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Tomei

Poncam Camshafts (Intake/Exhaust), R32-R33

Poncam Camshafts (Intake/Exhaust), R32-R33

Regular price $684.00
Regular price $760.00 Sale price $684.00
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Type

Tomei camshafts have gained world wide recognition for performance, race and streetability. 

Poncam Features

  • Pre-set valve timing
  • Works best with 'bolt-on' type turbos
  • Stable idle
  • Compatible with stock valve springs
  • Noticeable, linear gains in performance

VALC profile features - Velocity, Acceleration, Lift, Control. The VALC profile allows the valves to open faster and longer. This translates simply to faster lift and increased area under the lift curve. This generates much more power than other camshaft profiles (greater area under the lift curve = greater air intake). The VALC profile ensures that the valves close at a slower rate, helping to prevent common valve train related issues. 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. 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)

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.

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

  • 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.
  • Special Order Item - Please Allow Extra Time For Delivery Please Call For Availability
Duration
(° )
Max cam
lift
(mm)
Application
IN/
EX
Single P/N
Set P/N
254
9.15

BNR32/ BCNR33
IN
TA301C-NS05A
TA301A-NS05A
EX TA301E-NS05A
BNR34
IN
TA301C-NS05A TA301A-NS05B
EX TA301E-NS05B
262
9.15
BNR32/ BCNR33
IN
TA301C-NS05B TA301A-NS05C
EX TA301E-NS05C
BNR34
IN
TA301C-NS05B
TA301A-NS05D
EX
TA301E-NS05D
262
10.25
BNR32/ BCNR33
IN
TA301C-NS05F TA301A-NS05L
EX TA301E-NS05L
BNR34
IN
TA301C-NS05F
TA301A-NS05M

 

Duration
(° )
Max cam
lift
(mm)
IN/
EX
Max
valve lift
(mm)
Cold valve
clearance
(mm)[±0.01]

Valve timing
center
Line (° )

Base
circle
(Φ)
Stock
valve spring
compatible
Stock
valve Lifter
compatible
254
9.15
IN
8.70
0.45
110
32.0
EX
8.77
0.38
115
262
9.15
IN
8.70
0.45
110
EX
8.77
0.38
115
262
10.25
IN
           
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