So I am looking to buy a skunk2 throttle body, but I wanted to get some information before I purchase it...

I noticed that their are different mm openings and was wondering how that will affect placing it on a stock intake manifold. Don't I need to match the openings or something?

I do plan on getting an intake manifold as well but can't afford both at the moment. Would it be better for me to the get IM first or the TB? Or does it matter. Thanks!

 

Right, you want the intake manifold to be big enough for the throttle body. Honestly though, you're wasting your money with a Skunk2 throttle body. I am assuming that you're looking at ~70mm throttle bodies, which is completely unnecessary and can actually hurt your performance by decreasing intake velocity too much for your engine. When you go with wider intake and/or exhaust, the powerband shifts upward. On a stock engine (or a slightly built one that doesn't rev much higher than stock), you are shifting much of that power out of the usable spectrum by increasing the intake size by too much.

You would be much better off with a larger OEM Honda throttle body (60-62mm) and an Edelbrock intake manifold (or even just a ported & polished stock intake manifold)


If you had a built high revving engine, a huge throttle body would make a lot more sense.

 

Okay, Thanks for the help. So Lets say the IM I decide to get is 65mm but the TB is 66mm. Will I have to make any modifactions to make it work properly?

I'm looking at this IM: Edelbrock

And this TB: 66mm is the smallest.

 

It would be okay I guess but you really should have the intake manifold the same size.

Why not just look at used OEM Honda throttle bodies? They have 60mm ones... your current one should be like 56.

 

Well considering the IM is 65mm, I should look for a 65mm throttle body?

I will look around. Thanks for all the help Trust.

 

The throttle body doesn't need to be as big as the intake manifold.

The intake manifold just needs to be big enough for the throttle body.


The reason is because with the throttle body smaller than the intake manifold, air flows freely when it passes through the TB and into the IM. When the TB is bigger than the intake manifold, airflow is disrupted by the part of the intake manifold that sticks out in the way of the path of air.

 

Okay I understand now. Haha.
While I was waiting for your reply I found an edelbrock IM that was 62mm and a throttlebody from a integra that is 62mm. So I think I am set. Thanks again.

Hopefully I will have it all ordered and installed within the next month.

 

Nice

62mm would be a good size. Not too big, not too small.

 

i wouldnt get a bigger tb unless u had FI or N2o