09-30-2014, 09:47 PM
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#1 (permalink)
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A True Z Fanatic
Join Date: Dec 2011
Location: Fayettenam,Pennsyltucky
Age: 70
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Quote:
Originally Posted by aszyd
They are insisting that you are losing low down torque due to the loss of back pressure from having no restrictions, such as cats, and a larger pipe diameter, which would increase flow. A tune would correct the A/F and bring some of that lost power back.
As for consequences, if you were really lean it could cause detonation and damage your engine. I doubt that's happening though. The ECU will compensate as much as it can.
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When the ECU is in closed loop. It can adjust the A/F pretty close to where it needs to be, unless it is too far to the one side. Then you need a tune. At WOT, think you will need a tune to correct the A/F. As for engine damage. Agree, detonation, burnt exhaust valves, turn the tops of the pistons into silly putty, burn the ends of the spark plugs off, etc. Don't ask me how I know. 
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