The valver was fitted with a 4-2-1 to beef up the low down torque as being a revvy 1.8 it lacked low down grunt.
The Williams being a torquey 2.0 had a 4-1 manifold as it lacked top end grunt as it only revved to 6500 rpm.
That makes sense to me.
So fit a valver 4-2-1 manifold to a williams and you will lose top end grunt, but get a bit of an increase in mid range.
Fine
Fit a 4-1 to a valver and it will remove alot of the torque from the midrange and replace it with more top end.
Again that is understandable.
I can see why people fit 4-2-1 manifolds to Williams' to gain mid range torque.
My question is however:
If you fit a 4-2-1 manifold to a cammed Williams , isnt that counter productive, as now the 4-1 manifold would be in it element with all that nice top end cam power and a higher rev limit to take advantage of that 5.5k to 7.2k rev band?
So a cammed Williams would surely benefit more from a 4-1, as if your on the limiter, then you change and keep the revs high the 4-1 is always giving you nice top end. Harder to drive quick, but nontheless a quicker car?