08-30-2010, 03:08 PM
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#7 (permalink)
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Track Member
Join Date: Jan 2010
Location: Seattle
Posts: 848
Drives: '13 GTI Stage 2 UNI
Rep Power: 17
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Quote:
Originally Posted by ImportConvert
Why? Is this because smoothing out intake flow will raise the A/F and possibly create a lean condition while un-corking the exhaust will create a rich ("safe") condition? Or is it that the ECU doesn't respond well without a tune to mods on the front half?
I honestly don't think a tune would be worth much (5whp?) if all was being done was correcting your A/F here.
Does the car surge or feel less smooth than before the mods?
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Lean condition is a possible worry. I threw a lean code shortly after installing my intakes. Thats why i opted for a dyno pull to see if things were checking out. I would say 5hp is a good guess on gains from a tune with bolt on's. It has been to long for me to comment on smoothness of power delivery pre and post mods.
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2013 Drivers ED GTI | Stage 2 Unitronic
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