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1985 GM small block TPI LB9 305cid 5L, replacing the failed batch-fire ECU with a Haltech Elite750 with 6 injector outputs. If I change the setup to semi-sequential what is the cylinder number pairing, and what modifications/addition to sensors and wiring loom may be required. Alternatively is it advisable to just leave it a batch-fire setup.
If it has the most common 18436572, you pair 1&6, 8&5, 4&7, 3&2. The very late SBC engines (can't recall year/CID) swap 4&7 firing (the camshafts are also different), but it doesn't affect the semi-sequential.
In context, I believe "batch fire" is synonymous with "semi-sequential".
Ta, Dom, bit of a typo there, got distracted checking correct spelling of synonymous...
Fixed, Dom, thanks for spotting it.
