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Crawl Ratio? Hows it done?
Posted: Mon Sep 10, 2007 9:28 pm
by Remydog05
I havent been able to find anything in any search so far>
HOw do you do the calculation to work out crawl ratios and rpms etc??
Posted: Mon Sep 10, 2007 9:33 pm
by chimpboy
Posted: Mon Sep 10, 2007 9:35 pm
by Remydog05
DUH Me
Thanks mate
Posted: Mon Sep 10, 2007 9:58 pm
by Gwagensteve
Pop this in your favourites/bookmark bar.... I have
http://www.novak-adapt.com/knowledge/gearing.htm?
It's the shizzle.
Steve.
Posted: Mon Sep 10, 2007 10:54 pm
by Gwagensteve
Oh, I'll complicate things a bit too. Crawl ratio makes no reference to tyre diameter. for comparison, I like to divide crawl X tyre diameter in inches to get a figure that can be used to compare actual speed over the ground.
Stock sierra - 33:1/26= 1.269
sierra with 5.12s and 33" tyres - 1.27
sierra with 4:1 transfer gear and 33's - 1.67
sierra with 6.4 transfer and 33's: 2.61.... or better than twice the real gearing of a 5.12 car for the same road gearing.
So even though 5.12's offset 33's on road perfectly, offroad a sierra with this setup would have the same gearing as stock (so it would suck)
Just something I play with to get comparisons.
Sorry if I've confused anyone.
Steve.
Posted: Tue Sep 11, 2007 8:24 am
by Tapage
In jsut a side note .. I thought you can drive with a less CR in a diesel engine ( coz have more torque ) than a gasser .. some CR point if you can get your engine rev up at 800 rpm ..
And always depends how much hard core off road you do ..
I forget .. the better way to have better CR, transfer gears ..