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TOMEI Oversize Valves


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TOMEI Oversize Valves

TOMEI Oversize Valves

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High Flow, Improved Durability, for Extreme & High Power Applications!!

Tuned engines require as much fuel mixture to enter the combustion chamber as possible. So a larger diameter design was selected to optimize flow rates. Due to the extremely high temperature conditions experienced in the combustion chamber during high power runs the durability of the valves were also addressed to improve resistance to high heat conditions. The TOMEI oversized valves were designed with the above factors and more so with the careful selection of materials to suit these conditions to the precision in the design and manufacturing processes to maximize the intake and exhaust flow rates will make your engine capable of big power when needed most.

1MM OVERSIZED WAIST SHAPE 

1mm oversized valves were designed for increased flow efficiency on both the intake and exhaust side. The stem has a thinner design for maximizing air flow rate within the port with the reduced air flow resistance. This design with the materials used also allowed for a lighter product as well.

 

PRECISION DESIGN 

To maximize the potential of the valves purpose each factor was addressed during the design process from the surface of the valve head (umbrella section) & the Valve Seat, from Stem to Cotter are all optimized with precision for optimum operating & sealing capabilities when needed most during extreme conditions.

 

SURFACE TREATMENT (INTAKE SIDE ONLY)

Improved Wear Rate
Improved Fatigue Rate
Improved heat resistance
Improved corrosion resistance 

HIGH HEAT RESISTANCE

IN: SUH35 MATERIAL

The SUH35 material which is known for it's high heat resistance properties are usually used for the exhaust side. We chose to use it for the Intake side to suit the the demands of todays users for big power applications and for increased life.

EX: INCONEL 751 MATERIAL
Since the exhaust side can experience extreme exhaust gas temperatures of 1,000 degrees C (1,832 degrees F) during high power use the Inconel 751 material was no doubt the best option to choose to suit serious needs when every detail counts. 

APPLICATION
IN/EX
VALVE
DIAMETER
(mm)
STEM
DIAMETER
(mm)
LENGTH
(mm)
SET
PART
NO.
EACH
PART
NO.
VR38DETT
R35 GT-R
IN 38.15 5.96 95.00 163404 161408
EX 33.15 5.95 92.00 161409
RB26DETT
BNR32/BCNR33/BNR34
IN 35.65 5.97 102.3 163400 161400
EX 31.15 6.94 101.6 161401
SR20DET(R)
PS13/S14/S15
IN 35.15 5.97 101.4 163401 161402
EX 31.15 6.94 102.4 161403
4B11
CZ4A
IN

36.00

5.47 113.25 163405 161410
EX 36.00 5.46 105.90 161411
4G63
EVO4~9
IN 35.00 6.57 109.6 163402 161404
EX 31.50 6.54 109.6 161405
EJ207/255
GDB C~G
IN 37.00 5.96 103.85 163403 161406
EX 33.00 5.96 104.2 161407
* SHEET CUT IS REQUIRED.


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