Official Cam and Head Thread
For all your info, questions , comments and concerns.
The Lexus IS300 is a rear-wheel drive, compact luxury sports sedan manufactured by the Toyota Motor Corp. under the Lexus brand and originally sold as the Toyota Altezza in Japan. The model was introduced to slot below the ES in the Lexus lineup and to compete against the BMW 3 Series and the Nissan Skyline/Infiniti G. The first-generation Altezza (codename XE10) was launched in Japan in October 1998, while the Lexus IS200 made its debut in Europe in 1999 and the IS300 in North America in 2001. The "IS" stands for "Intelligent Sport. The 2JZ-GE powered IS series engine, although not as popular as it's turbocharged (2JZ-GTE) brother, is a 3.0 liter inline six cylinder, mounted longitudinally and, unlike the 2JZ-GTE, features Variable Valve Timing with intelligence (VVT-i) on the intake camshaft which provides both improved low-end torque and high rpm horsepower. Also fits the 1998-2005 2nd generation Lexus GS300 (Toyota Aristo)
(Off BC's website)
Plug and play application. Short duration for nice street manners, slight lope at idle. Excellent all purpose spec. OEM spring OK. Shimmed to tight side of OEM. 264's run as reliable on stock ECU as stock cams on stock ECU.
Part#BC0311 Adv. Dur. 264°/264° Dur @ .050 218°/218° Lift (in).344"/.344" Lift (mm)8.74/8.74
Longer duration profile, added rpm potential. Intended for fully built engine. Tuning and ECU mods recommended. Requires upgraded valve springs and retainers.
Part#BC0312 Adv. Dur.272°/272° Dur @ .050 229°/231° Lift (in).375"/.380" Lift (mm) 9.52/9.65
2JZGE (Lexus IS300) Stock
Adv. Dur.248°/248° Dur @ .050 200°/194° Lift (in).337"/.327" Lift(in)8.56/8.31
BC Valve Springs and Retainers
2JZGE Valve Spring & Retainer Kits
Designed for high rpm, BC valve springs are wound from only the highest grade, super clean, chrome silicone alloy and feature proprietary processing procedures for consistent pressures. BC titanium retainers are CNC machined from 6AL4V round bar titanium to exacting tolerances.
2JZGE Stainless Steel Valves
BC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finish under the head.
Specs for valve clearance:
Intake Measurment- .006"-.010"
Exhaust Measurement- .010".014"
* Spec clearances to tight side of OEM spec (when re shimming)
Here is a list of part numbers with shim thickness:
13753-74010 T= 2.50mm (0.0984")
13753-74030 T= 2.55mm (0.1004")
13753-74050 T= 2.60mm (0.1024")
13753-74070 T= 2.70mm (0.1043")
13753-74090 T= 2.70mm (0.1063")
13753-74110 T= 2.75mm (0.1083")
13753-74130 T= 2.80mm (0.1102")
13753-74150 T= 2.85mm (0.1122")
13753-74170 T= 2.90mm (0.1142")
13753-74190 T= 2.95mm (0.1161")
13753-74210 T= 3.00mm (0.1181")
13753-74230 T= 3.05mm (0.1201")
13753-74250 T= 3.10mm (0.1220")
13753-74270 T= 3.15mm (0.1240")
13753-74290 T= 3.20mm (0.1260")
13753-74310 T= 3.25mm (0.1280")
13753-74330 T= 3.30mm (0.1300")
Thanks Leonard_IS300 for info^^
Good info on cam gear settings
BC is Coming out with BC8830 - 2JZ/1JZ Cam Gears - 03/2013
BC valve vs OEM valve
BC valve springs and retainer vs. OEM
Cam Gear install
Servicing 2JZ Videos
More coming soon..............