Cats: Thanks everyone for offering all the suggestions. Lots of great suggestions too.
I had one more thing to ask. I didn't want to ask too many things at once. Well, actually I just forgot. This is concerning the inner edge of the port on the manifold. I have two sets of manifolds I'm preparing. One TS manifold on a stock TS engine. One Nord on a prepared Dan Marvin head. Engines are all in the car, so I don't have the liberty of checking the smoothness of the mating area. Does it make sense to do any grinding on the inside of the manifold at the mating surface on either of these? I wonder how exact the head port and manifold port are to each other. I wanted to alleviate the possibility of a step on the exhaust side. I was wondering if the head prep on the Nord engine has widened the port at all (I can't remember exactly the prep, but it may have been just a polish on the exhaust since I did not increase the valve size there). Since the TS is stock, I was wondering if a little grinding wouldn't help anyway, introducing a negative step. I was thinking about using one of those tri-stone things you put on a drill and taking off a few mm of this edge. I don't want to do anything stupid, so I would never attempt it before asking those who know more than me. I have not even purchased this stone attachment. I have never heard anyone discuss this, so I am prepared for the wrath of the digest. Fire away if this is a bad idea or just not worth it. Thanks, Stefano -- to be removed from alfa, see http://www.digest.net/bin/digest-subs.cgi or email "unsubscribe alfa" to [email protected]
