it's toooooo slowwwww!!!

[tempest404]

When it comes down to the running though do i need to go aftermarket with the ecu? Or is the stock one viable?

Eyeing up an exhaust system atm

[invader166]

Originally Posted by tempest404

When it comes down to the running though do i need to go aftermarket with the ecu? Or is the stock one viable?

To take advantage of the full Prius pistons compression you'll probably need a progamable aftermarket ECU. Maybe you can get away with using the stock one, but don't expect the same gains.

Someone is selling their Haltech here: http://www.yarisworld.com/forums/showthread.php?t=54910

If you plan on keeping the 1NZ engine, i'd also suggest looking into lightweight pulleys or even a flywheel. It might not make any HP but it will certainly help with acceleration and help make the car "feel" faster.