do you have to port your intake when you use a 58mm throttle body i mean the stock holes for your throttle body how big can you go with stock throttle body openings?

 

yes you have to open them up to a 58mm size

 

what about 52mm

 

Or u can just by my intake and throttle body yout injctors and map and bolt it on http://members14.clubphoto.com/micha...48/guest.phtml

 

You can run up to a 54 on an unmodded intake.

-Chris

 

Send me a PM with your e-mail address and I'll send you some photos of how to neatly machine-out (not grind) at home the intake venturas to 58mm.

 

I just bought a 1995 M6 Z, it has a 58mm TB. If you do not open the venturis, will the blades even open correctly? Just curious if it is a fitment issue or an issue with proper function otherwise....

 

The blade will open correctly but this probably wouldn't flow any better than the stock setup as the smaller intake bores will provide a signifigant restriction to CLEAN flow. Even a 52 is a waste on a stock engine though so you might consider going back to stock.