Dr.Jeff
True Classic
Thanks Paul, I'm looking forward to it.
A couple of companies (AEM being one) are making distributor located trigger units for standalone ECU's. Basically the top half of a stock distributor is cut off and a custom designed 'head' replaces it. The head has trigger wheels and sensors to offer the input signals. One representative used the following statement to describe it's advantage to using the stock hall-effect trigger in the stock distributor: "it replaces a analog sensor with a digital one". Frankly that statement does not make sense to me, I think it was marketing hype. But maybe the advantage of building this type set-up is what you said about hall-sensors needing some width on the trigger? And/or perhaps the two wheels/sensors located there are a big advantage (although I'm not clear why 2 are needed from the same drive source)?
Edit: It occurred to me the advantage to this over the stock hall trigger in the distributor might be that the new wheels have a greater number of teeth (compared to the 4 on the stock ignition), for greater precision?
Here is the one from AEM: http://www.aemelectronics.com/?q=products/ignition-components/engine-position-module-epm
A couple of companies (AEM being one) are making distributor located trigger units for standalone ECU's. Basically the top half of a stock distributor is cut off and a custom designed 'head' replaces it. The head has trigger wheels and sensors to offer the input signals. One representative used the following statement to describe it's advantage to using the stock hall-effect trigger in the stock distributor: "it replaces a analog sensor with a digital one". Frankly that statement does not make sense to me, I think it was marketing hype. But maybe the advantage of building this type set-up is what you said about hall-sensors needing some width on the trigger? And/or perhaps the two wheels/sensors located there are a big advantage (although I'm not clear why 2 are needed from the same drive source)?
Edit: It occurred to me the advantage to this over the stock hall trigger in the distributor might be that the new wheels have a greater number of teeth (compared to the 4 on the stock ignition), for greater precision?
Here is the one from AEM: http://www.aemelectronics.com/?q=products/ignition-components/engine-position-module-epm