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Spearmint Dyno — Tuning & Performance

Services

Dyno tuning & performance services

Every service ends with verified numbers on the dyno. Pricing below is a starting point — every build is different, so reach out for an exact quote.

starting at $450

Dyno Tuning & Baseline Pulls

Chassis dyno pulls on our in-house dyno — baseline runs to see where you are, then custom tuning to move the number. Every session ends with a printed graph.

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What's included

  • Baseline dyno pulls
  • Custom fuel & timing calibration
  • Data logging & analysis
  • Before/after dyno graph

starting at $450

starting at $750

Holley EFI / Standalone ECU Tuning

Holley EFI is our specialty — Terminator X, Dominator, and HP systems on classic muscle and LS swaps. We build clean base maps and tune them on the dyno.

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What's included

  • Base map setup
  • Idle & part-throttle tuning
  • Wide-open-throttle pulls
  • Boost / nitrous calibration

starting at $750

starting at $350

Carb Tuning & Classic Muscle

Carbureted classics tuned the old way and verified on the dyno — jetting, timing, and curb idle dialed in for pump gas and real drivability.

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What's included

  • Carburetor jetting & metering
  • Ignition timing curve
  • Idle & transition tuning
  • Drivability verification

starting at $350

starting at $300

Performance Builds & Diagnostics

Stroker builds, cam swaps, forced induction, and the diagnostics to figure out why it isn't making power. From bench to dyno.

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What's included

  • Engine build consultation
  • Stroker / cam / induction setups
  • Misfire & no-power diagnostics
  • Pre- and post-build dyno verification

starting at $300

FAQ

Common questions

What should I bring to a dyno session?
Bring the car in good running order: fresh oil, no active leaks, correct tire pressure, and at least a half tank of the fuel you'll actually run. If you have a specific goal (track day, E85, boost), tell us ahead of time so we can plan the session.
How long does a dyno session take?
A baseline pull session is usually 1–2 hours. A full custom tune — especially on a standalone ECU like Holley — can run half a day to a full day depending on the setup and how many revisions it needs.
Do you tune AWD or just 2WD?
Our chassis dyno handles 2WD (rear- and front-wheel drive). AWD vehicles may require a linked dyno — contact us with your drivetrain and we'll confirm whether we can accommodate it before you book.
Do you tune E85 / flex fuel?
Yes. We tune pump gas, E85, and flex-fuel setups. Bring the fuel you intend to run, and let us know if you're running a flex-fuel sensor so we can calibrate the blend tables correctly.
Can you tune my Holley Terminator X LS swap?
That's our specialty. We build clean base maps for Terminator X, Dominator, and HP systems and tune them on the dyno for idle, part-throttle, and wide-open-throttle.
Will tuning void my warranty or hurt reliability?
We tune for safe, real-world power and verify with data logging. Any aftermarket calibration can affect a factory warranty — we'll walk you through the trade-offs before we touch anything.