Somethings not stock then
Steve.
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| Speedo reading Q's https://www.auszookers.com/forum/viewtopic.php?f=5&t=22374 |
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| Author: | barney7779 [ Sun May 29, 2011 12:17 pm ] |
| Post subject: | Speedo reading Q's |
Hey guys Fitted up the 1L transfer to my sierra today and just as a test gave it a run with the tail shafts out Its a 1.6L with standard sierra 5 speed At 4000rpm the speedo was reading 90kmh in 5th gear Does this sound right???? Have not drove the car even before the conversion so cant compare to what the speedo used to read. Car will be running 31's when finished, just using the 1L transfer till i can get some more coin for a set of gears Cheers |
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| Author: | SuziBlu [ Sun May 29, 2011 6:49 pm ] |
| Post subject: | Re: Speedo reading Q's |
What tyres are you running, if stock, sounds fair. |
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| Author: | Gwagensteve [ Sun May 29, 2011 10:28 pm ] |
| Post subject: | Re: Speedo reading Q's |
The speedo drive is after the transfer reduction, so only diff gears or tyre size make any difference to the accuracy of the speedo. Sorry if you already knew that, but lots of people overlook it. Yes, that's about right. Once you put the 31's on, you'd be traveling at nearly 110km/h with the speedo showing 90km/h and the engine spinning 4K. Steve. |
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| Author: | SuziBlu [ Sun May 29, 2011 11:04 pm ] |
| Post subject: | Re: Speedo reading Q's |
Steve, on the Maruti I have, everything stock as far as I know, except the 1.3l and 5 speed box in place of the 1l and 4 speed, at 100ks by the speedo in doing around 95ks (gps speed), on 31s. |
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| Author: | Gwagensteve [ Sun May 29, 2011 11:08 pm ] |
| Post subject: | Re: Speedo reading Q's |
Somethings not stock then
Steve. |
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| Author: | SuziBlu [ Sun May 29, 2011 11:18 pm ] |
| Post subject: | Re: Speedo reading Q's |
Yea I know, but without knowing how to do the sums, or the box ratios, its a mystery. The bloke I bought it from bought it off another, an has no history. It was running on 215R 15s, can't get them in OZ anymore, well, me mate at bridgstone tells me so, an as 1 was rooted, I put 31s on. Around 3,500rpm at 100ks on the speedo. |
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| Author: | Gwagensteve [ Sun May 29, 2011 11:29 pm ] |
| Post subject: | Re: Speedo reading Q's |
I'd say it has a 1.3 transfer case, or something like that. Steve. |
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| Author: | JrZook [ Sun May 29, 2011 11:46 pm ] |
| Post subject: | Re: Speedo reading Q's |
Gwagensteve wrote: The speedo drive is after the transfer reduction, so only diff gears or tyre size make any difference to the accuracy of the speedo. Sorry if you already knew that, but lots of people overlook it.
Yes, that's about right. Once you put the 31's on, you'd be traveling at nearly 110km/h with the speedo showing 90km/h and the engine spinning 4K. Steve. Correct! But what about the speedo drive gear ratio at the back of the transfer that coincides with the diff ratio the vehicle came out with? i dont think all speedo drive ratio's are teh same from 1l-1.3nt-1.3wt. Dan |
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| Author: | SuziBlu [ Mon May 30, 2011 12:35 am ] |
| Post subject: | Re: Speedo reading Q's |
Gwagensteve wrote: I'd say it has a 1.3 transfer case, or something like that.
Steve. Isn't the 1.3l transfer gears higher than the 1l, if so, if it had the 1.3l transfer, wouldn't that mean it goes faster, not slower ? |
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| Author: | JrZook [ Mon May 30, 2011 12:41 am ] |
| Post subject: | Re: Speedo reading Q's |
SuziBlu wrote: Gwagensteve wrote: I'd say it has a 1.3 transfer case, or something like that. Steve. Isn't the 1.3l transfer gears higher than the 1l, if so, if it had the 1.3l transfer, wouldn't that mean it goes faster, not slower ? The gear ratio's are numerically lower in the 1.3, you will go faster compared to the 1.0. |
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| Author: | SuziBlu [ Mon May 30, 2011 1:11 am ] |
| Post subject: | Re: Speedo reading Q's |
Yea exactly as I was thinking. In my case, id say it has a set of some form of reduction transfer gears. |
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| Author: | royce [ Mon May 30, 2011 1:18 am ] |
| Post subject: | Re: Speedo reading Q's |
if you put a transfer with 1.3 WT SPEEDO DRIVE gears in a 1 litre with 31's, the speedo reads spot on 
1.3 NT would be very close as well |
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| Author: | barney7779 [ Mon May 30, 2011 1:32 am ] |
| Post subject: | Re: Speedo reading Q's |
SuziBlu wrote: What tyres are you running, if stock, sounds fair.
