MANIFOLD (FOR TWIN CARBS)

[MEXY867M]

Does it make any difference or give more power with the manifold being either a short or long manifold and if so which is better for more power,cheers peeps

[petrolhead]

I think the idea is the same as ram pipe length which use the wave effect in the induction system to give more power at a specific rev range.

 

Basically, a compression wave rebounds from a closed intake valve, back along the intake system and gets reflected back towards the intake valve.

 

The shorter your overall intake system (eg ram pipes and trumpet) the shorter the reflection time so you can get the reflected wave to hit the intake valve at higher revs as it is opening in order to force a bit more air/fuel into the cylinder.

 

So to answer your question, shorter manifold/rampipes will be give more power at higher revs. Longer manifold/rampipes will give more power at low revs. which is probably what you want in the Real World!

[MEXY867M]

cheers mate,best I join the real world then