im not that familiar with these things hanging off the intake. i was told they are called "carburators". need a good book.

actually, ive got the flat top hitachi's, what are good options for carbs. my ITS 240z race car has a rebello motor with SU's, but maybe there are better options?

-james

Here is a little bit of stuff

http://dimequarterly.tierranet.com/articles/tech_weber_tuning.html

http://www.triumphspitfire.com/jets.html

http://www.racetep.com/weberadj.html

Some people have a preference, but overall for most street cars it sounds like there are only minor variances in how one is different than another.