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Spearmint Dyno — Tuning & Performance

Chassis Dyno • Custom Tuning • Holley EFI

Real horsepower, proven on the dyno.

Santa Paula, CA — serving Ventura County & the805. From baseline pulls to full custom tunes, we find the power your build is leaving on the table.

Horsepower and torque dyno curves2k4k5.5k7k RPM500300150HORSEPOWERTORQUE

What we do

Services

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.

starting at $450Details →

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.

starting at $750Details →

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.

starting at $350Details →

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.

starting at $300Details →

Recent pulls

Numbers don't lie

'67 Camaro — LS3 Swap

Holley Terminator X, longtubes, cam

Baseline

412 whp

Tuned

468 whp

+56 whp on the dyno

'02 Silverado 1500 — 5.3L

Stock ECU, intake + exhaust

Baseline

271 whp

Tuned

305 whp

+34 whp on the dyno

'70 Chevelle — 454 Stroker

Carb, big-block, pump gas

Baseline

489 whp

Tuned

543 whp

+54 whp on the dyno