StromTuner
Stromberg CD Needle Tuner
$9.99 · Designed for iPad. Not verified for macOS.
Find, tune, and compare Zenith-Stromberg CD carburetor needles. Factory vehicle applications, dyno AFR log import, and richer/leaner tuning — all offline.
StromTuner is a needle-matching and dyno-tuning reference tool for Zenith-Stromberg CD carburetors — the 1½″ CD/CDS/CDSE needle family used across Triumph, MG, Volvo, Saab, Jaguar, Land Rover, Jensen-Healey, and more.
FIND
Enter the diameters you want at any of 13 stations and StromTuner ranks the 144 needles in its database by how closely they match, using total deviation or least-squares scoring.
TUNE
Start from a needle you already have. Pick a region — Idle, Low Cruise, Mid Cruise/Low Accel, Hi Cruise, Hi Accel, or the whole needle — and ask for richer or leaner. StromTuner finds needles that move that region in the direction you want while disturbing the rest of the profile as little as possible.
COMPARE
Overlay up to four needles at once on a diameter chart and a flow-area chart (the actual open gap between needle and jet — what fuel flow is really proportional to), normalized at idle so shapes are directly comparable.
APPLICATIONS
39 factory vehicle applications across seven marques, cross-checked against parts catalogs, factory manuals, and marque specialists, with standard needle codes linked straight to the matching needle data.
DYNO LOG IMPORT
Import a CSV AFR log from your dyno session — keep multiple named runs per needle, see each reading plotted against the needle's own station chart, and set target AFR bands per zone to spot at a glance which region is running rich or lean.
StromTuner works fully offline. No accounts, no ads, no tracking, no network access at all — your needle data and AFR logs never leave your device.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Skunk River Restorations, LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Skunk River Restorations, LLC
- Size
- 4.7 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Skunk River Restorations
