I recently converted auto to manual transmission, Honda Prelude BB8.

Manual gearbox (5 speed) is from 1990 Honda Accord.

It is 5 speed auto trans, tiptronic with LSD before converted.

Now car runs slower comparing when it was auto.

It used to be faster than Lancer Mivec, Honda B18, B20, all manual gearbox.

What can be wrong?

Some people said I selected wrong gearbox for this conversion.

FYI engine internal (H22A) is stock with head porting, intake, header, bigger throttle, custom camshaft, exhaust modification.