Originally Posted by kenn_chan

it is, but they are cut at the same time, and as a result you do not radius the leading edge of the side port, you leave it alone, so that when you cut the bridge section the underlying metal will be thick enough for the bridge.

if you cut jsut a street port, then you would(should) radius the edge of the port there to make it flow better.

so in a nutshell if its already been street ported, the chances are that the edge has been radiused and theirfore is thinner and will crack easier making for a very short lived bridge port (housing wise not seal wise)

if you are truly building this just for racing then after you cut the bridge port you would go back and with a sanding roll massage the leading edge to put small radius to help flow, but this is where the difference between experience (shop) and ametuear begins, the shop will know how much they can safely take of for a race, or a street engine.....

kenn

PS to the original poster, if you actually searched for this subject you must not have searched very friggin hard as its covered in about 6 different sub forums.... and comes up with no less than 10 pages of results if you search the entire forum