The stock VR38DETT cams are 238 degrees 9.56 mm on the intake, and 248 degrees 9.88 mm on the exhaust.Tomei's base PONCAM setup comes with 256 degrees of duration and 10.25 mm of lift on the intake, and 264 degrees of duration and 10.5 mm of lift on the exhaust side, there are now some other options with more duration and lift for big turbo cars.TYPE | DURATION (°) | MAX CAM LIFT (mm) | IN/EX | MAX VALVE LIFT (mm) | COLD VALVE CLEARANCE (mm) ［±0.01］ | VALVE TIMING CENTERLINE (°) | BASE CIRCLE |
R35 GT-R VR38DETT | 256 | 10.25 | IN | 9.95 | 0.30 | STD | φ35.4 |
264 | 10.50 | EX | 10.17 | 0.33 | STD | φ35.4 |
Tomei also offers their PROCAM setups which have up to 280 degrees of duration, and 11.3 mm lift on the intake, and 11.0 mm of lift on the exhaust.
TYPE | IN/EX | DURATION （°） | MAX CAM LIFT (mm) | MAX VALVE LIFT (mm) | COLD VALVE CLEARANCE (mm) ［±0.01］ | VALVE TIMING CENTERLINE (°) | BASE CIRCLE (Φ) | PART NUMBER | MSRP |
R35 GT-R VR38DETT | IN | 256 | 10.25 | 9.95 | 0.30 | STD | 35.4 | 142047 | $550.00 (USD) |
IN | 264 | 10.50 | 10.20 | 0.30 | STD | 35.4 | 142055 | $550.00 (USD) | |
EX | 264 | 10.50 | 10.17 | 0.33 | STD | 35.4 | 142048 | $550.00 (USD) | |
IN | 272 | 11.30 | 11.00 | 0.30 | STD | 35.4 | 142049 | $550.00 (USD) | |
EX | 272 | 11.00 | 10.67 | 0.33 | STD | 35.4 | 142050 | $550.00 (USD) | |
IN | 280 | 11.30 | 11.00 | 0.30 | STD | 35.4 | 142051 | $550.00 (USD) | |
EX | 280 | 11.00 | 10.67 | 0.33 | STD | 35.4 | 142052 | $550.00 (USD) |
Each set of two cams is priced at $550, or $1100 for a set of 4 camshafts. I can't wait to hear the lumpy idle of a big lift, big duration, big turbo VR38.
Source: GT-R blog
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