Robert brought us his car all the way from Arizona to improve the performance of his 2006 Mitsubishi Lancer Evolution IX GSR. Back in the grand canyon state, Rob was limited to 91 octane which for a turbocharged vehicle is less than optimal for performance. Besides investing in TTP Engineering's experience, he also received a perk of a few octane points as Florida is a state with 93 octane available on tap from the pump.



Rob brought us a handful of mild modifications already installed and had a catalog worth of parts he also wanted installed to complement them. In the camshaft department, he had us install a set of MIVEC GSC S2 camshafts with single springs and retainers which gave the car a slight lope at idle. Upgrading the fuel delivery system, we installed an in tank walbro fuel pump. Rob also had us replace the intake and exhaust manifolds with ported stocker units to allow for some more airflow and sheer volume. An external dump O2 housing was also added to the car along with an AGP 4" FMIC. Some of the parts already on the car before the upgrades were an ETS intercooler piping kit as well as ETS intake with stock IX metal recirculation valve. The Evo IX also had a 3" mandrel bent exhaust system.



With the car strapped down and all parts installed, the 50k+ engine roared to life as we dialed in the existing Forge UNOS manual boost controller. We heard a pop on the first pull, but did not find any loose couplers at the time. Dialing the car in as far as we could comfortable push it, the Evo IX made decent power however seemed to be lacking from either the AFR being reading incorrectly (which happens often with stock frame turbo external dump O2 housings) or from a boost leak somewhere. We worked late, got the car tuned as far as it would go and ended up with a smoothed out, uncorrected dynosheet indicating about 316whp/315tq on the MD AWD 500 dyno.

**Rob came back in today to pay the rest of his invoice and while in the office we ran some courtesy tests on the car such as rechecking cam and crank timing (which checked out perfect) and also a boost leak test. Upon injecting merely 7psi into the charge system, we learned that his throttle body gasket had blown out and would need to be replaced. We ordered on and will be retesting it with a new TB gasket sealing in the boost.