Jdm GSR b18c getting ready for dyno tips please!

My setup is: stock b18c long block
4-1 yonaka headers 2.5
2.5 test pipe to 2.5 yonaka exhaust
Blox intake manifold
64-65mm throttle body tapered to 3 inch intake outlet

My question is I already have all the bolt ons, is a 64-65mm tb overkill or should I put my stock 60mm tb back on for a better Powerband. Once I installed the 64mm it feels as if I lost low end and top end feels sluggish. Maybe because it's not dynoed tuned?

Downgrade to 60mm tb or keep it at 64mm?

Why not ask your tuner?

Exactly! or better yet test both on the dyno. I suspect the bigger one will make more power.

PS - Your 65mm TB doesnt taper to 76mm. 3" is the OD not the ID.

Thanks guys!