Recommended speed?

[Douw Kruger]

On our recent trip to Kruger Park the effect of speed, whilst towing ànd not towing, was again demonstrated.

The Puma has 212k on the clock.  When not towing I get about 8 kpl driving 105 to 110 kph. Towing the seriously modified Bundu Basher on this trip I got 7.2 kpl to 9 kpl, depending on the speed and the terrain. In the Krugerpark the consumption improved to 11.5 kpl (not towing) and 10 kpl (towing).

On the return trip the consumption was better than on the inbound leg. But I was driving slower.

I am upgrading to Xcape. So the effect on my Landy is something to consider. This Landy must keep up the good work until I go to Huis Aandskemering. I think I must drop the speed to 90 kph, which is roughly what I had done on the return leg from Kruger.

The question is, what is the long term effect on a towing vehicle if towing a 1000kg caravan regularly at moderate speed?

Douw

On Mon, 05 Jul 2021, 5:39 am <overlan...@googlegroups.com> wrote:

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Joao Felizardo <jmjfel...@gmail.com>: Jul 04 11:05AM +0200 For those interested , here is a very important piece of information captured via an interview with Dr Robert Malone , the developer of the mRNA technology himself. Rgds . https://www.thelastamericanvagabond.com/dr-robert-malone-interview-inventor-of-mrna-technology-censored-for-speaking-out-on-vaccine-risks/     On Sat, 3 Jul 2021 at 16:55, swissnomads2013 via overland-forum <

