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Old 01-04-2005, 10:06 PM   #1
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Freeways and 4.10's

Can anyone tell me how much my RPM might climb up to at cruising speed on the freeway, 75ish, if I should go 4.10's. Im considering 3.73's just so i dont have to hear my loud *** exhaust on a long drive. I think im right around 2200 rpm now and i believe 3k or 3.5k is when my exhaust gets really pissed off. Thanks for any input
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Old 01-04-2005, 10:33 PM   #2
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you will be around 3k at 75
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Old 01-05-2005, 03:59 PM   #3
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its not nearly as horrid as you think... if you do a TON of interstate you may want to consider 3.73... i have no issues going 75mph.
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Old 01-05-2005, 04:03 PM   #4
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I'm just wondering how will that affect gas milage
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Old 01-05-2005, 04:06 PM   #5
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Quote:
Originally Posted by spadez81
I'm just wondering how will that affect gas milage
it will take away about 2-3 mpg
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Old 01-05-2005, 05:05 PM   #6
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i gained 2 in the city and lost 3 on the hwy with 3.73
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Old 01-05-2005, 07:37 PM   #7
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PRO 5.0 makes a 3.9 too i noticed
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Old 01-05-2005, 07:39 PM   #8
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thats a good looking mustang spectre, those springs and rims do great justice to it
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Old 01-05-2005, 10:15 PM   #9
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4.10's on the interstate will be about 2950 rpms at 80 mph
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Old 01-06-2005, 10:32 PM   #10
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You might loose some mpg but the motor will rev a little higher on the freeway. Should have no problems.

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