Eric said:
May as well try it the other way around if you havent all ready.
It's running but not very well and it's hard coding the cam sync in the Gen7.
I'm going round and round with Accel and Edist manufactures trying to figure this out.
(in review,
Accel Gen7 ECU,
FAST Edist distributorless with LS1 coils,
Ford Explorer cam sync sensor, (hall effect??)
Moroso magnetic crank sensor.)
The initial problems I see with this whole setup is the fact that the Edist and the ECU are sharing the cam sync signal.
Before I went this route I asked Accel, FAST Edist, and my local Dyno guy (that sells them both) if it was possible to use these 2 components together and to share the cam sync signal. They all said yes.
This cam sync signal sharing means 2 things though, first there's a voltage drop. While cranking I'm getting about 0 to 10 volts at the ECU with the Edist disconnected. With the Edist connected I'm getting 0 to 8 volts. No scope so I can't get a running measurement.
Secondly there's a timing issue. The optimum cam sync timing for the ECU is 45 deg BTDC, the optimum for the Edist is 60 deg. Both have a window of variance that is acceptable but these windows don't overlap very much. That and I don't have any way to time the cam sync dynamically, am now timing it statically with the Fluke. Is this done with a scope? I have been able to time the crank sensor with a timing light, so I know that's correct.
Now I'm getting conflicting information about what type of sensor the Ford unit really is. While first agreeing that it was a hall effect sensor, Accel is now saying it's a IPU (magnetic) sensor. Inspecting the sensor I do see that it has a magnetic pickup, but can a hall effect sensor be magnetic? I don't think it is an IPU sensor though, because when I changed it to this in the Edist configurations it won't fire at all.
The Gen7 has 3 choices in the software for cam sync sensor type, IPU (magnetic), hall effect, and 5V sq wave. And it runs on all 3 and codes the cam sync sensor on all 3.
the Edist has 2 choices, hall effect and magnetic, and it only runs on hall effect.
I'm about to construct a double cam sync sensor, with 2 cam sync sensors that are separately timeable. This would solve both the timing and voltage issues. I'm going to try one other thing though and that's set the cam sync to rising edge, although I seem to remember someone saying falling edge was better/more accurate. Don't know what else to do at this point other than try another cam sync sensor although Ford wants $200 and I suspect this type sensor either works or it doesn't.
On a side note the initial maps generated by the Gen 7 software were way rich for the 8 stack. Accel sent me another map they had for an 8 stack 402 and it's way leaner until full throttle.