As I've already said, any loss of low end torque is not an issue as my car only weighs 700kg - it is going to give me 0-60 in around 3 seconds in its present state of tune and mid-top end is more useful on the track! I have lightened the flywheel to make it rev a little quicker too. Also I am mapping it with an MBE ECU so any mods will be compensated for.
The secondaries are quite restrictive in their natural form (and the shafts don't help matters either)and I found that on the track, the transition from 6-12 bores was a bit messy (powerwise) and pinning them open improved things a little, allowing a smoother power curve. Therefore removing all restrictions should logically make things even better. It will also prevent the carbon build up on the secondary butterflies which is a common problem on these engines.
