throttle bodys s90 vs 1g tb vs non turbo tb

[jpmxrider489]

My goals have changed since I got a new daily driver. 600awhp is a huge goal but im doing everything I can. Over the winter im doing my motor. But the main question is what tb should I use. I have a race manifold ready to order but what flange should i get. I already have a very nice 1g that was rebuilt and powdercoated. Will that get me there or will it hurt. I believe the 1g nt and 1g turbo is the same mm correct? I know everyone like the s90 but is it worth it. I already have 160 in my 1g tb. Should I use that or save and buy the s90?

 

[snowborder714]

The N/T's typically have 4 vacuum ports - the same as the 1g turbos.

 

[jpmxrider489]

The N/T's typically have 4 vacuum ports - the same as the 1g turbos.

What do you mean typically? So is there one port like the p that sees boost and vacume?

 

[snowborder714]

The Evo 3 throttle body is identical to the N/T except it has 1 vacuum port facing the intake manifold. I'm not sure if this is on the manifold or IC pipe side of the throttle plate, but I would guess manifold.

I think I have one that has 3 vacuum nipples (missing the A1 nipple - the one that's angled and not straight out). I'm not sure what vehicle this came from though.

 

[jpmxrider489]

I had my 2g tb on and the nipples hit the intake since its on that side. The 1g fit nice on but the 2g didn't. Do you think I'll have that problem?

 

[snowborder714]

Since you plan on sticking with a 1g N/T, then no, you won't have the problem.

 

[jpmxrider489]

The nipples point to the ic pipe?

 

[snowborder714]

The nipples are towards the IC pipe.

1g N/T (3 nipple version, but still the same setup)

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Evo 3

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[jpmxrider489]

It would have to be the nt tb. The nipples would hit my smim. I'll post pics when I'm done.

 

[jpmxrider489]

Is there a certain year nt throttle body I have to get. I know the 90 turbo tb to stay away from. The 2g nt tb smaller? What year tb should I get?

 

[snowborder714]

'91-'94.

 

[jpmxrider489]

So I know its been awhile since I posted but here is a pic of my non turbo tb.

 

[fosforito95]

what size is the nt throttle body? 60mm?

 

[snowborder714]

Yes.

 

[jpmxrider489]

Does the "p" port on the non Turbo TB read vacume?

 

[tsi6bolt]

I am curious how your decision ended up? Did you dyno with that tb? I am at the same point in my build and have a magnus intake already flanged for 75mm but also have a 1g tb laying around should i just rebuild it and run it? I can go and get the adapter but like snowboarder714 said more area to leak.