wot do quad throttle bodies do?

[Jooce]

guh im trying to learn about my redtop engine and was told quad throttle bodies with velocity stacks is good. someone please explain exactly what they do and if there worth doing at all ?

[Bling]

For the hassle and cost vs performance gain, its not something worth doing for your engine.

instead of having one throttle, (intake point), you have 4 throttles (intake points) which is usually more room for air to get sucked in thru to engine.

tried to explain it as well as i can in simple form as its more complicated than the above i'm just giving you an idea.

[Adamal]

Having individual throttle bodies gives you greater control over the air going into each cylinder. Helps give even air velocity and resistance for each cylinder.
Works best in an N/A situation, where the air is being sucked in by the engine, rather than being forced in.

Also, with trumpets/velocity stacks/whatever you want to call them, you have them at a set length, as this will have an effect on a particular point in your rev range.
They're typically at a 'tuned length' that optimizes power output in the higher rev range, for race situations, where you don't often fall out of that range.
The downside to this is that is has a negative effect on power in the lower RPM range, decreasing torque, and therefore decreasing power.
The result is a car that is fairly crappy to drive on the streets, unless you're ringing it out everywhere. Which would cost a lot of gas, and would grab the attention of the Police probably!

I'm by no means an expect on the subject, and theres a lot more to know. As RedMist would say: The answer is Helmholtz!

[rollaholic]

sure does sound nice though