Zipper’s Thunderbolt Nosecone Ignition Module by Twin Tec

The Thunderbolt nosecone internal ignition is designed to fit all ’84-’99 Evolution® Big Twin and ’86-’03 Sportster® models, as well as ‘70-’84 Shovelhead and ‘71-’85 Iron XL’s. It is fully contained within the cam cover, replacing the externally mounted module on all models originally equipped with electronic ignitions. It features external switches that control single or dual fire operation, multi-spark function, advance curve selection and RPM limit. LED indicators assist static timing set up and VOES switch activation (the use of a V.O.E.S. switch is strongly recommended; without vacuum advance at idle and part throttle, thermodynamic efficiency is reduced and engine temperatures increase significantly). Designed for use with 3.0 ohm coils; 1 year warranty.

The Thunderbolt is also programmable with a laptop or standard PC. Software and an interface cable are required for connection between the tach port and the computer USB port (purchase separately). Advanced tuners will be able to program a custom advance curve; you can also adjust rear cylinder timing offset, as well as set initial timing and RPM limits though the software. An exclusive feature is the ability to set the system up to delay the ignition fire (from 0 to 3 revolutions) to aid starting of large displacement or high compression engines. Engines equipped with nitrous or a turbo can configure the VOES input port to be used as a retard switch input instead, with up to 10° timing retard.

We offer a version pre-programmed without any rotational delay for kick-start models (317-105K).

This product is not legal for use on pollution-controlled vehicles.  In compliance with ARB emissions laws, this product is not sold or shipped to California.