some local guys that run stock have tried running a 58 just to see what it does....made no difference....same with injectors, even after tuning

 

I can see how it wouldn't make much of a difference on the TB size unless the motor is sucking the plenum dry on top end. I tune my car in Alpha N mode and although it has 36# injectors I could probably make it run as well with 30 or 42#. It's all a numbers game until the map goes static.