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New Edge Cobras
Yet another gear thread...
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<blockquote data-quote="Bob Cosby" data-source="post: 4469473" data-attributes="member: 2506"><p>There are a lot of factors that go into gas mileage. When my 99 Cobra was a "bolt-on" car and had the T45 and 4.56s, I would get 24-25 mpg highway. However, I kept the speed down to a steady 70 mph, and used a slightly taller back tire to help kill the gear. </p><p></p><p>With the NMRA F/S motor, I got as much as 28 mpg on one trip - still with the 4.56s. I did this with a T5 that had a .59 5th gear, and again with tires that were somewhat taller. And of course, like above, I kept my highway speed down to 70 mph, which is probably the single biggest contributor of good mileage (60-65 would be even better, but I can't drive THAT slow...LOL).</p><p></p><p>Looking at your username, I assume you have a Vortech on your car? All by itself, that will hurt mileage, as you're always turning the compressor, even if you're not building boost.</p><p></p><p>Bob</p></blockquote><p></p>
[QUOTE="Bob Cosby, post: 4469473, member: 2506"] There are a lot of factors that go into gas mileage. When my 99 Cobra was a "bolt-on" car and had the T45 and 4.56s, I would get 24-25 mpg highway. However, I kept the speed down to a steady 70 mph, and used a slightly taller back tire to help kill the gear. With the NMRA F/S motor, I got as much as 28 mpg on one trip - still with the 4.56s. I did this with a T5 that had a .59 5th gear, and again with tires that were somewhat taller. And of course, like above, I kept my highway speed down to 70 mph, which is probably the single biggest contributor of good mileage (60-65 would be even better, but I can't drive THAT slow...LOL). Looking at your username, I assume you have a Vortech on your car? All by itself, that will hurt mileage, as you're always turning the compressor, even if you're not building boost. Bob [/QUOTE]
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