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Revs at 100km 

 

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 Post subject: Revs at 100km
Posted: Sat Feb 10, 2007 11:33 pm 
Smokin em up
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Age: 32

Posts: 280

Joined: 22nd Jan 2006

Ride: XB

Location: Hobart
TAS, Australia

Gday,

Im planning on putting a 9"LSD in my XB and later on putting in a toploader. Just after some rpm figures for a C4 (std stall) in 3rd at 100km with a 3.5, 3.7 and 3.9 diff and the same for a toploader in 4th.

Thanks

 

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76XBGS, 383c, custom crow cam, 4V p&p heads, Isky SS Valve+springs, extractors, 2.5"twins, MSD Ignition, Edelbrock intake, Forged bottom end, Barry Grant 750DP, thermo, discs, toploader, Holley fuel pump, SUPERCHARGED!

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Posted: Sun Feb 11, 2007 5:35 pm 
Smokin em up
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Age: 32

Posts: 280

Joined: 22nd Jan 2006

Ride: XB

Location: Hobart
TAS, Australia

Nobody??? Ok how about the ratios of the C4 and the Toploader so I can work it out on the calculator box?

 

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76XBGS, 383c, custom crow cam, 4V p&p heads, Isky SS Valve+springs, extractors, 2.5"twins, MSD Ignition, Edelbrock intake, Forged bottom end, Barry Grant 750DP, thermo, discs, toploader, Holley fuel pump, SUPERCHARGED!

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Posted: Mon Feb 12, 2007 8:45 pm 
Getting Side Ways
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Joined: 18th Dec 2006

Ride: 93 ED sedan

Power: 161 rwkw

Location: Rockhampton
QLD, Australia

Here is the formula to working out speed verses diff ratio's or gear ratio's. You need to know the total outside diameter of the rear tyres for to work. The measurement is in inches. Here is a photo to help you work it out.

 

 

Attachments:
Speed calculator with example.jpg
Speed calculator with example.jpg [ 353.25 KiB | Viewed 29 times ]

 

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http://youtu.be/jJTh9F3Vgg0

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Posted: Thu Feb 15, 2007 1:29 am 
Oompa Loompa
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Location: Melbourne
VIC, Australia

If you think about it it doesn't make any difference if it is the top loader or C4 as top gear in both are 1 to 1 :lol:
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Posted: Thu Feb 15, 2007 6:25 pm 
Getting Side Ways
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Age: 49

Posts: 6467

Joined: 18th Dec 2006

Ride: 93 ED sedan

Power: 161 rwkw

Location: Rockhampton
QLD, Australia

And then with autos you gotta take into account the convertor slip. About 3% for std ones and more for modified ones.

 

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