DressUpBoutique

iTrader: (5)

Today we will be showcasing the VQ35 Expreme Exhaust Manifold from Tomei. This is not a review, it is a product introduction designed to inform you the user with the product design and ability.


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.

MATERIAL:
PIPE - SUS304
FLANGE - STEEL
HEAT SHIELD - SUS304

PIPE DIAMETER (φ)
MAIN 42.7mm
EXIT 60mm

PIPE THICKNESS (mm)
1.5

WEIGHT (kｇ)
6.3 (STD 6.8)

KIT CONTENTS
Exhaust Manifold
Heat Shield
Stick On Heat Insulation
Insulation Tube
Tie Wrap
Engine Side Gasket
Catalyst Side Gasket
Heater Pipe Gasket
Water Pipe O-Ring
Bolt
Flange Nut
Bolt Smooth Paste
Sticker
　


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 PROTOTYPEUNEQUAL 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 EXHAUSTφ42.7→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.

Information Source: Tomei
PDF File: Expreme Exhaust Manifold

If you have any inquiries about this product please PM personally.

0jiggy0

iTrader: (13)

Cool read.

Chef-J

iTrader: (58)

nice.

Ruthless18x

iTrader: (59)

Tomei is sex.

villac

I have an HR 350z. I'm looking towards buying headers in the near future. My question is, how do these compare to the momentum/z1 headers? Also, is there any independent dyno tests? I'm gonna get one or the other and want the best gains possible. Not a lot of people from what i've read have gotten the tomei v2 headers. I'm really curious to see how these compare to other headers like the fast intention long tube headers. Thanks!

Sickboy101

iTrader: (45)

I picked up a set of Tomei V2s and will be installing them in early April... I'll have to re-tune my car, so I'll post up some numbers.

Hotlaprc

iTrader: (3)

Looks like lots of development went into these ....