well now that the V8-S10 is up and running I have focused back on my fairlane (has been sitting for over a year pretty much) I am looking to turbo the CrossFlow 250 I have at some point in time (already have the turbo and wastegate) but need a better controller for the EFI then the factory EEC4 setup.
I have been brainstorming about using a GM OBDII box as used in the Vortec Gen 1 trucks and vans (since I have a pile of them laying around from my truck build along withthe tuning software/hardware and misc bits)
The way the system works is there is a 3 tooth reluctor on the crank that fires the coil and provides the timing input to the ECU. this wheel mounts between the balancer and the tiing set (balancer must be trimmed down the thickness of the reluctor to maintain accessory alignment) The cam sensor is a "1" tooth reluctor setup that simply provides the needed info for firing order (IE first 3 cyls or last 3 in the two rev cycle) It uses a basic common GM temp sensor and MAP sensor along with TPS and all that. The MAF is used for idle mixture and some of the closed loop operation. it can be tuned out for a speed density tune but you then loose the ability for the ECU to follow a good set of tables if you change anything.
It may be possible to convert a EEC4 distributor to work with this (as they both use a similar Hall Effect sensor) which would make this much simpler. The stock GM unit is a plastic body with crap style cap and remote coil that is fired off a coil driver of its own.
So the plan right now is to see about fitting the crank reluctor to the XFlow motor and timing cover and then blending two distributors into one (IE a ford shaft and bas with a chevy top half and shaft) the big issue I am seeing is fitting the crank sensor behind the stock balancer as there is not alot of room there the way ford packaged everything. I have a spare XFlow block I will be mocking this all up on. so far it looks like the reluctor will fit the crank ok but I need to find out the location of the keyway (IE are the both straight up at TBC?) so I can figure out where to locat the sensor. I might have to cut a new keyway on the reluctor and rotate it around so I cna mount the sensor in the top of the timing cover (it is just a sleeve and hold down bolt....Hello JBWeld)
I have been brainstorming about using a GM OBDII box as used in the Vortec Gen 1 trucks and vans (since I have a pile of them laying around from my truck build along withthe tuning software/hardware and misc bits)
The way the system works is there is a 3 tooth reluctor on the crank that fires the coil and provides the timing input to the ECU. this wheel mounts between the balancer and the tiing set (balancer must be trimmed down the thickness of the reluctor to maintain accessory alignment) The cam sensor is a "1" tooth reluctor setup that simply provides the needed info for firing order (IE first 3 cyls or last 3 in the two rev cycle) It uses a basic common GM temp sensor and MAP sensor along with TPS and all that. The MAF is used for idle mixture and some of the closed loop operation. it can be tuned out for a speed density tune but you then loose the ability for the ECU to follow a good set of tables if you change anything.
It may be possible to convert a EEC4 distributor to work with this (as they both use a similar Hall Effect sensor) which would make this much simpler. The stock GM unit is a plastic body with crap style cap and remote coil that is fired off a coil driver of its own.
So the plan right now is to see about fitting the crank reluctor to the XFlow motor and timing cover and then blending two distributors into one (IE a ford shaft and bas with a chevy top half and shaft) the big issue I am seeing is fitting the crank sensor behind the stock balancer as there is not alot of room there the way ford packaged everything. I have a spare XFlow block I will be mocking this all up on. so far it looks like the reluctor will fit the crank ok but I need to find out the location of the keyway (IE are the both straight up at TBC?) so I can figure out where to locat the sensor. I might have to cut a new keyway on the reluctor and rotate it around so I cna mount the sensor in the top of the timing cover (it is just a sleeve and hold down bolt....Hello JBWeld)