Quote:
Originally Posted by 2gnt2wrx
There is no "increase/decrease" IDC option. You actually have to scale the injectors back... like on my old sti, I had 1200cc injectors.... I had to scale them to 800 something in order to get it to idle properly on E.
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Being able to idle on large injectors is a separate issue. If you want to talk semantics, you can't "scale back" injectors either. Injectors always have the same flow rate at the same fuel pressure. You control how much fuel gets injected by controlling how long they are open, that's called the Injector Duty Cycle.
The fact remains that you need to pump about 30%
more fuel into the engine for E85 than Gasoline, not less. By increasing the amount of fuel being injected into the engine, the IDCs go up. Larger injectors are needed for high horsepower applications because more fuel is needed.
If you went from 1200cc injectors on gas to 800cc injectors on E85, you had around twice the injector needed for your application on pump gas.