6-bolt N/T Throttle body on 7-bolt tsi?

[91Bomb]

I have a good TB off my 6-bolt N/T and wondering if I can use it on my '93 7-bolt turbo car? If so and it's considered an upgrade should I swap it in for running 15 lbs boost?

 

[Boomdeeze]

If the intake manifold has a 60mm opening, then yes I would run it. I am running a 1g N/T TB on my 6 bolt swap in my 2g, and I am running 22 psi daily on it with no leaks.

 

[91Bomb]

I have the stock 7-bolt intake manifold on my car now but saved the 6-bolt manifold so I guess that's something I shouldn't sell in case I ever need to swap them?

 

[Boomdeeze]

What so do you have the 1g head or the 2g head?

 

[91Bomb]

I have a stock '93 tsi 7-bolt and spare parts from my N/T 6-bolt including TB + intake mani..

 

[snowborder714]

So if you have a 1g 7 bolt, you should have a 1g head and 1g intake manifold. So you can bolt up the 1g N/T throttle body without any intake manifold bore issues. You'll just have to get rid of the throttle body elbow.

 

[91Bomb]

Ok so ditching the elbow means I can connect the stock intake hose right to the 6-bolt N/T TB?

Exactly what is the deal with the 6-bolt N/T TB? It has a wider opening than the 7-bolt turbo 1g TB? Will it make any difference running 15 lbs boost?

How about the intake mani? Are the 6 + 7-bolt 1g mani's different too? If so any big advantage to swapping in the 6-bolt mani at that boost level?

 

[snowborder714]

Ok so ditching the elbow means I can connect the stock intake hose right to the 6-bolt N/T TB?

By intake hose you mean upper intercooler pipe, correct? Your intake pipe always connects to the turbo inlet. But if you want to use the 1g N/T throttle body, you'll need to have a coupler off of the throttle body to connect to the upper intercooler pipe.

Exactly what is the deal with the 6-bolt N/T TB? It has a wider opening than the 7-bolt turbo 1g TB? Will it make any difference running 15 lbs boost?

It eliminates a gasket. That's about it. It won't make a difference in running that much boost unless it's leaking somewhere. There are people pushing a lot of boost through both a 1g turbo and N/T.

How about the intake mani? Are the 6 + 7-bolt 1g mani's different too? If so any big advantage to swapping in the 6-bolt mani at that boost level?

A 1g intake is a 1g intake. There is no difference whether it's 6 bolt or 7 bolt.