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Old 01-02-2011, 12:27 PM   #1
thesoundproject
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low boost hii compression

Question Throttle body, need advice!

Im looking into throttle bodies for my 00 2.2L and I cant find a throttle body spacer for that year. So I was wondering if a new, bigger throttle body spacer would actually increase performance. they have 60mm, 70mm and 80mm what do you guys think?
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Old 01-02-2011, 12:28 PM   #2
thesoundproject
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I meant to say throttle body on the second part not *spacer*
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Old 01-02-2011, 02:13 PM   #3
flightwatch
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It will make the car "feel" faster, but unless the stock tb is a restriction, it won't make it any faster. I would never go with the 80mm...that's way too big. Even the 70mm is pushing it.
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Old 01-02-2011, 11:51 PM   #4
Patrick Olsen
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Quote:
Originally Posted by thesoundproject View Post
I meant to say throttle body on the second part not *spacer*
So click the "Edit" button and fix it rather than making another post.

Quote:
Originally Posted by thesoundproject View Post
So I was wondering if a new, bigger throttle body spacer would actually increase performance.
No (nor will a throttle body spacer).

Subaru seems to use large throttle bodies from what I've seen. From the factory my good ol' 5.0L made 225hp through a 55mm throttle body, which is smaller than the stock throttle body (~62mm) on my 165hp EJ25D. The 230hp SVX used 2 63mm throttle bodies, which have a 50% larger combined area than the stock 75mm throttle body on my 400hp CTS-V.

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they have 60mm, 70mm and 80mm
Who is "they"?
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Old 01-03-2011, 12:22 AM   #5
Jessekrs123
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You can also do the throttle body coolant removal.

There are 2 ports on the throttle body, 1 receives coolant and the other gets rid of it. As you should know, coolant gets pretty hot after warming up, and if you have ever felt your throttle body after a drive, it is pretty hot. So essentially, the hot throttle body is making your intake charge a little warmer.

The only purpose that these coolant lines serve as is a preventative measure for throttle freezing. Obviously, this might be a good idea to keep around until winter is over, but once spring and summer comes, you could just bypass this by routing the 2 lines together. It will allow your intake charge to be somewhat cooler than what it was with the coolant hooked up.

You can look into this, just search it, you will find stuff about it. You can also, as you have said, look into throttle body spacers, and look into phenolic spacers as well. I've seen small maybe 10mm IIRC throttle body spacers for some Subaru applications. The phenolic spacers also somewhat cool the intake charge separating the hot engine from the intake manifold, so it offers a little cooler charge, and it lengthens your intake runners so you should get a minute bump in power. Grimmspeed offers phenolic spacers for numerous Subies.

Ceramic coating your water cross-over pipe could keep a lot of heat away from being right under the intake manifold.

It doesn't necessarily guarantee you more power, but all these things will somewhat cool your intake charge, simply freeing up a little more response.

Ofcourse all of these things will be more noticeable on a turbo application and less noticeable on an N/A application. It's your choice though, if you have the money and wish to do this, go ahead, no one is stopping you.

Just a few ways off the top of my head you can cool things down a bit.
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