Running 8 Injectors

[WDRacing]

I have 4 42lb injectors currently installed, I do however have a second Aeromotive rail and another 4 42lb injectors I'd like to install. Any reason I can't tap the existing signal from the stock ecu and power the additional 4 injectors. Lets assume I'm able to control the fuel flow with my SAFC just for the purpose of this thread. I want the extra fuel because I'm using E85 from now on and it needs an additional 20% fuel just to be stoich.

Thoughts?

WD

[KATwo40]

You can do that, WD, so long as the SAFC has enough correction in it. Since you're running 104 octane, you probably won't suffer any ill-effects from the advanced timing values.

My only concern would be voltage drop across the injectors, being on the same circuit as the others.

[S13FX]

I just thought of a crazy idea why not use an emanage blue to control the extra 4 injectors? Nothing else just the injectors. I mean you can pick up a Blue one for like 250 bucks.

[WDRacing]

Because I have the SAFCII and MSD BTM right now. I'd rather atleast attempt to use what I have. If it doesn't work I'm not buying a piggyback, I'll probably just get a standalone. I still like the SDS. Maybe I'll jump on the rom tuning wagon I dunno.

What kind of voltage drop are we talking about here? Is it enough to effect the firing of the injectors? I don't care if the voltage drops so long as they still open, I can deal with anything else that pops up.

WD

[LEMHEAD16]

Megasquirt FTW!

[WDRacing]

I already have the SAFCII bro...so I'm starting there. I haven't been talked into MS yet. But I haven't read up on it to much either. Although I'm not into building my own board.

There should be a MS thread to discuss it and all its options. I asked for help awhile back on this, but no one did crap.

WD

[Swedish Mike]

I would use bigger injectors instead, fragile to run 8 injectors. One gone and a melted piston.

[PapaSmurf2k3]

I think it would work. "In theory", your voltage would'nt drop, but your amperage to each injector would. C'mon Brian, I thought you were the type to do it first/ ask questions later. If all els fails, it should be totally reversable.

[WDRacing]

I think it would work. "In theory", your voltage would'nt drop, but your amperage to each injector would. C'mon Brian, I thought you were the type to do it first/ ask questions later. If all els fails, it should be totally reversable.

Oh its gonna be a go...don't you worry about that. I might not even be the first.

I would use bigger injectors instead, fragile to run 8 injectors. One gone and a melted piston.

Well that same thing could be said for any of the primary 4. That why I have a knock meter and alarm. Losing an injector anytime means bad things for that cylinder, with or without added injectors.

WD

[Swedish Mike]

Oh its gonna be a go...don't you worry about that. I might not even be the first.

Well that same thing could be said for any of the primary 4. That why I have a knock meter and alarm. Losing an injector anytime means bad things for that cylinder, with or without added injectors.

WD

True but 8 is twice the risk.

[WDRacing]

You find out about me quick Mike, I do everything ALL the way . I'm the guy who usually just does it to see what will happen

[PapaSmurf2k3]

True but 8 is twice the risk.

if its on the same circuit the injector itself would have to completely fail 100% during boost for him to loose a piston...

[PapaSmurf2k3]

I'm the guy who usually just does it to see what will happen

see thats what I was talking about!

[Swedish Mike]

You find out about me quick Mike, I do everything ALL the way . I'm the guy who usually just does it to see what will happen

Haha, yeah, you have to risk some to win some!

[KATwo40]

I'm certain the voltage drop wouldn't be enough to prevent either injector from opening. I'd say go for it.

[WDRacing]

Definitly going for it, when I pick up my next motor, I'll start on the intake mani. I'd really just like to weld up a whole new one, runners and all but...I dunno. We'll see how things go.

WD

[PapaSmurf2k3]

Keep us posted.