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CAMSHAFT PONCAM RB26DETT IN 254-9.15

parts # TA301C-NS05A
msrp $380.00
engine NISSAN RB26DETT
model NISSAN 34 GT-R, NISSAN 32 GT-R, NISSAN 33 GT-R
main category HEAD RELATED
sub category CAMSHAFT
shipping size 28 x 4 x 4 inch / 71 x 10 x 10 cm
shipping weight 9 lbs / 5 kg
qty in stock 5
note In Stock Now!

Resources

Item Description

■Pre-set valve timing
■Works best with 'blot-on' type turbos
■Stable idle
■Compatible with stock valve springs
■Noticable, linear gains in performance

Duration
(°)
Max
cam
lift
(mm)
IN/
EX
Max
Vlve
Lift
(mm)
Cold
valve
Clearance
(mm)
[+/-0.01]
Valve
Timing
Center
LIine(°)
Base
Circle
(Φ)
Stock
Valve
Spring
Compatible
Stock
Valve
Lifter
Compatible
26210.25IN9.800.4511030.0*1 or *2*3
EX9.87.38115
27210.25IN9.800.45110
EX9.870.38115
282

10.80

IN10.350.45110
EX10.420.38115
29211.50IN11.050.45110*2
EX11.120.38115

Optimized 'velocity' and 'acceleration'.

Designed for high power setups.

Optimizes engine performance.

Higher lift than other profiles of the duration.

Reduced stress/wear on the valve train.

valc_gluf.jpg

1⃣

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)

CAM ACCELERATION CAM ACCELERATION
LOW

HIGH

LIFT LIFT
LOW

HIGH

AIR INTAKE AIR INTAKE
LOW

HIGH

2⃣

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

3⃣

With a conventional direct-acting valve train, the maximum lift is usually determined by the size/diameter of the valve lifter. Selecting a high-lift camshaft without taking this into consideration often results in the camshaft lobes travelling beyond the surface of the valve lifter. This causes the lobe to make contact with the edge of the lifter, damaging both components over time. (see fig. ②)

Therefore, the ideal performance orientated high-lift camshaft needs to have a profile that maximizes lobe travel on the lifter without exceeding the outer edge.

VALC profile camshafts have achieved this ideal by deliberately reducing the maximum cam velocity to limit lobe travel on the lifter surface. (Maximum cam velocity = lobe travel distance on lifter) 

cam_lifter_01_s.jpg
High lift profile without taking lifter size/radius into account.






Compared to standard profile camshafts of the same lift, VALC profile camshafts are able to then then off-set the difference for even greater lift/performance gains

a.jpg