fwiw when i rescaled for 4.10's the computer says it should be shifting at ~86mph which i think worked out to ~5200 in kasey's car...once he gets dynoed we can see where his peak hp is & determine where we should set the 3-4 shift to occur. He was trapping at ~92mph in the 1/4 and we'd prefer not to have his car shift into od before the traps.
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