Im looking to pick my injectors that im going to run on my twin turbo project. Im looking at accel 44lb/hour but there only 12 ohms. The 36lb/hr are 14.4 oms....What ones should I go with. Is an actual 749 better than a 730. I know the injector drivers are different and the 749 has an extra driver. Is that better for a turbo setup?

 

12 vs 14 ohm isn't a significant difference -- both are still high-Z.

As far as the '730 vs. '749 injector drivers go, it only makes a difference if you're going to use peak & hold injectors. A '749 can be modded to work with low-Z injectors fairly easily. If you're going to use saturated injectors, it doesn't matter.

I'd suggest you consider your power goals when sizing the injectors. You can find the injector sizing formula or calculators all over the internet, so I won't retype it here. With the formula, for a turbo engine, I prefer to use an estimated BSFC of 0.6, and a max duty cycle of 80%. This makes for a greater safety margin than the .55 bsfc or 90% DC values that are sometimes suggested.

HTH,