Yup, just make sure you don't bore them out to much.

The stock bore starts at 50mm, and tapers to 47mm, IIRC. You should be able to bore the whole thing out to 50mm (getting rid of the taper) without touching the butterflies.

However, when you go larger, like to 52mm (recommended for 5.9L V8), you need larger butterflies.

 

What I was saying is that I bored it to just under 50mm and the stock butterflies are too small.

 

Anybody know a source for pre made 52mm butterfly plates? I could drill my own screw holes if necessary. I've been looking around and haven't found anything yet.

 

I was looking for 1.988 or 1.99 for a while and didn't find any, all I could find was 2", so I'm gonna have to play with them and the belt sander to get them right.
So what I'm saying is good luck finding some that will work for 52mm.
Also keep in mind that the plates sit at about a 14º angle and have the edges cut in such a way as to keep them from sticking to the bore on the TB. So if you but 52mm plates for a 52mm bore then they will be too small.
My stock plates are 1.978 and fit perfect if they lay flat, but when they are in the bar then there is a gap since they are at an angle.

 

Bummer. Good to know though. Thanks for posting.

 

i wonder if you could get the butterflies of a chevy lt1 intake. Those butterflies are 52 mm with what looks like the same screw holes. just a thought

 

hmmm might have to check out the u-pull yard next week. good thinking man.

 

yeah check out the camaros or firebirds as they have dual ports on the TB. i will do some thinking to see if i can come up with some more that are 52 mm dual port

 

Check this link out. This is what I plan on doing...

http://www.*********.com/forums/showthread.php?t=258354

 

lol must be a competitor of DodgeForums.com cause the linky aint working.