How to use Longacre Connect and Intercomp iRaceWeigh with a setup app

Last reviewed: November 13, 2026 · By the RaceYear team · Checked November 13, 2026

Short answer: Longacre Connect and Intercomp iRaceWeigh are excellent wireless scale indicator apps, not full race-night setup binders. Use Longacre or Intercomp in the shop to read live Bluetooth corner weights while you turn weight jacks, then log those final corner weights alongside your springs, shocks, bar angles, stagger and pyrometer tire temps inside RaceNight (or snap a photo of your RC scale readout in RacerRX).

Key takeaways

• Longacre Connect pairs via Bluetooth with Longacre Elite and Elite Pro wireless scales and Elite Load Sticks, exporting weight sessions as CSV files.
• Intercomp iRaceWeigh connects to Intercomp XBT Bluetooth scales, RFX wireless indicators (via Wi-Fi module) and Intercomp Digital Memory Air Pressure Gauges.
• Scale apps record weights (and pressures on Intercomp), while handling changes at the track depend on the rest of the sheet: ride heights, camber, caster, panhard bar, 4-link bars, shock clicks and track state.
• Pairing your scale app with RaceNight keeps weights, geometry and race results searchable in one offline binder.

What scale apps capture vs what a full setup binder captures

Capability	Longacre Connect	Intercomp iRaceWeigh	RaceNight Setup App
Hardware required	Longacre Elite / Elite Pro wireless pads or Load Sticks (has demo mode)	Intercomp XBT scales, RFX + Wi-Fi module, or manual entry	None (works with any wired or wireless scale brand)
Live Bluetooth pad streaming	Yes (Longacre hardware)	Yes (Intercomp hardware)	No (records final corner weights and percentages)
Tire pressure memory sync	No	Yes (with Intercomp Bluetooth memory gauge)	Logs cold/hot pressures, bleed settings and 12-spot tire temps
Full suspension geometry, bars & shocks	Notes field only	Notes field only	Structured class templates for springs, shocks, 4-link, J-bar, camber, caster and toe
Track conditions & AI Crew Chief	No	No	Logs surface moisture/groove and powers AI Crew Chief recommendations
Platforms	iOS and Android	iOS and Android	iOS and Android (100% offline in the pits)

A fast 4-step shop-to-track scaling workflow

1. Set tire pressures and level the pads first: Air all four tires to race pressure, verify pad level with shims or laser, put race fuel load in the cell and put driver weight in the seat. Read our full walkthrough on how to scale a race car.
2. Dial in cross-weight live on your scale app: Open Longacre Connect or Intercomp iRaceWeigh while turning jack bolts so you can watch LF, RF, LR, RR and cross-weight settle in real time. No Bluetooth pads? Plug your wired scale indicator numbers straight into our free corner weight and cross weight calculator.
3. Lock the baseline into RaceNight before loading the trailer: Enter your final corner weights, ride heights, spring rates, shock clicks and rear gear into RaceNight and save it as your shop baseline.
4. Log trackside changes offline between rounds: At the track, duplicate your baseline for Hot Laps, Heat and Feature. Record every half-turn of wedge, half-inch of stagger or click of rebound in seconds with zero cell signal so you always know how to get back to your shop baseline on Monday.

What about 4-corner RC scales?

If you scale 1/10 buggies, pan cars or dirt oval RC cars on a four-pad Bluetooth or LCD scale system (such as SkyRC or GForce), RacerRX includes a photo scale import: snap a picture of the four corner readouts on your pit mat and RacerRX fills the corner weights and percentages straight into your RC setup sheet.

Frequently asked questions

Can I use Intercomp iRaceWeigh without owning Bluetooth scales?

Yes, iRaceWeigh includes a manual entry mode for typing four corner weights, or you can use RaceYear’s free browser corner weight calculator with zero install or sign-up.

Why shouldn’t I just put my shock and bar specs in the scale app’s notes box?

Free-text notes cannot be filtered or compared cleanly across 30 race nights. Structured fields in RaceNight let you compare two setups field by field and let the AI Crew Chief spot patterns across tracks.

Does cross-weight use RF + LR or LF + RR?

Oval racers almost universally define cross-weight (wedge) as (RF + LR) divided by total weight. Road racers often track (LF + RR). Both RaceNight and our free corner weight calculator support oval cross-weight and rear bite (LR minus RR).

Sources

• Longacre Racing Products, checked November 13, 2026: Longacre Connect app, Elite Pro wireless scale systems, Elite Load Sticks and CSV export features.
• Intercomp Racing, checked November 13, 2026: iRaceWeigh mobile app, XBT Bluetooth scales, RFX wireless indicators and Digital Memory Air Pressure Gauge connectivity.