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roots arent poor performers... they're just not as efficient as turbo's. which to me dosent matter. but the plus is you get great gains on the whole power curve. turbos are efficient because the compressed gasses from the exhaust spins the turbine, not a belt. the trade off is the boost threshold (lag) because untill you hit the higher rpms the pressure built up isnt enough to make a difference in performance. thats why turbo's have great high end gains, but not much for low-mid rpm range. so its just up to your driving style what you perfer.
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