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HarmLessSolutions
617 posts

Ultimate Geek


  #2945279 22-Jul-2022 14:49
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richms:

 

I would rate the tyres on a leaf that I test drove as dangerous as the piece of crap supercats that a tyreshop assured me were a good tyre yet appeard to have the grip of a non-stick frypan when on a wet road.

 

This review would tend to support your experience: https://tirewheelguide.com/tires/compare/bridgestone-supercat/kumho-ecowing-es31/





https://www.harmlesssolutions.co.nz/


 
 
 

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Technofreak
6224 posts

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  #2945285 22-Jul-2022 15:07
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HarmLessSolutions:

 

Technofreak:

 

You've lost me with your lack of competency comment. That site gives a very good comparison of important characteristics between similar tyres unlike some sites that just rank tyres based on reviews from anonymous keyboard warriors. Some people only think of road noise, or mileage and the fact that you're more likely to slide off the road with that tyre is never considered yet they rank it high.

 

My comment was in regard to the evidence of expertise of the website was lacking. A few graphs are easy to generate and the website has a copyright 'stamp' dated 2022 so no real history to base their competency on.

 

As you say we've been satisfied with the Wattruns so expect the Ecowings will perform to expectations. After all the Leaf is our second car now with its main use being rural/urban road travel for shopping and the like so not a highway cruiser by any means and tyre performance expectations are based on that.

 

We've recently taken delivery of a Polestar2 so when that is up for tyre replacements we'll be more discerning in regard to what we fit to it, and expect a bigger bill to do so.

 

 

 

 

The results on that website came from these guys. https://www.testworld.fi 

 

Most websites that are up to date will have the current year date like you saw. It's generally old or unmaintained websites that have a year date in the past.

 

I'd argue you need good tyres on rural/urban roads as much as on the highway. It's these roads where you do more sharp turning, more stops and have more hazards to contend with and more likely to drive through puddles of standing water. 





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GV27
5552 posts

Uber Geek


  #2946962 27-Jul-2022 15:05
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40kw Leaf Drivers, how does your estimated range change if you drive your Leaf more aggressively?

 

I know it's all smoke and mirrors anyway but has anyone experienced the GOM showing a better outcome with some more conservative driving?




HarmLessSolutions
617 posts

Ultimate Geek


  #2946963 27-Jul-2022 15:10
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GV27:

 

40kw Leaf Drivers, how does your estimated range change if you drive your Leaf more aggressively?

 

I know it's all smoke and mirrors anyway but has anyone experienced the GOM showing a better outcome with some more conservative driving?

 

It doesn't matter if it's a Leaf or any other EV, if you drive like you stole it your range is going to plummet same as for a fossil fueler. The difference with a Leaf's GOM is that it calculates ongoing battery range based on the immediately preceding rate of discharge.





https://www.harmlesssolutions.co.nz/


GV27
5552 posts

Uber Geek


  #2946970 27-Jul-2022 15:21
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HarmLessSolutions:

 

It doesn't matter if it's a Leaf or any other EV, if you drive like you stole it your range is going to plummet same as for a fossil fueler. The difference with a Leaf's GOM is that it calculates ongoing battery range based on the immediately preceding rate of discharge.

 

 

Figured as much. I have a heavy right foot when I'm driving hobby cars but I figure it may normalise if I baby it like I do with my daily drivers.


tripper1000
1550 posts

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  #2946993 27-Jul-2022 16:06
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It may not all be down to your lead-foot - don't forget it is winter and if you've been using the heater your GOM range will be reduced from that as well. If/when you try a conservative driving phase, turn the A/C and Heater off. 

 

I have a 24kw, so the GoM-algorithm may/probably differs to a 40kw, but I have reset the km/kw meter while stuck in slow moving traffic on a flat motorway and the GoM has (temporarily) produced range estimates almost double the factory-new range of the car. Same thing if it is reset it at the top of a long down hill road.


HarmLessSolutions
617 posts

Ultimate Geek


  #2947017 27-Jul-2022 17:13
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tripper1000:

 

It may not all be down to your lead-foot - don't forget it is winter and if you've been using the heater your GOM range will be reduced from that as well. If/when you try a conservative driving phase, turn the A/C and Heater off. 

 

I have a 24kw, so the GoM-algorithm may/probably differs to a 40kw, but I have reset the km/kw meter while stuck in slow moving traffic on a flat motorway and the GoM has (temporarily) produced range estimates almost double the factory-new range of the car. Same thing if it is reset it at the top of a long down hill road.

 

We took our 24kWh Leaf from New Plymouth to the Eltham cheese shop when we first got it (so had the battery SOH to do this journey) and the trip to Eltham includes a 350m altitude rise so we arrived in Eltham with well less than half our original range remaining. The trip home used a lot less battery as predominantly 'downhill' so all ended well. Phew!

 

Just another factor to bear in mind for owners of limited range EVs. Fortunately our Polestar2's use of Android Automotive OS includes access to Google maps so effects on range due to elevations along the planned route are included in range calculation.





https://www.harmlesssolutions.co.nz/




GV27
5552 posts

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  #2947064 27-Jul-2022 19:05
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tripper1000:

 

It may not all be down to your lead-foot - don't forget it is winter and if you've been using the heater your GOM range will be reduced from that as well. If/when you try a conservative driving phase, turn the A/C and Heater off. 

 

I have a 24kw, so the GoM-algorithm may/probably differs to a 40kw, but I have reset the km/kw meter while stuck in slow moving traffic on a flat motorway and the GoM has (temporarily) produced range estimates almost double the factory-new range of the car. Same thing if it is reset it at the top of a long down hill road.

