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Ramjet ECU upgrades are available for 350/502 crate engines.

MEFI 3 equipped models had no O2 sensor feed back for closed loop operation or air temperature compenstaion. These engines ran very rich, fuel fouling spark plugs and as a result poor fuel economy.

ASM offers calibration of the ECU to correct overly rich running condition on MEFI 3 ECU's and toggle on these features, and provide the O2 sensor upgrade.

On later model MEFI 4A ECU's with "high idle" or "stalling". conditions we can correct those problems, as well as over temperature RPM reduction.

Just fill out the Calibration Order form on the Home page and send the ECU with the information to the address shown on the Order Form.

Ramjet Upgrades Calibration$395.00
If you don't see what you're looking for please call or e-mail us.

Phone: (480) 753-0208 Fax: (480) 753-0216

Hours: 8am - 5pm M-F Mountain Standard Time