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Re: 250 i6 fuel economy w/o sacrificing HP
I would think the 5 speed transmission would help make up for the lower rear end gear ratio.
Quote:
Originally Posted by longbed67
Get yourself a wideband and look at your #'s the 3.07 is to low of a ratio for the h- power and torque curve of a stock 250, thus you must put more foot into the throttle, thus richening the mix and killing fuel economy. I drove through the mountains with a 3.73 and a stock 250 and got 17+ all day long on my trip back from washington. If you want to keep the 3.07 you can but do a cam change, headers, clifford intake, holley 4bbl carb (get it tuned properly), and an hei ignition and you will have about 75-100 more hp and ftlbs torque and you have better fuel econ. visit www.12bolt.com, tom has a lot of info and products at very good prices that will help you out on the 250. |
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71 Chevy C10 Shortbed Stepside. LT1 with
4l60E. Just got back from painter, in assembly now.
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