yeah the NT is slightly different, however he said 90 model so i didnt bother with it
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| Author: | SuziBlu [ Fri May 07, 2010 12:10 am ] |
| Post subject: | Gears |
I am either hopeless at searches, or it has never come up. Can someone help please. What are the gearbox ratios and also the transfer ratios in a 1990 sierra. I want to do some calculations on using 5.12 diff rations and speed/engine revs with different tyre sizes. I was going o go 33s, but thinking 35s may be open for me. |
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| Author: | tanshi [ Fri May 07, 2010 12:13 am ] |
| Post subject: | Re: Gears |
gear box is 1st 3.652 2nd 1.947 3rd 1.423 4th 1.000 5th 0.864 Rev 3.466 transfer is High 1.409 Low 2.268 |
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| Author: | SuziBlu [ Fri May 07, 2010 12:17 am ] |
| Post subject: | Re: Gears |
Cool, thanks very much. |
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| Author: | S13RR4 [ Fri May 07, 2010 12:19 am ] |
| Post subject: | Re: Gears |
there is a awesome excel calculation thing in the downloads section, I think DMAC submitted it, its got all the ratios you need and does the calculations for you. but I cant find the downloads section now that everything has changed a little. |
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| Author: | SuziBlu [ Fri May 07, 2010 12:25 am ] |
| Post subject: | Re: Gears |
Sadly since I did an upgrade on my microsoft office, its stuffed, need to get my computer to a doctor to fix up bill gates shit. Cannot use excell. |
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| Author: | tanshi [ Fri May 07, 2010 12:34 am ] |
| Post subject: | Re: Gears |
i think that excel doc might be the one highwaystar made up, i have it on my work PC for when i wanna have a play with gearing |
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| Author: | shep [ Fri May 07, 2010 12:45 am ] |
| Post subject: | Re: Gears |
i think 5th gear is different between sj50 and sj70 |
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| Author: | want33s [ Fri May 07, 2010 1:03 am ] |
| Post subject: | Re: Gears |
WT 5th gear is a fly shit taller (more overdriven) than NT but hardly worth worrying about. This calculator has everything you need... http://www.rocky-road.com/calculator.html |
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| Author: | tanshi [ Fri May 07, 2010 1:06 am ] |
| Post subject: | Re: Gears |
yeah the NT is slightly different, however he said 90 model so i didnt bother with it
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| Author: | tanshi [ Fri May 07, 2010 1:07 am ] |
| Post subject: | Re: Gears |
the one i have has calculator for duals, and all the ratios for all the zuks already in it so i dont need to remember
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| Author: | SuziBlu [ Fri May 07, 2010 1:09 am ] |
| Post subject: | Re: Gears |
Ok, so Im up against a wall. engine revs/gearbox ratio/transfer-box ratio/diff ratio x tyre diameter gives speed, yes, no. |
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| Author: | tanshi [ Fri May 07, 2010 1:16 am ] |
| Post subject: | Re: Gears |
with standard gear box and transfer and 5.1 diffs on 33s you will be doing around 3900 revs at 100ks in fifth on 35s you will be doing 3700 at 100 |
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| Author: | SuziBlu [ Fri May 07, 2010 1:18 am ] |
| Post subject: | Re: Gears |
So 53s are very do-able with 5.12s and a 1.6ltr. Cool. |
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| Author: | tanshi [ Fri May 07, 2010 1:19 am ] |
| Post subject: | Re: Gears |
the only issue you will have is that low range with be complete crap. total reduction in first low is only 42:1 on 35s that will be really really high |
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| Author: | want33s [ Fri May 07, 2010 1:26 am ] |
| Post subject: | Re: Gears |
Dave you might want to look into adding some 4.1 or 4.9 transfer gears as well. 4.1 gears will lower your High range by 12%.. low by 84% 4.9 gears will lower your high range by 16%.. low by 115% The 4.1 gears will up revs to just over 4000 at 100km/h but will give a better than standard low range. Obviously the 4.9 gears will increase revs by a bit more. |
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| Author: | tanshi [ Fri May 07, 2010 1:32 am ] |
| Post subject: | Re: Gears |
i will have 35 or 36s on my LJ project, 1.6 efi, 5.1 diffs, but i will be having 7.4:1 lowrange 106 crawl ratio. 40 odd will be really hard to drive. |
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