Ramjet 350/502
58mm ZZ502 Ramjet Throttle Valve
58mm ZZ502 Ramjet Throttle Valve $450.00
$450.00Add to cart
58mm ZZ502 Ramjet Throttle Valve
58mm ZZ502 Ramjet Throttle ValveDyno Testing of the stock ZZ502 Ramjet crate engine has proven to make much less power than advertised 502HP. The throttle valve that comes on the engine is a twin blade 48MM which is the same size originally used on the 305″ TPI engine in 1986.
Ramjet ECU Upgrade for 305/502 crate engines
Ramjet ECU Upgrade for 305/502 crate engines $395.00
$395.00Add to cart
Ramjet ECU Upgrade for 305/502 crate engines
Ramjet ECU Upgrade for 305/502 crate enginesMEFI 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.
