Successful 1ZZ Throttle Body Swap

[Compeer]

Originally Posted by SENIORDH001

Need some advice, so I did a 1nz to 1zz throttle body swap and after successful completion of the swap I did a retune, however my car won't pass 188kmh @ 5500rpm. Before the swap I was going 210kmh at close to 7000rpm. Why is my car limited to that top speed after the swap? NB. This car is a 2016 vitz Gs, mods replaced headers, cold air intake with K&N filter, 2 inch pipe from the resonator. 115hp before mods, 123hp after mods.

7000rpm? should be limited to 6400 rpm unless you have changed the tune to get rid of rev lmit. Normally japanese cars have a speed cut at around 185, not sure if you just turned that back on with the retune?