Hey guys,

was wondering if there were any benefits from using to seperate ignition and DFI systems on an engine. Does it make sense?

Tricking a computer to think it is on a 4 cylinder and just have 2 computers, one for each bank.

What do you think? Is it just a waste of money?

thanks for your input

Alot more work then I see as being necessary.

If you alternate firing each bank of cylinders to every other crank revolution, and make it a true bank to bank system you can get an extra 5% effective Duty Cycle out of the injectors.

But, if you're using large injectors that might work against you.

I was thinking there would be some benefit but not really sure what it would be.

I am planning a twin turbo engine and was thinking of having a seperate intake for each bank. I think would might run into problems with unequal boost on each bank though. I am thinking of using somehting around 50 lb injectors, although I really want to try using two injectors per a cylinder. maybe a 24 lb anf switch to the larger injectors for racing. I was also thinking of using two systems for this setup, what do you think?

On the ZR1, or what ever the label was for the OHC Lotus engines, they used a vac solenoid to open the High Load Butterfly, and turned on a second set of injectors, when the butterfly opened.

Staging things, makes for 3-4x the work, from what I've seen.

Why not a couple of balance tubes?.
For boosted engines the current trend is for really large plenums.

I've run 40s-55s, and 60 PPH injectors in my lil 231 CID engine just fine.

how do the larger injectors affect your idle?


I did not know that about the zr1. Thats cool.