What can you tell me about the 74mm TB?

[edc]

Originally Posted by Topless

This is what I would expect as well. I don't see the stock intake, TB, and plenum as a significant restriction with stock displacement. Unless you add 3.4L the result will just be a narrowing of the torque curve. Maybe a few Dyno ponies above 6k rpm but overall slower lap times on a race track. Less than ideal results.

I've posted the plots a few times before so I won't post again but for all the mods I did each one showed a power and torque gain after about 3500rpm. It's not just a peak last 1000rpm gain.