Speed Academy Turned a Junkyard K-Swap Into a 530-Whp Integra
A high-mileage K20Z3 with completely stock internals, a Precision 6062 turbo, and a target that got blown past on the dyno.
Peter Tarach and Dave Pratte of Speed Academy set out to answer a fairly blunt question: could a stock-internal, junkyard-sourced K20Z3 survive 500 horsepower at the wheels dropped into a rusty, neglected DB8-chassis Acura Integra GS-R sedan? The engine had real mileage on it and zero rebuilt internals — no forged rods, no forged pistons, just whatever Honda originally put in it.
The supporting cast did the heavy lifting: a Precision 6062 turbocharger, K-Tuned swap hardware, a maxed-out fuel system, titanium intercooler piping fabricated by GT Customs, and a custom exhaust with a valve-controlled cutout, backed by a suspension and brake refresh on the roughly 2,700-pound sedan.
On the dyno, the car didn't just hit the 500-whp target — it peaked at 530 whp at 18.5 psi of boost, with the stock-internal K20 holding together through the pull. It's a build whose real news isn't the horsepower number, which plenty of built K-series engines exceed; it's that a completely un-rebuilt junkyard engine got there at all.
