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With our Thunder Racing tune loaded into the PCM, our 383-equipped WS-6 spun the dyno rollers hard enough to yield 436.8 hp and 427.0 lb-ft, SAE corrected. This graph is overlayed with our best N/A pull on our stock engine with bolt-ons--indicating that we've already added nearly 100 rwhp! Note the relatively rich AFR, which dips below 12:1 in some places. View Related Article
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