Plenum v Throttle bodies
Discussion
Please can someone explain to me in layman’s terms the advantage of using throttle bodies over a plenum ?
As I understand it running anything other than a mild cam with a plenum runs into difficulties at light throttle openings because dirty air is forced back into the plenum contaminating the next induction cycle. With individual throttle bodies the only cylinder it can contaminate is itself, so there is one obvious benefit allowing you to run a wilder cam and still have some drivability. Presumably it is also easier to accurately control the amount of fuel for each cycle and throttle response is quicker because the butterfly is not some distant point downstream of the plenum.
Are they the main points or am I missing something else ?
As I understand it running anything other than a mild cam with a plenum runs into difficulties at light throttle openings because dirty air is forced back into the plenum contaminating the next induction cycle. With individual throttle bodies the only cylinder it can contaminate is itself, so there is one obvious benefit allowing you to run a wilder cam and still have some drivability. Presumably it is also easier to accurately control the amount of fuel for each cycle and throttle response is quicker because the butterfly is not some distant point downstream of the plenum.
Are they the main points or am I missing something else ?
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