Test & Tune
⚠️ This listing hasn’t been confirmed by the organizer yet — details may change. Confirm with the source ↗.
🎟️ Going to this one?
Free members get show-prep discount codes from our partner shops — JS Ultimate Sounds and JS Alternators — plus alerts when new shows are added near you.
When
📅 Thursday, August 20, 2026
5:00 PM
Organizer
About
During test & tune days, licensed racing drivers with certain classes of racecar can take full advantage of Lime Rock Park’s road circuit.
Gear for this build
In stock at our partner shops — real prices, shipped from people who run this stuff.
JS Alternators
JS Alternators High-Output Alternator
250A–400A+ hand-built in the USA. Find the fit for your year/make/model.
Shop →
Sundown Audio
Sundown SA150-975L Super-Cap Battery
What a capacitor pretends to do — real stored energy for voltage sag.
Shop →
Sundown Audio
Sundown Full Tilt 50' 1/0 AWG Cable
50 ft of 1/0 AWG power/ground — the gauge most big-three upgrades call for.
Shop →
Stealth Energy
American Bass Stealth ST-750 75Ah AGM
75Ah AGM — deep reserve for high-draw audio and dual-battery setups.
Shop →
JS Ultimate Sounds and JS Alternators are run by the ShowUp team — buying there supports the site. Prices as listed at the shop.