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07-11-2007, 08:28 AM
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~ 62mm TB Question
I had my car tuned this spring and feel it is a little rich @ 12.7 (I have been told that the 2005+ stangs run better at 13.4)
I am installing a 62mm Throttle body when I get home and wanted to know how that will effect my A/F Ratio!? Wil it thin it out or make it more rich? If it will thin it out I should not need another tune....if it makes it Rich I will have to re-evaluate my install! Thanks
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 2008 Adrenalin 3-valve V8 .................(300hp/300tq) Mods: 22" Bullitt rims, %20 Tint, ROUSH exhaust Tip, Custom emblems, Steeda Bed-hook Plates Perf: Flowmaster 50SUV Muffler, Motoblu 4pc Pulley set, GMS Coilpacks, K&N Polished CAI Coming soon: Custom 1.25" Drop Springs, SCT Xcal3 (Custom Tune), Ported Throttle-Body 
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07-12-2007, 05:34 PM
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13.4?!!! That is really lean, sure you get more power but the wear and tear on the motor isnt worth uit. 12.4-12.8 is ideal for almost any N/A motor and richer then that if you have F/I. I would imagine that the AFR would lean out a little from the TB.
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08' GT500 06 Roushcharged stage 1....sold
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