[kwilford]

I recently tried some of Bob's suggestions on my intake manifold, but I have to admit that it hasn't turned out quite as nice as the pictures. I just concentrated on smoothing out some of the square edges and ensuring that the opening matched the carb. I haven't had the nerve (yet) to try the more radical changes, such as grinding right through the mounting bosses and then welding them up. But I am considering adding the "pent-roof" to the base (to improve low end response by reducing the volume). But I will probably get it professionally welded, as I haven't yet learned the art of aluminum welding with my MIG welder. As for power improvement, I am at least a few months from having it back on the road.

I recently saw pictures somewhere of a CIH engine that had a very nice manifold modification, where he actually cut out the square corners (along side the carb mount) and then MIG welded in angled plates to make the airflow smoother into the side runners. If I can find the picture, I'll post it as well.

I have the .zip file of a bunch of pictures of Bob's (now Charles Goin) intake manifold, but it is too big to post. So here is one select photo (at reduced resolution), and I will see if Gary can post the .zip file somewhere.