63mm Throttle body

[RichS]

Where do you send the Throttle bodys to have them done up to 63mm?
Thanks

[A26B]

Originally Posted by RichS

Where do you send the Throttle bodys to have them done up to 63mm?
Thanks

Two options that I am aware of, in no particular order;

Marc Haibeck
Greg VanDeventer

[secondchance]

Mine was done by Marc. Superb workmanship!

[RichS]

I saw on Marc's site about fine tuning not for the over size?
Thanks

[secondchance]

It was bored out to 63mm. His throttle plates are matched closely to the bore negating any need for the magical GM DAG.

[RichS]

Is this something needed on a stock cube, ported motor? Trying to search for answers to some of this stuff and can't find anything. Think I've read 1000's of pages on the site!

[XfireZ51]

Originally Posted by RichS

Is this something needed on a stock cube, ported motor? Trying to search for answers to some of this stuff and can't find anything. Think I've read 1000's of pages on the site!

I have had a 63mm on my motor from the time the top end was ported. Not sure it makes a ton of difference with just that level of mod.

[LGAFF]

I did my own, had a shop bore out the TB and had throttle blades made by Kinsler....no issues

[secondchance]

According to Marc, even bored, stroked to 378 with head porting and top end porting, may pick up 5 hp at high rev.

[RichS]

Hmmm, I guess I'll wait till then...