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8 1/4″ 36-1 Trigger Wheel – No Slots

5 out of 5 based on 1 customer rating
(1 customer review )
8 1/4" 36-1 Trigger Wheel - No Slots



Add a crankshaft position sensor to your engine with our laser cut 36-1 crank trigger wheel. This trigger wheel is 8 1/4″ in diameter and 1/8″ thick, with a 1/2″ diameter center hole (with plenty of room to enlarge it for larger crank bolts). The teeth are 1/4″ high, so this fits crankshaft pulleys up to 7 3/4″ in diameter. It also has a balance hole in it for smooth rotation. We designed this wheel especially for older American engines, which often have very large crank pulleys.

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1 review for 8 1/4″ 36-1 Trigger Wheel – No Slots

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    What MegaSquirt versions does this trigger wheel work with?

    • MS1/Extra, MS2/Extra, MS2 Bowling & Grippo, and MS3 firmware all have support for the 36-1 pattern. Some of the traditional MegaSquirt versions may require hardware mods. “Pro” wire in systems like the MS3-Pro and MicroSquirt can use this with no internal ECU mods.

    What cylinder counts can this be used with?

    • MegaSquirt code supports using a 36-1 pattern for 1, 2, 3, 4, 6, 8, and 12 cylinder engines. The latest MS3 code is also capable of running this on 7 cylinder radial engines. 5 or 10 cylinder engines require a tooth count divisible by 5.

    Can this be used with a non-MegaSquirt ECU?

    • Many other ECUs support a 36-1 pattern, although we have not tested our trigger wheels or sensors with them. Consult your ECU documentation for details.

    How do I measure what size trigger wheel I need?

    Can this wheel be bored out to make a ring shaped trigger wheel?

    • Yes. We are not able to offer them pre machined, but this should be easy for a machine shop to carry out.

    Can trigger wheels be ordered in custom diameters or with mounting holes pre-drilled?

    • We are not able to deliver custom trigger wheels with a reasonable cost or turnaround time. Our current lineup can be adapted to most engines with some fabrication.

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