User wants to optimize ignition timing curve on a Chevy 350 HEI distributor for max fuel economy and power but is unsure how to modify or what parts to buy.

No clear guidance or purpose-built tool to determine the current advance curve and modify the mechanical/vacuum advance on an HEI distributor; user must rely on manual testing and guesswork.

Severity

3Medium

Willingness to Pay

implied

Added

May 27, 2026

App Concept

AdvanceCurve Pro

A mobile app and hardware kit that measures your distributor's mechanical and vacuum advance curve in real-time using a Bluetooth timing light and RPM sensor. It overlays the measured curve against ideal targets, then recommends specific spring, bushing, or limiter changes. Includes a step-by-step modification guide and part lookup for aftermarket components.

Key Features

Real-time curve graphing with Bluetooth timing light
Database of stock and ideal advance curves for common engines
Interactive recommendations for spring/bushing changes
Direct part ordering links for tune-up kits

Target Users: DIY car enthusiasts and small auto repair shops working on older vehicles (pre-OBDII), especially those retrofitting or tuning carbureted engines for performance or fuel economy.

Revenue Model: $79 one-time hardware kit (Bluetooth adapter + sensor) + $4.99/mo subscription for curve database and advanced recommendations, or $14.99/mo pro tier with unlimited engine profiles.

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