A 3” throttle body..... kinda

Performance mods and Advanced Stroker discussion.
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Biggrnjeep97
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A 3” throttle body..... kinda

Post by Biggrnjeep97 »

Hello all. 10 years ago i started on a 3” throttle body for a super charger project i had built. Things change and i lost track of time and money so the project sat stagnant. Recently, I was reinvigorated to work on my jeep. I think ive all but scrapped the idea of finishing the super charger(its forsale btw), but i still wanted a 3” TB for the head i had ported. This shut down has had me working(im a machinist by trade) really long hours so ive been using my down time to machine a new prototype, as the first one failed. I have no idea if ill have these produced en mass yet but i would like to chronicle the evolution as i go so you guys can motivate me and make suggestions. As you see it, it is 2.95” ID and needs a final boring on a lathe. I will make a new throttle plate and modify the stock shaft. This will use all of the stock parts in the stock locations with the exception of the MAP.
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4.7 Stroker, AW4, Dana 60, 14Bolt, AtlasII 4.3, 104"Wb, 40" Nittos on Walker Evans
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Biggrnjeep97
I made it to triple digits!
I made it to triple digits!
Posts: 114
Joined: December 10th, 2008, 5:40 am
Stroker Displacement: 4.7
Vehicle Year: 1997
Vehicle Make: Jeep
Vehicle Model: Wrangler
Location: Wash.,DC

Re: A 3” throttle body..... kinda

Post by Biggrnjeep97 »

Here are some pics of the first one i made. I completely glossed over that the stock shaft couldnt be used with this design. I got really tired of trying to adapt throttle cables and TV cables in its new location on the supercharger. Also I miscalculated some distances and left almost no room for a bearing. In all this one didnt work. Back to the drawing board.
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4.7 Stroker, AW4, Dana 60, 14Bolt, AtlasII 4.3, 104"Wb, 40" Nittos on Walker Evans
Tolemar
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Re: A 3” throttle body..... kinda

Post by Tolemar »

Nice work! keep us posted.
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Biggrnjeep97
I made it to triple digits!
I made it to triple digits!
Posts: 114
Joined: December 10th, 2008, 5:40 am
Stroker Displacement: 4.7
Vehicle Year: 1997
Vehicle Make: Jeep
Vehicle Model: Wrangler
Location: Wash.,DC

Re: A 3” throttle body..... kinda

Post by Biggrnjeep97 »

Small update. Got the TB functional. I made a fixture for the stock throttle shaft and machined it to 3" width. Also made a new butterfly out of .06" 2024 alum. Needs some final fitting and some shorter screws but its ready to go. I still need to machine the intake to match. As a note, im unhappy with a few parts of my design. One of those is the width of the gasket flange. It gets very thin so i only bored this one to 2.950" to maximize the gasket surface. I have altered it in my CAD drawing so if i make more, it will be thicker all the way around at the flange.
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4.7 Stroker, AW4, Dana 60, 14Bolt, AtlasII 4.3, 104"Wb, 40" Nittos on Walker Evans
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SkylinesSuck
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Re: A 3” throttle body..... kinda

Post by SkylinesSuck »

Great work!
Russ Pottenger
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Re: A 3” throttle body..... kinda

Post by Russ Pottenger »

Nice work.

I’ll be curious to see what your throttlebody base on your intake manifold looks like.
Russ Pottenger
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Re: A 3” throttle body..... kinda

Post by Russ Pottenger »

Russ Pottenger wrote: June 10th, 2020, 10:44 am Nice work.

I’ll be curious to see what your throttlebody base on your intake manifold looks like.
Answered my own questions by looking at all the pictures.

:Note to self:
Don’t post on threads until after the 1st cup of coffee.
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Biggrnjeep97
I made it to triple digits!
I made it to triple digits!
Posts: 114
Joined: December 10th, 2008, 5:40 am
Stroker Displacement: 4.7
Vehicle Year: 1997
Vehicle Make: Jeep
Vehicle Model: Wrangler
Location: Wash.,DC

Re: A 3” throttle body..... kinda

Post by Biggrnjeep97 »

Havent gotten there yet. The TB adapter on my supercharger is 1/2” plate bored to 3”. I will probably wind up welding, facing and drilling the manifold. I did make an adapter at one point for a durango TB but dropped that because the juice wasnt worth the squeeze IMO.
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4.7 Stroker, AW4, Dana 60, 14Bolt, AtlasII 4.3, 104"Wb, 40" Nittos on Walker Evans
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