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Usually yes. Think about it. You went from 450's too 550's. Roughly 15% more fuel so to get the exact same tune you should just pull 15% from lo and hi. Now the stock afr is around 9.5:1 so pulling more than the 15% is normal at WOT since you want to run around 10.9:1 on pump gas.
But do what your fuel trims need to get close to zero or 100%. I would invest in a WBO2 for tuning WOT. It will take all this guessing game out.
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Jason~6bolt/4bolt E316G@32psi, ECMlinkv3, Corn Fed
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