Pasted from the Mr2oc.com 's V6 section,posted here cos its ram packed full of technical spec and upgrade info for the 3vz-fe,this guys knows his onions,a cracking read for us 3vz builders.....
http://mr2oc.com/showthread.php?t=140573
Many thanks to "Toysrme" from mr2oc for this priceless insight =D>