These tests were performed last quarter 2006.  I have been meaning to post a few of our tests on our blog and I’m now just getting around to it.

Car: Mitsubishi Evolution IX MR with 1500miles on Odometer.

Parts testing will be progressive with parts being bolted on taking convenience in mind.
Parts are bolted on without tuning unless specified. When we conducted these tests we tried to take it from the consumers view which was to bolt on the parts and eventually get them all tuned in.

Test are performed on our Mustang Dynamometer MD-1100-AWD-SE

Fuel: 93 octane
Atmospheric Temp: 69Deg
Relative Humidity: 55%
Stock Intercooler was retained of the duration of these tests

Stock Vs Drop In K&N Filter :mitsu:

Stock Vs ARC Intake Box :mitsu:

Stock Vs ARC Intake Box & Greddy Titanium Catback Exhaust :mitsu:

Stock Vs ARC Intake Box, Greddy Titanium Catback Exhaust & DC Sports Downpipe :mitsu:

Stock Vs ARC Intake Box, Greddy Titanium Catback Exhaust, DC Sports Downpipe, Custom Aluminum Upper Intercooler Pipe by Pure Tuning w/HKS BOV & Hallman Manual Boost Controller. The boost controller was still set at stock boost level. The primary purpose for the BC was to smooth out the boost curve which it did. :mitsu:

Stock Vs ARC Intake Box w/Custom Aluminum Intake Pipe, Greddy Titanium Catback Exhaust, DC Sports Downpipe, Custom Aluminum Upper & Lower Intercooler Piping by Pure Tuning w/HKS BOV, Hallman Manual Boost Controller, DN O2 Housing and Exhaust Manifold, Turbo porting, Cusco Oil Catch Can , & ECU Tuning. :mitsu:

Tuning was required at this point since the air fuel was starting to lean out at the bottom end. We wanted to bolt on each part listed on this last test and dyno them one at a time, but time caught up with us and with the customer deadline approaching we bolted on the remaining parts and tuned everything in place.

Final Boost Level was 22psi on 93 Octane

We performed these tests to show that bolting on parts can still result in very good horsepower numbers without tuning. I still feel tuning is still one of the best modifications for any car on any setup, but most people like to purchase a number of parts before they get their car tuned because if they change or upgrade parts after the tune it will need to be tuned again. After performing these tests on this Evo IX I was shocked to see how flat and stable the A/F was on the stock computer up till the last test. I personally feel people don’t give the stock computer on the Evo IX enough credit. The final graph does show the parts with a fully custom tuned computer.

Thanks for viewing,

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