[FoxbodyTX]

Hello will the Speeduino work with my 89 Mustang 5.0 with 8 injectors? does the speeduino only have 4 injector connections?
Thanks.

[FoxbodyTX]

How do we set the firing order so the system knows the injector order?

[FoxbodyTX]

Ok i see now that you have to account for it in the wiring and it just goes 1234, etc , But does the Speeduino use mass air flow signals?

[FoxbodyTX]

Never mind i see it does not support Mas Air Flow

[PSIG]

Ha! I see you answered your own questions , and yes, Speeduino can do semi and quasi sequential above 4 cylinders for faster change-response and even fueling. No, it does not use MAF signals, and we typically prefer MAP/SD for several reasons. Most converting from MAF simply delete the MAF unit to simplify and improve the induction, but it can be left in-place for appearances if preferred. As MAP/SD is fully tunable with corrections in this system, there is no advantage to hot-wire MAF. Did you want to keep MAF for some reason?

[FoxbodyTX]

PSIG , thanks so much for responding , i dont need the mass Air , can i connect directly to the ford distributor hall effect signal to control my spark and injector firing? do i need to try to grab a cam signal somewhere?

[FoxbodyTX]

Ha! I see you answered your own questions , and yes, Speeduino can do semi and quasi sequential above 4 cylinders for faster change-response and even fueling. No, it does not use MAF signals, and we typically prefer MAP/SD for several reasons. Most converting from MAF simply delete the MAF unit to simplify and improve the induction, but it can be left in-place for appearances if preferred. As MAP/SD is fully tunable with corrections in this system, there is no advantage to hot-wire MAF. Did you want to keep MAF for some reason?

Thanks i asked a few questin on the top post, thanks so much for responding to me.

[FoxbodyTX]

Ha! I see you answered your own questions , and yes, Speeduino can do semi and quasi sequential above 4 cylinders for faster change-response and even fueling. No, it does not use MAF signals, and we typically prefer MAP/SD for several reasons. Most converting from MAF simply delete the MAF unit to simplify and improve the induction, but it can be left in-place for appearances if preferred. As MAP/SD is fully tunable with corrections in this system, there is no advantage to hot-wire MAF. Did you want to keep MAF for some reason?

Since two injectors are on the same channel, how does the system know not to squirt into the other cylinder at the same time?

[FoxbodyTX]

Oh i see that using the ford firing order each firing is 90 degress apart so the 2 cylinder on the powerstroke 360 degrees apart are getting fuel and spark at the same time.

[PSIG]

Yes, to minimize the number of injections for equal fuel distribution, a cycle (cam) signal is helpful. I'm not sure if an Explorer V8 damper with 36-1 crank trigger wheel would have correct spacing to replace your damper (or mod yours for the wheel), but would be an easy option to use that. With a crank trigger, you could then either modify your distributor for cam signal, or use the Explorer cam sensor to replace your distributor and use coil packs, CNP, or COPs.

There are other creative ways to get a cam signal. Semi-sequential using the Ford TFI distributor is not yet here, but there are one or two here working on it recently.