Had no tail shaft in, just wanted to see what the speedo read at about 3800-4000rpm. |
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| Author: | barney7779 [ Mon May 30, 2011 1:40 am ] |
| Post subject: | Re: Speedo reading Q's |
Gwagensteve wrote: The speedo drive is after the transfer reduction, so only diff gears or tyre size make any difference to the accuracy of the speedo. Sorry if you already knew that, but lots of people overlook it.
Yes, that's about right. Once you put the 31's on, you'd be traveling at nearly 110km/h with the speedo showing 90km/h and the engine spinning 4K. Steve. I sort of understand what what your saying about the speedo drive but still cant quite get my head around it. So a 1l transfer speedo drive turns the speedo cable at the same RPM at a given speed as a 1.3L transfer? |
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| Author: | JrZook [ Mon May 30, 2011 1:50 am ] |
| Post subject: | Re: Speedo reading Q's |
barney7779 wrote: Gwagensteve wrote: The speedo drive is after the transfer reduction, so only diff gears or tyre size make any difference to the accuracy of the speedo. Sorry if you already knew that, but lots of people overlook it. Yes, that's about right. Once you put the 31's on, you'd be traveling at nearly 110km/h with the speedo showing 90km/h and the engine spinning 4K. Steve. I sort of understand what what your saying about the speedo drive but still cant quite get my head around it. So a 1l transfer speedo drive turns the speedo cable at the same RPM at a given speed as a 1.3L transfer? No because the 1L diffs have a different ratio (4.11) to the 1.3's (3.7 or 3.9). Given the same tire and same speedo cluster the speedo drive gear ratio is different to compensate for this. |
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| Author: | royce [ Mon May 30, 2011 1:53 am ] |
| Post subject: | Re: Speedo reading Q's |
barney7779 wrote: Gwagensteve wrote: The speedo drive is after the transfer reduction, so only diff gears or tyre size make any difference to the accuracy of the speedo. Sorry if you already knew that, but lots of people overlook it. Yes, that's about right. Once you put the 31's on, you'd be traveling at nearly 110km/h with the speedo showing 90km/h and the engine spinning 4K. Steve. I sort of understand what what your saying about the speedo drive but still cant quite get my head around it. So a 1l transfer speedo drive turns the speedo cable at the same RPM at a given speed as a 1.3L transfer? yes, for any given speed, the cable spins the same amount of revolutions per km regardless of model because different models have different diff gears that will effect this there are different ratios in the speedo drive |
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| Author: | zooky08 [ Mon May 30, 2011 2:57 am ] |
| Post subject: | Re: Speedo reading Q's |
barney7779 wrote: SuziBlu wrote: What tyres are you running, if stock, sounds fair. Had no tail shaft in, just wanted to see what the speedo read at about 3800-4000rpm. |
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| Author: | JrZook [ Mon May 30, 2011 3:08 am ] |
| Post subject: | Re: Speedo reading Q's |
zooky08 wrote: wouldnt Your speedo won't be incorrect any way cos you wouldn't have any load on the transfer or the engine?
Errrrrrrrrrrr dude do you just want to have a bit more of a think about that..... 
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| Author: | zooky08 [ Mon May 30, 2011 3:12 am ] |
| Post subject: | Re: Speedo reading Q's |
I ment rpm not speedo Am I still wrong? Gearing confuses me to much |
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| Author: | SuziBlu [ Mon May 30, 2011 3:17 am ] |
| Post subject: | Re: Speedo reading Q's |
3,000 revs, is 3,000 revs, be it out of gear revs, or towing a caravan up a dirty great big hill in low range 1st gear and struggling to hold the revs. Load has nothing to do with it, load is an internal combustion and strain thing. If you are an auto driver, you will see torque slippage so higher revs for the same speed, but not in a manuel. |
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| Author: | zooky08 [ Mon May 30, 2011 3:27 am ] |
| Post subject: | Re: Speedo reading Q's |
I'll just keep my mouth shut I think Sorry |
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| Author: | SuziBlu [ Mon May 30, 2011 3:31 am ] |
| Post subject: | Re: Speedo reading Q's |
No such thing as a stupid question, just stupid answers. If you don't ask, how are you going to learn ? |
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