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high altitude

  1. Supercharging using 87(R+M) fuel at high altitudes

    Hey all, There is a large group of S550 GT owners here in Colombia (Southamerica) wanting to supercharge their Coyotes. Want to know your opinions about using any of the most popular setups available (Roush, Whipple) considering that best fuel available at gas stations is 87(R+M) octane. Most...


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