Ok, just updating this thread with my installation of a 65mm TB
Results = crap
Why? = lost power down low till 6000rpm, couldn't tell the difference at top end. Throttle response from Idle was further increased though. Other than that, nothing.
I read up a bit on TB the other day. Says it won't help if your TB is already big enough. Infact it'll make you loose bottom end(which was true). Says it won't flow anymore air than your cams allow it to. Meaning if your intake and exhuast is already efficient, then it won't flow anymore air through than your cams allow it.
Also notes that, a bigger TB might make it feel more powerful at part throttle because of the bigger volume it gives over a smaller TB at the same throttle position. But at Full Throttle, it won't flow anymore more over a smaller TB, providing your intake and exhuast is efficient.
This just goes to prove that bigger isn't always better. You'll just loose velocity and bug down the bottom end and gain probally 1 hp at the very top end when you have to change gears.
I don't know if everyone likes that but I won't want to sacrifice loosing a chunk of low -mid(1000-6000rpm) range power band for 1-2hp at the last 500rpm band
I also think for those who have J's Racing Intake, that you don't need a bigger TB because of the already large Volume that the intake design gives you. Maybe for the stock Intake or say a MUGEN or AEM intake, wouldnt be as **** as on J's intake, but then again, if you've got stock cams, FORGET IT!