MAXXECU RACE

Hello everyone. if you have an engine that runs at 10.000 rpm what teethcount on trigger wheel is best for MAXXECU .Also, do you have any hall sensor recommendations for such cases?

Thanks..!

What size is the trigger wheel? A larger diameter allows for more teeth to be used.

The diameter is 135mm. the teethcount is 60-2..its a new project on the engine and i am beginner at programing ecu and your experience and kind help would be the best for me. iam afraid there will be no failure after 7000 rpm ++ with missfire or super nock.

thanks..!https://photos.app.goo.gl/HG78xd9Qo31MHnL59

It doesn't particularly matter so long as runout and tooth spacing isn't weird or inconsistent. Consistently run to 11k on a Maxx using a myriad of diameter wheels in 36-1 configs.

thanks David!!

Be aware with a high tooth count missing tooth wheel using a VR sensor at high RPM, the design of the trigger wheel, especially the "missing tooth gap" is quite important to keep the voltage of the teeth before and after the gap within an acceptable limit. Maxx is quite sensitive to that situation as they have quite a low clamp voltage on the trigger inputs. I had a lot of trouble making a BMW motorcycle engine work reliably with maxx due to the factory 60-2 design that was machined into the crank.

For the best chance of success, make sure the missing tooth gap design is similar to the common Toyota/Mazda/Subaru design shown below. The tip of the teeth should ideally be about the same size as the magnetic pole diameter inside the sensor, and the spaces between teeth should be at least bigger than the sensor pole diameter (larger space is better). 36-2 is generally my go to option if Im making something myself as it is less sensitive to design and in my crude testing over the years with various different ECU's and trigger wheels I havent seen a noticeable difference in timing drift between 36-2 and 60-2. I've never personally tested the same engine and same ecu back to back with 36-2 Vs 60-2 so that may be a subjective observation.

Hi Adam,

Thank you so much for your detailed and insightful reply regarding the trigger wheel design.Your explanation helped me better understand how the missing tooth gap affects signal clarity and why this matters when using a Hall sensor with MaxxECU at high RPM.

I really appreciate the time you took to respond — it's been incredibly helpful for my project.

Cheers from Greece!

– Michail

Since you mentioned hall effect in your last post, I wanted to clarify all my comments above were related to a VR sensor, as this would typically be the most suitable for a small diameter 60-2 wheel. Most of my comment dont apply to hall effect sensors, they typically need a full depth cut out for the missing teeth and usually much larger teeth on the wheel.

ok Adam..Thank you for the clarification!!