OP, I use 32psi cold front and rear, which is ~38psi hot (for me).. same as on the street
if the car starts to understeer I use this trick called entering corner slower... and then follow up with get back on the gas sooner.. seems like it is working ok so far. As the day goes on and the tires get hotter and the ambient temp gets hotter, I have to sometimes enter slower. No point in trying to push the tires more when they are already showing signs of heat
personally, i would return the engine to stock. seems like a tune is unnecessary at this point
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