With the 4 block start setup: first turnaround is exactly 8 frames both ways, then jump into a 2 frame right tap followed by a frame perfect 2 frame left tap.

In general you can do this from any distance using just the last jump (with 1 frame taps instead of 2 frames), as long as the wall has x values between 850 and 1025, and you are a multiple of 0.8 pixels from the wall (which has a 1/16 chance of happening if you stop at a random place).