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Jeep 4.0 Engine Upgrades - Powerplay Photos

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1. To generate data that we could actually use, we first had to get some baseline dyno numbers. To do this we simply drove down to our local dyno facility and made three runs with the original equipment intact. No aftermarket modifications existed when we generated this data. Peak power was 126.4 hp @ 4,474 rpm and 176 lb-ft of torque @ 2,385 rpm-not bad, considering this Jeep had only 25,000 miles on it and an automatic transmission.
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