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 Tire size vs gear ratio and rpm 
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Joined: Fri Jun 10, 2005 11:52 am
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Location: Burford
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Post Tire size vs gear ratio and rpm
I am changing gear ratio in my 74 away from the 4:11 especially for the Power Tour.
This link tells you your rpms at 65 mph or 104 km/h with a 1:1 high gear transmission. http://www.intercotire.com/site63.php
for all the overdrive peeps you could use this link to figure out your rpms
http://www.chevymania.com/tech/trans-ratios.htm


Wed Jan 31, 2007 10:04 pm
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Location: Miramichi, NB
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i was thinkin of going to 373 from the 410s as well...


Wed Jan 31, 2007 11:12 pm
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roughskinjrz wrote:
i was thinkin of going to 373 from the 410s as well...

you are lucky cuz you got overdrive
I found this link that can figure out lower profile tires like most of you guys got

http://www.mustangii.org/tech/calculators/ just click on "rpms"


Wed Jan 31, 2007 11:27 pm
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Joined: Sat Mar 19, 2005 8:07 pm
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Location: The big town
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im dropping lower then 373s and stuffing an overdrive in :)

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Thu Feb 01, 2007 1:22 am
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here's another site

www.4lo.com


Thu Feb 01, 2007 8:36 am
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Mr Bastard wrote:
im dropping lower then 373s and stuffing an overdrive in :)

I think I will go 3:42 for the power tour with a tall tire...at least its a stick


Thu Feb 01, 2007 7:15 pm
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Daz wrote:
here's another site

www.4lo.com


no man im not lifting it and putting it on 44's :lol: :lol: :lol:

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9.06@155 mph, small block pump gas with 3.42's bird
8.14@166 mph, big block on 250 shot monza


Thu Feb 01, 2007 10:00 pm
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