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13B-REW for Road Race Car: Tear-Down, Porting, & Build

Here is a motor we recently received from a customer. This motor was rebuilt several years ago and had seen many track miles, including about 15 track days, numerous trips to Deals Gap Rotary Rally, and plenty of “backroad excursions”. It needed a lot of replacement parts and the owner decided to start fresh and purchased a new engine from Malloy Mazda. Once the new motor was in IRP’s hands, we promptly tore it down for porting and upgrading. This engine received NRS 2mm 1-piece ceramic apex seals, a Stage 3+ street port, and modifications to the oil and coolant passages to increase flow.

Photos of the tear down, and build of the new motor can be found after the break.

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