Dude, tell him to check out these places:

www.s20deforum.com yes they discuss the QR25 now and then

www.nissanforums.com a whole section devoted to the car

www.se-r.net only the best nissan site out there with a huge mailing list he can join

Now you have the tools, go put them to use.

Brent Meints
1991 Nissan Sentra SE-R
ACT CLutch
ES inserts and racing mount
Place Racing CAI
KYB struts
Suspension Tech Springs
Vitek Wires
NGK Platinum Plugs
Khumo Ecsta Supra 205/40/16
Rota SubZero Wheels 16x7
B&M short throw
1992 Nissan Pathfinder
4" trailmaster susp lift
3" trailmaster body lift
Dual TM Steering Stabilizer
Idler Arm Brace
Eagle 589 15x8 wheels
BFG MT TA KO 33"x12.5"
Hella 500's
K&N Drop In Filter
Pacesetter Headers