Secondary Injector upgrade on S4 NA
01-04-15, 06:20 PM
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Secondary Injector upgrade on S4 NA
I don't see much online about people upgrading their secondary fuel injectors on their NA rotary's, is there much point? I was thinking of trying some TII 550cc injectors in the secondaries on my S4 for the hell of it. I have a header and no cats, and I am planning on porting my intake, however I am running the stock ECU, so I don't know if it will do anything. I guess the worst that can happen is it will loose power and run way too rich lol.
01-05-15, 01:17 PM
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the S4 doesn't run that rich actually, a stock S4 with the wideband installed was in the mid 12's up to about 6500 rpm, it does go rich after that, but it also runs out of airflow.
i think the S4 AFM has enough measuring range to figure out a couple of mild mods, but if you're really making power with it, it does get a little lean.
i think the S4 AFM has enough measuring range to figure out a couple of mild mods, but if you're really making power with it, it does get a little lean.
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