The Targa Newfoundland Scion Racing FR-S is running in the Modern group at this year’s 5-day tarmac rally, meaning Dave and Peter had to keep the engine naturally aspirated. As you’ll see in Episode 5 of their YouTube series, they started with an AEM intake and a HKS single-exit exhaust system.
What you won’t see in this video (since the parts hadn’t arrived yet), are the further additions of a HKS air intake duct, which bolts in place of the smaller factory intake duct and feeds fresh air into the AEM airbox, and Crawford Performance billet power blocks, which lengthen the intake manifold runners and thus increase volume and mid-range power in the process.
In a perfect world Dave and Peter would have dyno tested all these mods in a step-by-step fashion, but because of time constraints they’ve left the dyno tuning until the end. You will, however, see a dyno testing video soon, where the factory exhaust manifold and front-pipe (which includes the secondary catalytic converter) are replaced with JDL Auto Design racing headers and a freer-flowing front-pipe.
Dave and Peter fly to Newfoundland tomomrrow to meet up with their FR-S on Saturday for Targa registration and tech inspection, but we have a few more updates for you before the racing starts on Monday.
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