well I hang around the 'drift scene' here in socal. and i have noticed many of the sr20det tend to burn bearings quite often (using the rwd 17mm bearings) now i noticed guys are not listening to the fsm for clearances on the bearings, being that they are too tight. and now guys are using the fwd 19mm bearings.

Here's a thread that better explains things
http://forums2.freshalloy.com/showthread.php?t=177011