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Thread: Hwy MPG question
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07-23-2007, 10:53 AM #1
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83 Z28 new project- 98 Formula WS7-sold:(
Hwy MPG question
How much hwy mpg do you think i will lose going from 273's to 323 in a 3400 stall a4. I get now roughly 22-24. Just curious.
TSP Torquer V2 cam, ported heads,fast 90/90 combo, LT's, 3400 stall, magnaflow CB, most other bolt ons, full suspension, t-top and HID conversion
422 RWHP, 384TQ
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07-23-2007, 11:34 AM #2
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Well the stall doesn't matter because at highway speeds it's locked. There's only 300 RPM difference between the two at 68 MPH, so I'd say minimal loss. Last time I checked got about the same as you with a stall and 3.42's.
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07-23-2007, 04:45 PM #3
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Pewter metallic- 2000 Camaro SS
With my 3800 stall and 3:23s I get about 23 MPG on the highway. As long as the convertor has a lockup, they don't make much difference on the highway. Its in town where the convertor will decline your MPG more.
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07-26-2007, 05:56 PM #4
I lost less than 1mpg going from 3:42s to 4:10s in my M6. I wouldn't worry about it. Personally I'd get 3:73s.
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07-27-2007, 05:13 AM #5
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- Minnesota
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83 Z28 new project- 98 Formula WS7-sold:(
Most of the driving I do is highway and one of my friends went from 273's to 373's in his a4 and lost a considerable amount of mileage.
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