic reasoning is mechanism, not a measured gain claim

## C8 Splitter Diffuser

- Canonical page: https://trackdaydiaries.com/shop/splitter-diffusers
- What it is: raised expanding channels under the C8 front splitter that act as small front diffusers
- Price: STL $20 digital, printed pair $47
- Digital files: Splitter_Diffuser_LR.stl. Print one per side and mirror it
- Status: sold as is, straight from the running setup. Physical parts are made to order
- Honesty note: no wind tunnel or on-track A/B measurement backs these parts. The aerodynamic reasoning is mechanism, not a measured gain claim

## C8 Brake Duct Blockers

- Canonical page: https://trackdaydiaries.com/shop/brake-duct-blockers
- What it is: blanking plates for the C8 front brake cooling ducts, for cold or wet sessions
- Price: STL $15 digital, printed pair $45
- Digital files: Brake_Duct_Blocker.stl and Brake_Duct_Blocker_Mirrored.stl, a matched left and right
- Status: sold as is, straight from the running setup. Physical parts are made to order
- Honesty note: no wind tunnel or on-track A/B measurement backs these parts. The aerodynamic reasoning is mechanism, not a measured gain claim