TOMEI CAMSHAFT SET PONCAM SR20DET S14/S15 258-11.50 TA301B-NS08B

PONCAM

EASY TO INSTALL / DIRECT REPLACMENT / HIGH PERFORMANCE

Noticeable, linear gains in performance

Works best with ‘bolt-on replacement’ type turbos

Per-set valve timing

Works with OEM valve springs

Stable idling

DURATION 258

MAX VALVE LIFT (mm) 11.50

MAX CAM LIFT (mm) 7.41

VALVE TIMING CENTER LINE 120 IN

VALVE TIMING CENTER LINE 115 EX

BASE CIRCLE 32.0

STOCK VALVE SPRING COMPATIBLE YES

STOCK VALVE LIFTER COMPATIBLE YES

Cutting edge profile technology

Utilizing cutting edge VALC profile technology, the PONCAM 258 camshafts combine the stable idling and low to midrange performance of a 256 camshaft together with the top end performance of a 264 camshaft.

In addition, they also feature the highest lift amount that’s compatible the stock valve springs for increased flow rate and higher power output.

The PROCAM is designed for large turbo setups and high RPM use, making it ideal for drift, track & drag race applications.

'VALC' profile features- Velocity, Acceleration, Lift, Control

Optimized 'velocity' and 'acceleration'.

Designed for high power setups.

Optimizes engine performance.

Reduced stress/wear on the valve train.

Reduced lash adjuster noise

The VALC profile allows the valves to open faster and for longer. This translates to faster lift and increased area under the 'lift curve' (see fig. ①)

which in turn generates more power. (Greater area under the 'lift curve' = greater air intake)

Unlike the valve opening, the VALC profile ensures that the valves close at a slower rate, helping to prevent common valve train related issues.

Highest lift amount that's compatible with the stock valve springs for increased flow rate and higher power output.

PRECISION MACHINING

LOBE HEIGHT

Machining each lobe to the strictest tolerances allows for smoother and more precise adjustments in valve clearances.

Based on: 12.50mm max lift, Φ32 base circle

SPEC. 40.150mm

ACTUAL (avg.) 40.156mm

DIFFERENCE (avg.) 0.006mm

DIFFERENCE (%) 0.0001%

The greater this 'difference', the more shims and time required to adjust the valve clearance.

PHASE ANGLE

Lobe nose interrelationship (front view)

Strict phase angle tolerances minimizes the risk of valve timing issues and ensures each valve opens and closes precisely.

Our research showed that some camshafts from other manufacturers had more than 5 degrees difference in the phase angle! This makes it near impossible to achieve the correct valve timing.

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