[Birol]

One of my (Weber) intake manifolds has a crack.
I have a replacement,
but the bottom end of it has a smaller cross section.

As known, the intake manifolds are not all the same.
Compared to the later ones,
the first versions had larger diameters at the bottom.

Now my question, what will happen when I use the manifold
with smaller diameters ?
Less torque in mid section ?
Less power in upper revs ?
Starting problems ?
I would prefer to use the original manifold again,
but the problem is the uncertain repair success of these cracks.
Engine is a tuned, high rev 2,2.

Thanks in advance for any ideas.