Wroom
June 26th, 2008, 03:03 PM
I had a thought on saving some pins on an installation of an SM4 controlling a V8. Why not drive the injectors in pairs? A.k.a siamese injection.
If, on a V8 with firing order 1-3-7-2-6-5-4-8, the injectors where wired together like 1+3, 7+2, 6+5 and 4+8, then Injector outputs 5-8 on the SM4 would be free for other use. That's very good, since Inj6-8 can also be used as inputs.
The injectors are 11 Ohm saturated Bosch, so there should be no problem driving them in pair.
That would effectively mean that every second injector is driven 90 degrees earlier. I can't see how that could cause any problems.
Seems like a good strategy. Anyone here that have used siamese injection?
Any opinions or hints about this is much appreciated.
If, on a V8 with firing order 1-3-7-2-6-5-4-8, the injectors where wired together like 1+3, 7+2, 6+5 and 4+8, then Injector outputs 5-8 on the SM4 would be free for other use. That's very good, since Inj6-8 can also be used as inputs.
The injectors are 11 Ohm saturated Bosch, so there should be no problem driving them in pair.
That would effectively mean that every second injector is driven 90 degrees earlier. I can't see how that could cause any problems.
Seems like a good strategy. Anyone here that have used siamese injection?
Any opinions or hints about this is much appreciated.