ok so 6:5's it is then
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| Author: | MrRocky [ Mon Jan 03, 2011 7:41 am ] |
| Post subject: | with 31's and 6:5 gears what revs at 110kms |
just assesing my gearing options on my new sierra, i have a tcase with 6:5 gears in and 2 sets of 4.1 diff gears, which one should i use to aim for 3600-3800 rpm at 110 km/phr in 5th as i need to be sitting on 110kms for a few longer trips away this year. cheers mick |
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| Author: | alien [ Mon Jan 03, 2011 7:46 am ] |
| Post subject: | Re: with 31's and 6:5 gears what revs at 110kms |
you'd want standard 3.7 WT diffs, as the 3.7-4.1 is a 12% reduction, and the 6.5's are a 20% reduction on high range. a 31 is 19.2% larger than a factory 26" tyre, so 6.5 and WT diffs would be just lower than factory gearing. Even then though you'd need 5.14 gears to achieve the lower RPMs for 110km/hr... i think mine sits around 3500rpm at 110km/hr |
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| Author: | MrRocky [ Mon Jan 03, 2011 8:11 am ] |
| Post subject: | Re: with 31's and 6:5 gears what revs at 110kms |
ok so 6:5's it is then
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| Author: | birko [ Mon Jan 03, 2011 8:37 am ] |
| Post subject: | Re: with 31's and 6:5 gears what revs at 110kms |
Yep, thats about my revs with 3.7's and 6.5 tc gears. |
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| Author: | Built4thrashing [ Mon Jan 03, 2011 10:00 am ] |
| Post subject: | Re: with 31's and 6:5 gears what revs at 110kms |
Whats 110kms? sierra's only go that fast when on a trailer. |
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| Author: | alien [ Mon Jan 03, 2011 10:03 am ] |
| Post subject: | Re: with 31's and 6:5 gears what revs at 110kms |
dunno about that, was doig 120 in mine just yesterday =P |
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| Author: | zooky08 [ Mon Jan 03, 2011 10:07 am ] |
| Post subject: | Re: with 31's and 6:5 gears what revs at 110kms |
130 in mine along a straight 
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| Author: | 5ierra [ Mon Jan 03, 2011 8:23 pm ] |
| Post subject: | Re: with 31's and 6:5 gears what revs at 110kms |
alien wrote: you'd want standard 3.7 WT diffs, as the 3.7-4.1 is a 12% reduction, and the 6.5's are a 20% reduction on high range.
a 31 is 19.2% larger than a factory 26" tyre, so 6.5 and WT diffs would be just lower than factory gearing. Even then though you'd need 5.14 gears to achieve the lower RPMs for 110km/hr... i think mine sits around 3500rpm at 110km/hr My 1.6 Sierra revs at 3800 - 4000 @ 100 or so with 6.5's, 31's and 3.7's 
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| Author: | neofitou [ Mon Jan 03, 2011 8:40 pm ] |
| Post subject: | Re: with 31's and 6:5 gears what revs at 110kms |
Mines about 4100rpm at 110, and at 5500rpm its much faster. I have 31s, 6.5s and 3.9s, and no weight in the car. |
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| Author: | mighty_vites [ Tue Jan 04, 2011 5:52 am ] |
| Post subject: | Re: with 31's and 6:5 gears what revs at 110kms |
zooky08 wrote: 130 in mine along a straight
if you put a spoiler on it i rekon you could get airborne at that speed, chitty chitty bang bang has nothin on a flying zook 
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| Author: | crewsy [ Wed Jan 05, 2011 1:27 am ] |
| Post subject: | Re: with 31's and 6:5 gears what revs at 110kms |
mine does about 3850 @ 110 with 6.5's + 3.7's + 32's |
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