TOMEI
Tomei PROCAM RB26DETT IN 260-10.8mm
Tomei PROCAM RB26DETT IN 260-10.8mm
Some items may take 3-5 days to ship.
PRODUCT INFO
TYPE | APPLICATION | DURATION(°) | MAX CAM LIFT(mm) | IN/EX | P/N | ||||
---|---|---|---|---|---|---|---|---|---|
ENGINE | MODEL | IN | EX | IN | EX | ||||
A | RB26DETT | BNR32/BCNR33 | 260 | 252 | 9.15 | 9.15 | IN & EX Set | 143036 | |
BNR34 | 143037 | ||||||||
B | BNR32/BCNR33 | 260 | 260 | 9.15 | 9.15 | IN & EX Set | 143005 | ||
BNR34 | 143018 | ||||||||
R | BNR32/BCNR33 | 250 | 250 | 9.15 | 9.15 | IN & EX Set | 143051 | ||
BNR34 | 143052 |
※PRESET VALVE TIMING
※STOCK VALVE SPRING COMPATIBLE
※Using this product may require additional work on the cylinder head to allow clearance for the hight cam lobe.
The amount of clearance required will vary from each cylinder head.
First check with the camshaft fitted to see how much modification is required on the cylinder head to allow adequate clearance for the high cam lobes.
APPLICATION | DURATION(°) | TYPE | MAX CAM LIFT(mm) | IN/EX | P/N | NOTE | ||
---|---|---|---|---|---|---|---|---|
RB26DETT | 250 | 9.15 | IN | 1421250091 | PONCAM | |||
EX | BNR32/BCNR33 | 1422250091 | PONCAM | |||||
BNR34 | 1426250091 | |||||||
252 | LOW | 9.15 | IN | 1421252091 | ||||
EX | BNR32/BCNR33 | 1422252091 | PONCAM | |||||
BNR34 | 1426252091 | |||||||
260 | LOW | 9.15 | IN | 1421260091 | PONCAM | |||
EX | BNR32/BCNR33 | 1422260091 | PONCAM | |||||
BNR34 | 1426260091 | |||||||
MID | 10.25 | IN | 1421260102 | |||||
EX | BNR32/BCNR33 | 1422260102 | ||||||
BNR34 | 1426260102 | |||||||
HI | 10.80 | IN | 1421260108 | |||||
EX | BNR32/BCNR33 | 1422260108 | ||||||
BNR34 | 1426260108 | |||||||
270 | MID | 10.25 | IN | 1421270102 | ||||
EX | BNR32/BCNR33 | 1422270102 | ||||||
BNR34 | 1426270102 | |||||||
HI | 10.80 | IN | 1421270108 | |||||
EX | BNR32/BCNR33 | 1422270108 | ||||||
BNR34 | 1426270108 | |||||||
280 | HI | 10.80 | IN | 1421280108 | ||||
EX | BNR32/BCNR33 | 1422280108 | ||||||
BNR34 | 1426280108 | |||||||
SUPER HI |
11.50 | IN | 1421280115 | |||||
EX | BNR32/BCNR33 | 1422280115 | ||||||
BNR34 | 1426280115 | |||||||
290 | SUPER HI |
11.50 | IN | 1421290115 | ||||
EX | BNR32/BCNR33 | 1422290115 | ||||||
BNR34 | 1426290115 |
※Adjust Shims may be required for some models.
※Tomei Lifters are required for MID, HI, SUPER HI types.
※Uprated Valve Springs are also required for MID, HI, SUPER HI types.
※Using this product may require additional work on the cylinder head to allow clearance for the hight cam lobe.
The amount of clearance required will vary from each cylinder head.
First check with the camshaft fitted to see how much modification is required on the cylinder head to allow adequate clearance for the high cam lobes.
FEATURE / SPEC
■ Type A
Designed to best suit the stock & N1 turbos for optimum performance balance of low to mid range torque.
The Exhaust cams duration was reduced to maintain best idling.
■ Type B
By extending the duration timing compared to the Type A Poncams, both response and peak power was raised and these camshafts best compliment the mid to large size turbo charged applications.
■ TYPE R(for Stock Cat. Equiped Cars)
The Type R camshafts were designed due to popular demand from end users who are looking at upgrading the performance potential of their GTR while staying within the limits of recent street legal requirements.
Recent laws on emissions and exhaust noise was made stricter in Japan so to have a quieter car by running smaller exhaust systems raises the exhaust back pressure which greatly reduces the response and hinder performance. Our engineers then designed these Type R camshafts to suit the needs of those who need to keep such setup and benefit with performance gains.
TYPE A | TYPE B | TYPE R | ||
---|---|---|---|---|
RECOMMENDED SETUP | CATALYTIC CONVERTER |
Sports Catalytic Converter or Straight Pipe |
Sports Catalytic Converter or Straight Pipe |
Sports Catalytic Converter or Straight Pipe |
TURBO | Stock or Larger Bolt On Type |
N1 or Full Turbo Kit Upgrade |
Stock or N1 Turbos | |
Peak Power Comparison (for Stock Cat. Equiped Cars) |
405 ps | 406,33 ps | 404,65 ps |
■ 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 |
---|---|---|---|---|---|---|---|---|
RB26DETT | 250 | 9.15 | IN | 8.70 | 0.45 | 110 | 32 | PONCAM |
EX | 8.77 | 0.38 | 110 | PONCAM | ||||
252 | 9.15 | IN | 8.70 | 0.45 | 110 | |||
EX | 8.77 | 0.38 | 115 | PONCAM | ||||
260 | 9.15 | IN | 8.70 | 0.45 | 110 | PONCAM | ||
EX | 8.77 | 0.38 | 115 | PONCAM | ||||
10.25 | IN | 9.80 | 0.45 | 110 | 30 | |||
EX | 9.87 | 0.38 | 115 | |||||
10.80 | IN | 10.35 | 0.45 | 110 | ||||
EX | 10.42 | 0.38 | 115 | |||||
270 | 10.25 | IN | 9.80 | 0.45 | 110 | |||
EX | 9.87 | 0.38 | 115 | |||||
10.80 | IN | 10.35 | 0.45 | 110 | ||||
EX | 10.42 | 0.38 | 115 | |||||
280 | 10.80 | IN | 10.35 | 0.45 | 110 | |||
EX | 10.42 | 0.38 | 115 | |||||
11.50 | IN | 11.05 | 0.45 | 110 | ||||
EX | 11.12 | 0.38 | 115 | |||||
290 | 11.50 | IN | 11.05 | 0.45 | 110 | |||
EX | 11.12 | 0.38 | 115 |
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. |
Factory Camshaft specs
Engine | Model | Type | Cam Duration/IN (°) | Cam Duration/EX (°) | Cam lift/IN (mm) | Cam lift/EX (mm) | Pre-Set Valve Timing/IN (°) | Pre-Set Valve Timing/EX (°) | NVCS | NVCS range(rpm) |
---|---|---|---|---|---|---|---|---|---|---|
RB26DETT | BNR32 | Solid | 240 | 236 | 8.58 | 8.28 | 113 | 125 | None | |
BCNR33 | ||||||||||
BCNR33 N1 | 120 | |||||||||
BNR34 | 117 | 121 | ||||||||
BNR34 N1 |