Make your own throttle plate?

[JeepsAndGuns]

how about 65 and possibly turn it down the 3mm you need? i can think of one or two of those off-hand, though i don't know if the fastener locations on the plate will match the shaft of your TB.

That thought crossed my mind also, find one slightly bigger and turn it down.
I guess the only way to tell if it would work would be to try it. New holes can be drilled easy, I had to do that on the 75mm blade I have in my vortec TB I have on my cherokee. The stock blade has that deflector rivited to it, but I found the throttle blade from a late model northstar engine is the same size, but with no deflector. I just had to drill 2 new holes. The throttle shaft covers up the old holes and causes no issues.
What should I look for at the junkyard?

[RobertISaar]

the oldsmobile 3.5(shortstar) has a 65mm TB, popular to swap the entire unit onto 60V6 engines with an adapter, should see plenty of those in a junkyard with blown headgaskets.

not sure how well it would work, but the 04 to 06ish 3500 has a DBW throttle at 65mm. not sure how easy it would be to pull the plate out.

a google search shows a lot of interesting 65mm applications, especially some older stuff should your yard not have any newer vehicles(the ones local to me have a lot of mid to late 90s stuff, not much outside of that).

a search for 62mm throttle body also shows a lot of interesting stuff.

http://www.jeepsunlimited.com/forums...ich-one-to-get

dakota 4.7 are apparently 65-68mm.

[JeepsAndGuns]

the oldsmobile 3.5(shortstar) has a 65mm TB, popular to swap the entire unit onto 60V6 engines with an adapter, should see plenty of those in a junkyard with blown headgaskets.

not sure how well it would work, but the 04 to 06ish 3500 has a DBW throttle at 65mm. not sure how easy it would be to pull the plate out.

a google search shows a lot of interesting 65mm applications, especially some older stuff should your yard not have any newer vehicles(the ones local to me have a lot of mid to late 90s stuff, not much outside of that).

a search for 62mm throttle body also shows a lot of interesting stuff.

http://www.jeepsunlimited.com/forums...ich-one-to-get

dakota 4.7 are apparently 65-68mm.

That gives me a few things to look for next time I go to the yard. Usally its hard to find anything newer than the early 2000's at the one I go to the most (pull a part)

[EagleMark]

Here's some usful information if your going to build some throttle plates. From EFIhardware.com

EFI HARDWARE PRODUCE 6° THROTTLE PLATES

In the past, 12° throttle plates were the industry standard. The problem with 12° throttle plates, is that as the plates are moved off the closed position, the change in airflow is huge. It makes it very difficult to drive smoothly at lower throttle openings.

At EFI Hardware, we only use 6° throttle plates. This improves off idle and cruise driveability making your vehicle far more enjoyable to drive.

[Six_Shooter]

That's a bit if a red herring. So what if the actual opening is twice as much at a defined throttle position? We drive by feel so we will only open the throttle enough for the amount of acceleration we want.

[JeepsAndGuns]

Wet to the junkyard this morning. Found one of the shortstars, pulled the plate out of it (charged me a whopping $0.50...lol) Didnt see any of the other above mentioned vehicles.
Brought it home and thought I would test fit it to the shaft, its too thick. The original blade is .063 thick, the shortstar one is .080, its also 64mm. mounting holes are also real close, just a few hits with a small round file would make it fit.
I think I figured out a way to hold it while turning it down, but I am not sure what to do about the thickness. I'm not seeing a easy way to make the slot wider.

[User Nameless]

I am going through the same thing, different unit. The Eaton M90 supercharger on the 3800 series 2 L67 engine has rebuild kits and individual parts available. My boost bypass rotating butterfly valve has abnormal wear on one side. It looks like something was pulling on the rotating shaft that connects to the vac diaphragm. I have seen only one for sale on ebay and they wanted $65 for it. To the junkyard I shall go.