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Old 03-26-2008, 02:28 AM
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Default Tuning AFR's?

This is nitrous related. Since there isn't a specific nitrous section, I still think it counts as forced induction.

When tuning AFR's for nitrous, I HEAR that you should tune it NA first and then tune the AFR's to mid 11's during spray. Does anyone know if this is true or not?
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Old 03-31-2008, 06:52 AM
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it'd stand to reason, though I've never personally tuned for nitrous. That's about what you tune for on turbo's though.
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Old 03-31-2008, 10:33 AM
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Thanks for your reply.

I did manage to get the Zeitronix hooked up this past weekend. My NA AFR's were a steady 13.0-13.1 from 2k to redline. It was a bit rich on spray with a reading of 10.9 but that was expected due to low nitrous pressure. Once I get the bottle refilled and maintain the pressure I should be in the mid 11's - low 12's.

Oh, I bumped the jets to a 75 shot also.
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Old 04-01-2008, 10:11 AM
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Usually you tune with the fuel jets in Nitrous applications IIRC. I'd say your afr's should be in the mid 11's too when spraying.....perhaps with colder range plugs and a degree of timing removed...
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Old 04-01-2008, 01:05 PM
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You are correct in tuning with the jets.

I am running 1 step colder copper plugs also.

As far as the timing, I would have to have the dealership do it with the ConsultII.
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Old 04-03-2008, 10:14 AM
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Ideally, you only want to pull the timing WHILE you are spraying. I wouldn't make a permanent change in the ECU with the Consult if there's any way to avoid it.
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Old 04-03-2008, 11:11 AM
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Most Spec V guys advance timing by 2° for NA. I think I'm going to leave it be. I've never heard of any issues with nitrous and Spec V timing and I know quite a few locally that have run and are running 75 shots in the Spec.
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