What accord 5 speed transmission is best for turbo? I have a built f20b but i forgot which accord transmission has the best gearing for turbo. Since they have longer gearing then the preludes

 

There really is no best. It depends on your power level, tire size, what you use the car for, personal preference, etc.

I'm running an M2S4(Prelude H23A1) trans right now and around 400whp there's a lot of tuning wizardry involved to get any meaningful traction even with good suspension and large sticky tires.

When I turn the wick up to 600-700whp I will have to switch to a cuffed F22 trans(longer gears) for the sake of traction.

You can get away with shorter gears if you run lower power but the higher in power you go the more traction issues you will have because of them.