 

 

The reason I ask is I'm looking at two different 40kwh ones, both the same year/spec, but one has a GOM-indicated range of 225km and the other looks to be around 270km. The lower reading one is a lot newer than the other but in overall better condition. 

 

So trying to find reasons why the GOM for the low-mileage one might be so much lower than seems to be normal for that year/mileage, judging by what's on Goo and other classified sites. Surely that can't be down to driving style alone? 


everettpsycho
574 posts

Ultimate Geek


  #2947075 27-Jul-2022 19:31
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GV27:

The reason I ask is I'm looking at two different 40kwh ones, both the same year/spec, but one has a GOM-indicated range of 225km and the other looks to be around 270km. The lower reading one is a lot newer than the other but in overall better condition. 


So trying to find reasons why the GOM for the low-mileage one might be so much lower than seems to be normal for that year/mileage, judging by what's on Goo and other classified sites. Surely that can't be down to driving style alone? 



Best thing to do is get a leafspy report with the battery health on it. I'd suspect one will have a lower health on the battery and therefore hold less charge.

The GOM is guesswork though so the range on it can vary wildly. We did Christchurch to Geraldine and when we left ashburton we had double the range we needed on the GOM, we barely made it there thanks to the uphill and highway speed driving. If the one with lower range was driven fast, uphill or just aggressively not in eco mode with Regen off the range would be significantly lower for good reason.

GV27
5552 posts

Uber Geek


  #2947080 27-Jul-2022 19:40
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everettpsycho:

Best thing to do is get a leafspy report with the battery health on it. I'd suspect one will have a lower health on the battery and therefore hold less charge.

 

I'm bidding at auction so just extrapolating the GOM out to see what the 100% charge range is.

 

No chance to get a LeafSpy report sadly, but looking at FlipTheFleet, the one with the lower range seems almost outside the statistical bounds for where a 2020 car should be. It's weird. 


HarmLessSolutions
617 posts

Ultimate Geek


  #2947081 27-Jul-2022 19:46
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GV27:

 

everettpsycho:

Best thing to do is get a leafspy report with the battery health on it. I'd suspect one will have a lower health on the battery and therefore hold less charge.

 

I'm bidding at auction so just extrapolating the GOM out to see what the 100% charge range is.

 

No chance to get a LeafSpy report sadly, but looking at FlipTheFleet, the one with the lower range seems almost outside the statistical bounds for where a 2020 car should be. It's weird. 

 

If the seller won't supply a battery SOH (that is provided by using a LeafSpy) then walk away. Do Not buy a Leaf using the dashboard displayed GOM figure as a reference of battery condition. If the car has just travelled downhill for the last 5km the GOM will read a far higher number than if it has driven uphill, or harshly, and a seller will know this and potentially use a GOM with optimistic numbers displayed dishonestly.





https://www.harmlesssolutions.co.nz/


GV27
5552 posts

Uber Geek


  #2947086 27-Jul-2022 20:05
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I'm buying at a Japanese auction so a Leaf Spy report is not something I can get, unfortunately. Just having to trust the conditioning reports and ideally looking for lower mileage.

 

Just a bit odd that there's such a sizeable difference between the two - I wouldn't have thought eco mode would account for almost 50km of difference in GOM alone. Maybe they were fanging it in one with the air con all the way up on the way to the auction. 


Batman
Mad Scientist
29119 posts

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Trusted
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  #2947094 27-Jul-2022 20:27
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GV27:

 

tripper1000:

 

It may not all be down to your lead-foot - don't forget it is winter and if you've been using the heater your GOM range will be reduced from that as well. If/when you try a conservative driving phase, turn the A/C and Heater off. 

 

I have a 24kw, so the GoM-algorithm may/probably differs to a 40kw, but I have reset the km/kw meter while stuck in slow moving traffic on a flat motorway and the GoM has (temporarily) produced range estimates almost double the factory-new range of the car. Same thing if it is reset it at the top of a long down hill road.

 

 

The reason I ask is I'm looking at two different 40kwh ones, both the same year/spec, but one has a GOM-indicated range of 225km and the other looks to be around 270km. The lower reading one is a lot newer than the other but in overall better condition. 

 

So trying to find reasons why the GOM for the low-mileage one might be so much lower than seems to be normal for that year/mileage, judging by what's on Goo and other classified sites. Surely that can't be down to driving style alone? 

 

 

i'm surprised you are asking this question

 

there is something called SOH which is the only thing that is useful

 

unfortuantely even that can be manipulated apparently be repeatedly fast charging to the max and discharging completely


HarmLessSolutions
617 posts

Ultimate Geek


  #2947096 27-Jul-2022 20:40
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GV27:

 

I'm buying at a Japanese auction so a Leaf Spy report is not something I can get, unfortunately. Just having to trust the conditioning reports and ideally looking for lower mileage.

 

Just a bit odd that there's such a sizeable difference between the two - I wouldn't have thought eco mode would account for almost 50km of difference in GOM alone. Maybe they were fanging it in one with the air con all the way up on the way to the auction. 

 

If the dash display is showing ECO mode (where D normally displays) then the GOM will read about 10% higher than if in D.





https://www.harmlesssolutions.co.nz/


everettpsycho
574 posts

Ultimate Geek


  #2947100 27-Jul-2022 20:47
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So for reference, we have a pair of leafs. Same year, model and both are sat around the 83% SOH on the battery with about 150km of range. So mostly equal on every front.

However one has done 45000km and the other 70000km.

There is so many factors in what impacts the battery degredation that you really need a leafspy report or similar to see the history of the vehicle to try and start figuring it out.

This is before you factor in the GOM can vary wildly within the same car based on driving conditions and style. It's well known your mood is the thing that has one of the biggest impacts on driving efficiency. It's called a guess o meter for a reason, the thing is a guide but can't be trusted.

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