|
Yeah the throttle body size does help but you definitely want as much plenum volume as you can.
Think of it this way the plenum has 2 jobs:-
1. to distribute the a/f charge to the cylinders.
2. to act as an air spring of sorts to ensure that the charge in the plenum is even along its length and each cylinder get a fair share.
Remember any engine is limited by it's worst cylinder.
The point is you dont want to be drawing that charge from the intake it should already be there in the plenum.
Example - 3 litre v10 Ferrari engine, one of the best developed production engines in the world has like a 6 litre plenum.
|