I was talking to someone on another board and they had this idea. I was wondering if anyone had any direction to start something like this or if someone already did it and there are schematics around somewhere? This is for a GTP. Well here's what he wrote:
I want some way to add timing when the [alcohol] pump is going. My first plan was to spray onto an IAT sensor, and the use the air temp spark table to add timing that way taking advantage of the instantaneous temp drop. Problem here was the response time of the sensor isn't fast enough. So, my new idea is to somehow create a circuit with variable resistance based on the pump voltage. The circuit will connect to the IAT sensor (in the spirit of a happy knob), and through the air temp spark tables I could add say 2* at the resistance corresponding to 5 volts to the pump, 4* at the resistance corresponding to 12 volts to the pump, etc...
Any direction would be appreciated.
I want some way to add timing when the [alcohol] pump is going. My first plan was to spray onto an IAT sensor, and the use the air temp spark table to add timing that way taking advantage of the instantaneous temp drop. Problem here was the response time of the sensor isn't fast enough. So, my new idea is to somehow create a circuit with variable resistance based on the pump voltage. The circuit will connect to the IAT sensor (in the spirit of a happy knob), and through the air temp spark tables I could add say 2* at the resistance corresponding to 5 volts to the pump, 4* at the resistance corresponding to 12 volts to the pump, etc...
Any direction would be appreciated.