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TOMEI EXPREME EXHAUST MANIFOLD VQ35DE VER.2
The NA Sports Feel Has Evolved To An All New Level.
The 1st Version design had the targets of “Sharp throttle response”, “Sports engine enjoyment” & “True race exhaust sound”. The new version 2 design has all those target aspects met with the additional target of increased power gains. The designs were made and time painstakingly tested both on the engine bench Dyno in a controller environment and on the car in real life uses in the Z Masters race series in Japan. With these tests we found to have excelled in additional performance gains from the previous 1st Version model.
PIPE DIAMETER (φ)
PIPE THICKNESS (mm)
MAIN 42.7mm EXIT 60mm
6.3 (STD 6.8)
Stick On Heat Insulation
Engine Side Gasket
Catalyst Side Gasket
Heater Pipe Gasket
Water Pipe O-Ring
Bolt Smooth Paste
EXHAUST MANIFOLD Ver.2
■THE MOST POWERFUL ENGINE IN THE Z-MASTER RACE SERIES!!
EXTENSIVE REASEARCH & DELVEOPMENT
1. LENGTH COMPARISON TEST
The equal length shows smooth torque results mid rage and the unequal length shows more power up high in the power band. The equal length also delivers a much better race engine sound. The unequal length shows room for power gains up top with more R&D.
EQUAL LENGTH PROTOTYPE
UNEQUAL LENGTH PROTOTYPE
STANDARD LAYOUT EQUAL LENGTH CHOSEN
2. OPTIMUM DISTANCE TO MERGE SECTION
The 3 Test Stages of finding the optimum distance to the merge section.
(1) Comparison of 370mm and 620mm The 620mm length design showed the power band peaked around the 4000 RPM area.
(2) Comparison of 90mm, 240mm and 370mm The shorter 90mm and 240mm showed the power decrease before the 6000 RPM range. * From the various test results obtained we decided with the 450mm length which is in between the 370mm~ 620mm area.
(3) Additional tests was done with length ranges between 370mm to 620mm at 400,450. 500 & 550mm sizes to find any extra gains.
From the additional extensive testing we found the 450mm delivered the best results.
EQUAL LENGTH PROTOTYPE φ42.7 450mm
EQUAL LENGTH PROTOTYPE 620mm
THE 450mm LONG TYPE WAS CHOSEN
3. PIPE DIAMETER & MERGE SECTION
Increasing the exhaust pipe diameter is will increase performance gains but too large will cause power loss. We found after numerous tests that the φ42.7mm size made best results.
φ42.7 BENCH DYNO TEST EXHAUSTト
φ42.7→φ45.0 BENCH DYNO TEST EXHAUST
These test results show how we tested and why we chose the exhaust manifold product designs of equal length φ42.7mm L=450mm.
■ STOCK COMPARISION
With the best layout design there was an additional 0.5kg weight savings gained from our new design.
Pipe Material TIG Welded
Pipe Main Diameter
Pipe Wall Thickness
With the new performance design layout it is hard to use the thermal bandage to control the heat in the engine bay. So for added performance gains we have also added a heat shield and thermal protector and flexible thermal tube cover. These accessories are all included in the kit and help reduce performance robbing heat.
■ EXHAUST FLOW OPTIMZED
For the optimum performance layout the pipe bends are designed to maximize exhaust flow efficiency. The merging section joint angles have all been flow tested and with the smooth pipe layout, performance is maximized with this bolt on kit.
■THE EXPREME PERFORMANCE
Instant throttle response which delivers a real race engine experience and feel.
Improved mid range torque. More torque gives your 3500cc engine more grunt and more fun.
More power in higher RPM range which makes a big difference between the factory settings and our EXPREME upgrade.
The 1.5mm thin 304 stainless steel will deliver the harmonics of a dry racing sound. The feeling will exceed the famous Ferrari F355.
The super lightweight design flange and 1.5mm pipe were adopted for the optimum performance benefits. The end result was a reduction of 9.1kg. (When combined) the lighter weight will affect the cars handling with a lighter front end will make it easier whilst turning.
■ TRACK BRED
The Z33 350Z will shows its true performance capability when you use the TOMEI EXPREME exhaust manifold & straight front pipe combination.