- Tue Mar 23, 2021 3:02 pm
#49253
So for that I need to use 2 wires (inj 1 (1/2 + 2/2)) to use 4 injector in sequential mode?
jonbill wrote: ↑Tue Mar 23, 2021 3:42 pm you need 4 injector channels to run sequential on a 4 cylinder engine.Nice! Thanks a lot, now I understand.
Speeduino offers a pair of wires per channel to carry more current. It's up to you whether you choose to use one or two wires per channel on the IDE cable and connectors, but either way, the same signal is on both.
PSIG wrote: ↑Sun Jan 31, 2021 4:11 pmI use a TBI setup in this engine with very good results. The siamese port 250 inline 6 cylinder used in the Opala seems to "like" using setups similar to carburetors (i.e. throttle body injection). In my case it is a Holley #502-7 2-barrel unit and MS2Extra ECU. Now I'm testing a different TB unit and speeduino ECU.alecpicanco wrote: ↑Sun Jan 31, 2021 6:00 am...It uses a inline six cylinders and those Siamese heads. Many mechanics say that the hit is only good if the injection is sequential.This assumption is not entirely correct. In-fact, the opposite is mostly true, that most forms of fueling are even, except un-timed single-squirt port injection. Siamese ports are unique for fuel distribution, but are generally consistent in their charge-stealing (cross-fueling). A good understanding of the odd flow dynamics is required, and there are web references for testing data. Constant-flow injection, carburetors, TBI, multi-injection semi-sequential port, and sequential can all fuel evenly when set-up properly.
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