I've been kicking around the idea of throttle body size, and was interested in this groups opinions/experiences in that area.
My setup is a 306, TFS High Port heads ported/polished, GT40 Intake, b303 cam, hooker super comp headers through 2-1/2" exhaust all the way back. I believe the blower is an A trim, makes 8-10 psi right now through a 65 mm throttle body and EGR Spacer. This is in an 89 mustang coupe, with a 5 speed, 4:10 gears and all kinds of other stuff like MSD ignition components, etc.
Will a 70 mm be worth the investment, or is a change really not going to net any worthwhile HP gain? Car is street driven to/from work and errands. Hasn't seen the track since the blower was installed, but ran 13.0 N/A
Any help is appreciated,
Charlie
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