Nialls supercharged GTi6 - project tidy up

[Toms306]

Doesn't matter as it's getting charged, turbo/super manifolds are always like that. It's NA engines where you need the manifold/bodies as long and smooth as possible.

Not necessarily. It purely depends on the pulse of the engine. Inlet manifolds do not want to be too smooth, otherwise you will suffer a lack of turbulence. This will consequentially reduce the atomisation of the fuel injected, and increase knock. Inlet manifolds are seldom polished, and left quite rough for this reason.

Doesn't matter as it's getting charged, turbo/super manifolds are always like that. It's NA engines where you need the manifold/bodies as long and smooth as possible.

Common misconception, but the fact that you've changed the density of the air coming into the engine doesn't change the fact that pulse tuned manifolds are better. Although it does change the ideal length and shape.

You'll find any race engine that is boosted is running long, gradual runners that are pulse tuned the same as an N/A:

Fair enough, I've learnt something there then.

Not sure why I bothered going to college, it seems most things we were taught there are wrong!

That said though, on road cars (or at least all the ones I've had so far) do have little shitty manifolds with a turbo, and nice long/smooth ones without. I guess its more down to cost and space though, they don't need anything better when they're only aiming for relatively low amounts of power.