There are oodles of threads about this, but here is the short story of my take...
Speed isnt cheap!
You can get a GOOD tubo kit from
www.designonesystems.com but if you do not NEED air conditioning
i would go with a supercharger for a little less ( I think ) at
http://webhome.idirect.com/~rsm1/fiero_catalog.htm I will not discuss NOS because I personally dont like it, but others love it!
I am guessing the 3.1 is the same block as the 2.8, just bored and stroked with the fancy crankshaft, etc...
[This message has been edited by Greg Piet (edited 10-01-2000).]