You can call Olav, he'll give you a set up over the phone! Nice guy.
The 500 liquids came with super wussy clutching, and the phazers were quite a bit more agressive down low, but the liquid set up would top end a PHazer by lightyears! My vmax500 would run over 100 on the speedo when it was stock, after I got the clutching how I liked it, it would go 0-80 much much faster, and still hit 103 on the speedo.
I did race a piped and ported phazer when mine was stock, and he hung with me till about 50mph, then he started to run out of steam! They're a great sled though.