Instead of having the throtle body off-set on the passenger side of the intake manifold.

Why doesnt someone design a intake manifold that has the throttle body at the center of the intake manifold?

I realise for a near stock chassis on a street car this would be hard to do. But on a full tube frame drag car I would think they could fit the throttle body on the center of the intake manifold

I know either some nissan inline 6 or a bmw inline 6 has this setup on the intake manifold. But I couldnt think of what car when I was posting this.

I was thinking this would probably work out more with turbo cars because of having an extra 45* kink wouldnt hurt performance that would be noticable.

with n/a an intake setup could be done with a cowl type of hood

 

Well, let's get one thing straight first off, I'm no engineer. But, from what i've read, air will only follow a 7 deg. change in direction without something redirecting it. The plenum of an intake manifold somewhat acts as a holding tank for the next cylinder to recieve it's charge from as the intake valve opens. It just seems like you would get better distribution between cylinders with a typical plenum. I would think that a t/b being in the middle would direct more air into 2&3 than 1&4. Remember, just my thoughts, i could be way off.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">Well, let's get one thing straight first off, I'm no engineer. But, from what i've read, air will only follow a 7 deg. change in direction without something redirecting it. The plenum of an intake manifold somewhat acts as a holding tank for the next cylinder to recieve it's charge from as the intake valve opens. It just seems like you would get better distribution between cylinders with a typical plenum. I would think that a t/b being in the middle would direct more air into 2&3 than 1&4. Remember, just my thoughts, i could be way off.</TD></TR></TABLE>


agh very well said, if you look at either bullish car or roger sangco's aebs crx there is 2 throtle bodies on the top of the plenum. They must be doing something right as the bullish boys are at the top of there game, and roger at the time was the quickest in the all motor crwod.-pdang

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bambooluv &raquo;</TD></TR><TR><TD CLASS="quote">


there is 2 throtle bodies on the top of the plenum. </TD></TR></TABLE>

you got my noggin thinkin again....uh oh

 

This is carburetor type technology. Individual throttle bodies might make more sense.
BTW, I'm no engineer either

 

If yur gona have really big PSI
U might want a blow back style plenum
Blowing into the roof fisrt

 

The Nissan RB26DETT may be the one you're thinking about, but it has an individual throttle body for each cylinder that are fed from a much bigger plenum with a 3" inlet so its like a typical plenum, but the throttle bodies are up next to the cylinder head.