4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

Ideal air fuel ratio!

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Old 03-01-2007, 11:32 PM
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tofasgt
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Default Ideal air fuel ratio!

Does anyone know what the ideal air fuel ratio on a 96 gt with pi swap would be?
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Old 03-02-2007, 12:00 AM
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97targa
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Default RE: Ideal air fuel ratio!

doesn't matter what motor you have I'm most + it's 13.2 alot of aftermarket chips run you 11.5-12.5 for lean power, but can be bad. You need an 80mm maf 21-24lb injectors, stock fuel supply will do the trick most of all a custom tune not a handheld junk box. Your car will never run full potential with one of those things. You need Live diagnostic tech support computer programs that they will not provide for you.
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Old 03-02-2007, 12:02 AM
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ZW99GT
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Default RE: Ideal air fuel ratio!

The safe line on most dynos printoutsare 13 or so.
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Old 03-02-2007, 12:08 AM
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2000GT4.6
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Default RE: Ideal air fuel ratio!

ORIGINAL: 97targa

doesn't matter what motor you have I'm most + it's 13.2 alot of aftermarket chips run you 11.5-12.5 for lean power, but can be bad. You need an 80mm maf 21-24lb injectors, stock fuel supply will do the trick most of all a custom tune not a handheld junk box. Your car will never run full potential with one of those things. You need Live diagnostic tech support computer programs that they will not provide for you.
Nobody is running a n/a setup on a a/f ratio of 11.5/12.5 for power. The only setups running a a/f ratio like that are FI setups.

Somewhere around 13:1 is the ideal range.
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Old 03-02-2007, 02:07 AM
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Car_Ramrod
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Default RE: Ideal air fuel ratio!

i had heard 14.7 somewhere. or is that just at idle/cruising?
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Old 03-02-2007, 02:19 AM
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DSTANG03
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Default RE: Ideal air fuel ratio!

my tuner brendspeed said to run at idle you should be around 14.5......5-30mph you should be around 13.7ish depends on your motor and how far you want to push it
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