Test Models | Striving for Perfection | Bench Test | Road Test | Lighter | Unique Design
 
 


Through extensive testing, trial and error we have tried with various pipe sizes and combinations to find the best possible results for the highest possible performance in all RPM ranges.
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The Engine Dyno graph on the left shows the overall perforamnce increase throughout all RPM ranges to give the overall improved performance results. This was achived with extensive engine bench testing time from our R&D.

This is the results based on the Z33 (350Z) exhaust manifold (headers) + straight front pipes which brings out the overall higher performance throughout the entire RPM range.


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Here at Tomei we have 2 engine Dyno rooms dedicated for heavy testing and research and development. Day in and day out we just test and build daily with our passion. From running the bench testing it is the best way to find the efficiency of the engine through all power ranges whilst pushing the engines durability to the limits.

The EXPREME Exhaust for EVO 9 under extreme testing.
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All data is logged and tested for accruate testing and attention to detail on the products efficiency for finding the best results.
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Case Example: Lancer Evolution where the exhaust is situated at the front of the car, every bit of weight reduction there helps a lot in improving the handling of the cars cornering characteristics. Every bit helps for you to gain that extra edge over your rivals.
Pictured:@EVO Outlet (Dump Pipe)
Genuine@3.05kg
TOMEI POWERED EXPREME@1.75kg
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Another example of the product concept designs that TOMEI has developed for the best performance and looks, our Exhaust system for the Subaru Impreza WRX models GDB C/D/E/F.
Pipe Diameter.

A Main Pipe
38.0mm φ
From the exhaust port up to the gathering section (B), the pipes diameters are 38ƒΣthis has sucessfully raised the exhaust flux for a smoother flow.

B Gathering Pipe 42.7mm φ
By making it wider helps with flow without impairing torque. This size was found to be the ideal pipe diameter which gives the best improvement of power.

C

Turbo Support Pipe 42.7mm φ
This helps the exhaust flow from the turbine, by improving this section you can then maximise the turbos potential efficiency.

D Outlet 75.0mm φ
Optimised design for increased performance and efficiency.

E

Following the Catalizer 75~70~65mm φ

To have the power & torque be more better balanced a pipe with 3 stages of diameters was adopted.


Angles in the bend

f Left Block Side
Increased efficiency and designed to be made as straight as possible.

g Right Block Side
The right section extractors have been specially designed for optimum performance whilst preventing the thermo heat from effecting the oil pan (sump) temperature.

h

Merging Section
The designates the confluence point as possible limit acute angle, keeps flowing together the exhaust of each bank smoothly.

i Following the Outlet Pipe
Attention to detail and calculating the best ways to maximise exhaust flow efficiency, we have taken all aspects into consideration such as clearance and operating efficiency of each section.

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Copyright (C) 2009 TOMEI POWERD,Inc. All Rights Reserved.
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