pros and cons

[Moparman1991]

What are the pros and cons of using a bigger throttle body? I found one that I didnt realize I had in all of my extra parts. I believe its the 52mm?

[tryingbe]

Larger T/B is useless if you have stock 1 piece intake manifold.

[Moparman1991]

Why is that? even with Porting?

[The Pope]

the neck on the 1 piece is too small for the bigger 52mm TB, no difference

The neck on the 2 piece and be ported around the corner to a 52mm TB

The 58mm TB is used with a custom plenum. The 58 makes for much faster throttle and turbo response and allows a larger turbo to spool. With a ported top end and plenum on a 2.5 the car spins the tires before boost. The 52 also makes the turbos hit harder too with a completely ported top end. Much of what you want is to add a larger turbo and be able to use it, the bigger TB is part of that mod list. Actually top end HP gained at boost is questionable.

[jamierpm]

what engine did the 58mm come on?

[The Pope]

Quote:

Originally Posted by jamierpm what engine did the 58mm come on?

99 mini van, 3.8L HO

[Moparman1991]

What if I cut the neck off? The TB I have came with an aluminum piece that bolts up to it(I can put a pic on here later). Would it be worth cutting the neck off and welding it on straight?

[Moparman1991]

Here it is

[jamierpm]

Quote:

Originally Posted by The Pope 99 mini van, 3.8L HO

I have a 98 3.8L minivan behind my shop but I don't think it is a HO, what size tb would that be 52?? What model minivans had a 3.8 HO , caravan sport?

[Moparman1991]

How would it do if I cut the elbow off welded the piece on thats in the pic?