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how to work out gear ratios? 

 

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 Post subject: how to work out gear ratios?
Posted: Sun May 01, 2011 7:54 pm 
Parts Gopher
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Age: 29

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Joined: 30th Jan 2009

Ride: EF Injected Gas T5 Convert

Location: Trafalgar
VIC, Australia

i need a formula to work out gearing i am in the process of working out what gearing i want to to run for my falcon give me me a idea of what pros and cons come with each diff ratio if someone can give me the written out formula and then i will add the numbers as i go

it dont sound hard but having no luck workin it out alone

thanx
STADIC
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 Post subject: Re: how to work out gear ratios?
Posted: Sun May 01, 2011 7:58 pm 
Stock as a Rock
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Ride: XG ute, XT sedan

Location: Crazyburn
VIC, Australia

Not sure where I got this

Attachment:
gear spreadsheet.xls [19 KiB]
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Attachments:
gear spreadsheet.xls [19 KiB]
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 Post subject: Re: how to work out gear ratios?
Posted: Sun May 01, 2011 8:03 pm 
Stock as a Rock
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Ride: XG ute, XT sedan

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Dont worry about line 26 and 27
It was supposed to be top speed per gear with 16" and 17" rims
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 Post subject: Re: how to work out gear ratios?
Posted: Sun May 01, 2011 8:16 pm 
Parts Gopher
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ok i got the spread up and i aint sure how it works i have added all my gear ratios and diff gear now what do i do? it only seems to work in 1st nothin in any other gear when i put in speed (100)
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 Post subject: Re: how to work out gear ratios?
Posted: Sun May 01, 2011 8:36 pm 
Stock as a Rock
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Ride: XG ute, XT sedan

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VIC, Australia

you only put your speed in column B row 14 and it should change the rpm in all the engine rpm row
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 Post subject: Re: how to work out gear ratios?
Posted: Sun May 01, 2011 8:38 pm 
Getting Side Ways
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http://www.fordmods.com/documents.php?d=30

dont know if this will help..

 

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Falcon Build http://www.fordmods.com/post1285079.html#p1285079

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 Post subject: Re: how to work out gear ratios?
Posted: Sun May 01, 2011 11:16 pm 
Getting Side Ways
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jvangent wrote:
http://www.fordmods.com/documents.php?d=30

dont know if this will help..



that one should work fine just enter your orginal rims and tyre and diff ratio then enter your new ones and itll tell you how much your speedo will be out
it all so helps you with what gears to change to if you need to replace the sensor gears
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