Purely out of intrest to settle a topic with my friend.

Straight line race both in boost, both 330bhp

One classic has single scroll tdo5 with equal length headers

Other classic has twin scroll conversion

What would win? And would there be much difference

 

Headers

 

The one with the fastest gear changes

 

depends on how much fuel they both have, tyre pressures, drivers reactions . .
a classic impreza would win.

 

In the terms of the cars performance

 

Drag strips are not where twin scroll cars win, on the road with in gear performance is where they dominate over single scroll units, but they are less laggy by some considerable margin over single scroll units and so more responsive in every day driving.

 

same gearing?