For high rpm you want short runners whereas the length of these was tuned to give peak torque around 5k rpm... for comparison it's a similar runner length to the Mountune inlet. As a result it plateaus at the top end giving a lower peak power, but gives bigger gains in the mid range that you use most of the time. This is always going to be the compromise with runner length tuning. We could have asked for shorter runners (it's custom after all) but that's not what was wanted.

The Cosworth is well designed for certain applications but the runners are much shorter so are optimized for high rpm (or forced induction), but how long do you spend up in that range in a road car? It was also designed for a 2.3 duratec, not 2.0.

Doesn't matter at this point as the group buy is done so those who wanted one are getting what we wanted, but the torque figures speak for themselves (Red is FF, blue is cossie)... more power until 6k rpm, but if you want a larger peak power figure get the Cosworth or Pumaspeed.


Not long to go...