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Rob Stevens wrote:I guess you would need an S120 with 12 injector drivers for twin injector sequential with blending

I might have a prototype on my desk.

Alex DTA wrote:

Rob Stevens wrote:I guess you would need an S120 with 12 injector drivers for twin injector sequential with blending

I might have a prototype on my desk.

In this case...probably for peak and hold injectors..

Alex DTA wrote:

rocar wrote:Assume Sequential Injection needs to stay active

Not with that wiring. That's semi-sequential injection with the secondaries able to be blended in.

If you want sequential injection, you can't blend the second set.

Which do you want?

I have to run 12 injector ,I used to run sequential but both Cyl injectors connected together. Now I would like to separate, so I think my options are or semi sequential or batch. So Sequential active will run Semi Sequential and if turned off they will run as a batch If I'm understanding good

By default batch is semi sequential, unless you wire all injectors to one output,

ALthough the transition may not be smooth ?

If it was wired as a conventional 6 cylinder, 1 inj per cylinder full sequential as normal ( and also second set triggers wired the same )....but the 12v removed to the secondary injectors, and then applied on load. The secondary injectors could be wired to the primary outputs and run sequentially on load.

I guess if that threshold where the secondary's are brought online was controlled by an Aux out at a preset MAP/RPM level, it might make mapping the fueling easier ?
As fueling would need to be cut in half at that point.

Or use that same Aux channel to immediately cut 50% of fueling ?

It's still allow the car to drive and idle etc on one set of injectors, and say at 3000rpm or something run both injectors before any actual load is applied so the transition would not affect racing ?

Too complicated!!!!!

Rob Stevens wrote:Too complicated!!!!!

it's incredibly simple.

12v off or on over 3k, and at that same point immediately cut fuel by 50% ( assuming same size injectors, but same trends would apply )

No messy wiring, one relay, almost no fuel tuning required.

Wired and tested today ...
No 1 wired as Alex said but it's not good as OP4 / pin 25 is primary , OP 5/6/7/8 are secondaries
No 2 Problem is that they do not work all 12 injectors, as target is reached they just swap from primary to secondary .
I tried switching twin injector at 3000 rpm . So below 3000 rpm 6 primary are on and secondary off , above 3000 rpm ,Primary switch off and secondary goes on
I think something is wrong as it does not make any sense.

rocar wrote:Wired and tested today ...
No 1 wired as Alex said but it's not good as OP4 / pin 25 is primary , OP 5/6/7/8 are secondaries
No 2 Problem is that they do not work all 12 injectors, as target is reached they just swap from primary to secondary .
I tried switching twin injector at 3000 rpm . So below 3000 rpm 6 primary are on and secondary off , above 3000 rpm ,Primary switch off and secondary goes on
I think something is wrong as it does not make any sense.

Use the blend table for any transition from primary to secondary.

ie 0% in the blend table will be 100% the primaries

and 100% in the blend table would be 100% secondaries


50% would share load equally between injectors.

What firmware version are you on?