99superjeep01

i'd like to bore out my throttle body to a larger size and i'd only need a new butterfly valve and all i've been seeing online is companies or people that'll do the whole thing for you. does anyone know where i can get just the butterfly valve in a larger size?

cruiser54

Nope. but for $90 exchange, this place can't be beat:

www.strokedjeep.com

99superjeep01

Yeah but I can machine it for free, all I need is the valve.

cruiser54

Contact them. Perhaps he'll sell you one. Can you slot the throttle shaft bigger also?

5-90

Why not machine the plate as well? Figure out what size you want, find some bar stock, and cut & turn the plate out. Problem solved!

99superjeep01

Yeah I probably could make it, but I haven't pulled anything apart to see how the valve is made and I figured it couldn't be too pricey for a small piece of metal so I figured I'd just buy one.

the_big_h

I bored mine out without even removing the throttle plate. Maybe I don't get the full gain of being bored out all the way through, but I like it.
Got the outlet diameter to the same as the intake manifold hole, and tapered up towards the throttle plate as far as I could reach without hitting it.
It only came out of the chuck once
Finished up by sanding by hand, to make smooth transition.