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TOMEI

Tomei PROCAM 4B11 EVO10 EX 270-11.0mm

Tomei PROCAM 4B11 EVO10 EX 270-11.0mm

SKU: 146D270110
£248.76
£248.76
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PRODUCT INFO



TYPE APPLICATION DURATION（°） MAX CAM LIFT（mm） IN/EX P/N
ENGINE MODEL IN EX IN EX
R 4B11 CZ4A Evo.10 260 250 10.30 9.80 IN & EX Set 143059

※PRESET VALVE TIMING
※STOCK VALVE SPRING COMPATIBLE
※The best MIVEC performance settings for the 4B11 TYPE-R PONCAMS



APPLICATION DURATION（°） MAX CAM LIFT（mm） IN/EX P/N 備考
4B11 260 10.30 IN 146C260103 PONCAM
250 9.80 EX 146D250098 PONCAM
270 11.50 IN 146C270115
11.00 EX 146D270110
280 11.50 IN 146C280115
11.00 EX 146D280110

FEATURE / SPEC



■ Duration

The best MIVEC performance settings for the 4B11 TYPE-R PONCAMS.
The description beloew was the best MIVEC setting that TOMEI found during the engine bench test.
Actual settings will vary from car to car depending on the cars location and setup.

4B11 PONCAM TYPE-R RECOMMENDED VALVE TIMING
ENGINE SPEED 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000 7500
IN CENTERLINE
SETTING 112°		 ADVANCED 25 25 25 25 25 20 15 8 6 5 0
ADVANCED CENTER 87 37 87 87 87 92 97 104 106 107 112
EX CENTERLINE
SETTING 120°		 ADVANCED 30 30 30 27 24 18 14 7 2 0 0
ADVANCED CENTER 90 90 90 93 96 102 106 113 118 120 120

* The 4B11 Type-R test is based on 100 Octane RON fuel at each RPM range. Advanced settings is required for optimum results.
■ SPEC
ENGINE Duration Max Cam lift (mm) IN/EX Max Valve lift （mm） Cold Valve Clearance
（mm）［±0.01］		 Valve Timing Centerline
(Deg)		 Base circle Note
4B11 260 10.30 IN 10.10 0.20 112 34.4 PONCAM
250 9.80 EX 9.50 0.30 120 .36.4 PONCAM
270 11.50 IN 11.30 0.20 34.4
11.00 EX 10.70 0.30 36.4
280 11.50 IN 11.30 0.20 34.4
11.00 EX 10.70 0.30 36.4


Theme of TOMEI CAMSHAFT

Asymmetrical G-Controlled Profile

When opening the intake valve during high acceleration the G from the camshaft requires to send as much mixture to the cylinder in the shortest time possible. However if the speed is too high it can damaged the Valves, Valve Seats and Valve Springs if the Acceleration G is too high. The Asymmetrical profile design given to the camshafts will allow the Intake and Exhaust Valves to fulfill the target requirement with the wider duration and high lift without damaging the Valve System.

Maximizing the Valves Efficiency



The general purpose of engine tuning is to change the torque characteristics of the engine by changing the cams duration timing and cam lift amount for maximum torque and horse power. However tuning the engine is not only based on that. When going into finer details by maximizing the Valves efficiency is not just about timing and height lift but to also maximize the intake efficiency. The high valve lift allows huge amounts of air in but at the same time it mechanically damages the valve train and gains added friction loss. Longer cam durations and big cam lifts give deliver more power at higher engine speeds but it also gives a rough idle and at low engine speeds. Tomei engineers worked hard to produce camshafts that will deliver a well balanced profile at 1.3-1.5 times more than the stock camshaft.

Quality Control

Every camshaft is carefully built through these production processes. Plus, strict inspection will be given to them and only the highest quality products are shipped.

Surface Coating


Coating the surface of camshaft with manganese phosphate in order to protect from damage even when the camshaft has not lubricated yet. This has done by steeping press process that produces 0.5mm to 15 micromillimeter thin of manganese phosphate coating on its surface to prevent from direct contact with other metal parts while realizing smooth operation.

CNC Super Precise High Speed Grinding



The combination of a ultra high-speed main bearing and diamond grindstone is controlled by the computer. By using the same special-purpose machine as an automaker, high precision grinding is realized though in 1/3 period of time. Consequently, incredible accuracy of profile and remarkable price were realized at the same time.

Wavy Groove Finish by Oscillation Grinding

Wavy groove is curved to the cam profile surface by oscillation during cam grinding process. Oil pool that is formed on the cam profile surface reduces a friction loss and prevents locking.
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