"Mike" <mi...@4x4store.co.za>: Jul 04 01:02PM +0200 “All this witch doctors’ stuff is not really helping against this Virus.”” You are 100% right. “   Agree!   Mike       From: overlan...@googlegroups.com [mailto:overlan...@googlegroups.com] On Behalf Of Joao Felizardo Sent: Sunday, 04 July 2021 11:06 AM To: overlan...@googlegroups.com Subject: Re: [Overland] Digest for overlan...@googlegroups.com - 9 updates in 3 topics     For those interested , here is a very important piece of information captured via an interview with Dr Robert Malone , the developer of the mRNA technology himself.   Rgds .   https://www.thelastamericanvagabond.com/dr-robert-malone-interview-inventor-of-mrna-technology-censored-for-speaking-out-on-vaccine-risks/       On Sat, 3 Jul 2021 at 16:55, swissnomads2013 via overland-forum <overlan...@googlegroups.com> wrote:   You are 100% right.     My neighbours, 2 adults 3 kids, got infected by covid-19, luckily with mild symptoms. But the parents told me it was 100 times worse than a heavy flu.     We are happy to get the two japs. It’s not only to protect us, but also for people who are not able to get the vaccine for health reasons.   All this witch doctors’ stuff is not really helping against this Virus.     Greetings   Emanuel Berger     Kirchmattstrasse 2   3422 Kirchberg   Switzerland     Mobile: +41 79 352 24 31   Home: +41 34 445 21 51     Afrika-Blog: <https://africanomads.wordpress.com/> https://africanomads.wordpress.com     Von: overlan...@googlegroups.com <overlan...@googlegroups.com> Im Auftrag von Graham Everett Gesendet: Samstag, 3. Juli 2021 00:42 An: overlan...@googlegroups.com Betreff: Re: [Overland] Digest for overlan...@googlegroups.com - 9 updates in 3 topics     You've got to be kidding Joao, you're seriously thinking about NOT having the vaccine??? Especially after you know people who've died of covid? What planet have you been living on this last 18 months? The sooner we all have been vaccinated the sooner the world will be back to some sort of normality. Most of the third world are complaining that here in the UK we are thinking of giving a 3rd booster jab, before helping out poorer countries & you don't want it anyway? WHY? I'm so glad to have had both jabs, & everybody I know feels the same . My own kids can't wait to have their 2nd jab.   Graham   www.rovingbonkers.com       On Fri, 2 Jul 2021 at 04:39, <overlan...@googlegroups.com> wrote:     <https://groups.google.com/forum/?utm_source=digest&utm_medium=email#!forum/overland-forum/topics> overlan...@googlegroups.com   <https://groups.google.com/forum/?utm_source=digest&utm_medium=email/#!overview> Google Groups   <https://groups.google.com/forum/?utm_source=digest&utm_medium=email/#!overview>   Topic digest <https://groups.google.com/forum/?utm_source=digest&utm_medium=email#!forum/overland-forum/topics> View all topics   · Thabazimbi - recommended butchery? - 2 Updates   · Natural immunity vs Covid-19 vaccine-induced immunity – Marc Girardot of PANDA - 3 Updates   · Sad Landy news in Namibia - 4 Updates   <http://groups.google.com/group/overland-forum/t/7cc35acde54a721b?utm_source=digest&utm_medium=email> Thabazimbi - recommended butchery?     Jean Struweg <jean.s...@gmail.com>: Jul 01 12:56PM +0200   Hi Gents Is there a butchery in Thabazimbi that anyone here endorses? Thanks & cheers Jean     1bostoe <1bo...@gmail.com>: Jul 01 01:57PM +0200   Hi Jean, We were at Marakele last week, we used the Pick&pay in the shopping centre, the meat was good and not badly priced. There is a butcher at the northern end of the town which looked fine. Bulhoe Butchery 2 Jacaranda St, Thabazimbi, 0380 Tks Neels   Back to top   <http://groups.google.com/group/overland-forum/t/45c8ddc9f8fc0945?utm_source=digest&utm_medium=email> Natural immunity vs Covid-19 vaccine-induced immunity – Marc Girardot of PANDA     Joao Felizardo <jmjfel...@gmail.com>: Jul 01 09:55AM +0200   FYI https://www.biznews.com/health/2021/06/28/covid-19-vaccine-immunity     Fanie du Plessis <dupless...@gmail.com>: Jul 01 12:11PM +0200   *Sadly Johan Strauss owner of Steinfeld Garage near Keetmanshoop passed away last night from Corona.His wonderful wife Inya is in a coma battling it as well... fight it Inya, fight it!!* The above from another Overland Forum post tells me to get the jab if you can, you just don't know if you will survive it in order to have natural immunity, I guess each make their decisions and live with it. Op Do. 1 Jul. 2021 09:55 het Joao Felizardo <jmjfel...@gmail.com> geskryf:     Joao Felizardo <jmjfel...@gmail.com>: Jul 01 12:17PM +0200   Correct ! I have lost 2 personal friends to covid 19 ; but that does not mean that I will rush to a decision now ; personal as you said ! On Thu, 01 Jul 2021, 12:12 Fanie du Plessis, <dupless...@gmail.com> wrote:   Back to top   <http://groups.google.com/group/overland-forum/t/c3a4b5cbc16670ce?utm_source=digest&utm_medium=email> Sad Landy news in Namibia     roaming yak <roami...@gmail.com>: Jul 01 08:26AM +0100   Sadly Johan Strauss owner of Steinfeld Garage near Keetmanshoop passed away last night from Corona. His wonderful wife Inya is in a coma battling it as well... fight it Inya, fight it!! I spent 2 weeks there at the end of last year, at first fixing my transfer box and then the second week just filming and photographing the beauty of the place and the wonderful vehicles and parts lying around.     "Uli von Kapff" <ulivo...@gmail.com>: Jul 01 10:01AM +0200   Sad, sad news. As Defender owners, we had the highest respect for Johan’s vast knowledge and abilities around anything to do with LR. He sorted out the extensive trouble we once had and enjoyed the superb hospitality of Inya. Johan also gave me many tips on how to drive a Defender properly.   We pray for Inya to pull through.   Uli and Jenya   From: overlan...@googlegroups.com [mailto:overlan...@googlegroups.com] On Behalf Of roaming yak Sent: Thursday, 01 July 2021 9:26 AM To: overlan...@googlegroups.com Subject: [Overland] Sad Landy news in Namibia   Sadly Johan Strauss owner of Steinfeld Garage near Keetmanshoop passed away last night from Corona. His wonderful wife Inya is in a coma battling it as well... fight it Inya, fight it!!   I spent 2 weeks there at the end of last year, at first fixing my transfer box and then the second week just filming and photographing the beauty of the place and the wonderful vehicles and parts lying around. -- -- DO YOU WANT TO UNSUBSCRIBE ? Then send a blank email to: overland-foru...@googlegroups.com <mailto:overland-forum%2Bunsu...@googlegroups.com> <mailto:overland-foru...@googlegroups.com <mailto:overland-forum%2Bunsu...@googlegroups.com> >   4x4's and other stuff for sale: http://www.overland.co.za/phpBB3/viewforum.php?f=2 --- You received this message because you are subscribed to the Google Groups "overland-forum" group. To unsubscribe from this group and stop receiving emails from it, send an email to overland-foru...@googlegroups.com <mailto:overland-forum%2Bunsu...@googlegroups.com> <mailto:overland-foru...@googlegroups.com <mailto:overland-forum%2Bunsu...@googlegroups.com> > . To view this discussion on the web visit https://groups.google.com/d/msgid/overland-forum/CAJHD4nEPg%2BtePV%3D3cK7DVzHRaBPv8KCLaGwUL1%3DJ6t%2Bg11EFxA%40mail.gmail.com <https://groups.google.com/d/msgid/overland-forum/CAJHD4nEPg%2BtePV%3D3cK7DVzHRaBPv8KCLaGwUL1%3DJ6t%2Bg11EFxA%40mail.gmail.com?utm_medium=email <https://groups.google.com/d/msgid/overland-forum/CAJHD4nEPg%2BtePV%3D3cK7DVzHRaBPv8KCLaGwUL1%3DJ6t%2Bg11EFxA%40mail.gmail.com?utm_medium=email&utm_source=footer> &utm_source=footer> . -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus     "Willem Coetsee (GMAIL)" <willem....@gmail.com>: Jul 01 01:03PM +0400   Truly sad. A friend of mine works with them and lives on the farm, and we have been talking about it. He is ill too but had to do the necessary the past few days. One thing that he told me is how well the Keetmanshoop community came together to support those in need of help.     Stuart Carliell <stuart....@gmail.com>: Jul 01 11:11AM +0200   What terrible news, they were such a lovely couple! Our stop on the farm during our trip down from Kenya remains one of the most memorable services we have ever done on the landy. And Inya hospitality... On Thu, 01 Jul 2021 at 11:03, Willem Coetsee (GMAIL) <   Back to top     You received this digest because you're subscribed to updates for this group. You can change your settings on the <https://groups.google.com/forum/?utm_source=digest&utm_medium=email#!forum/overland-forum/join> group membership page. To unsubscribe from this group and stop receiving emails from it send an email to overland-foru...@googlegroups.com.   -- -- DO YOU WANT TO UNSUBSCRIBE ? 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[Bertus Bekker]

On a Def, effect is probably close to  nothing.

Airbags in rear springs might prevent sagging. Higher pressure in rear wheels also good.

Your 1:1 gear (probably 5th on Puma) should be best for gearbox.

[Francois Visagie]

Hi Douw,

 

In my experience the harder you make an engine work (especially a diesel) the less working life you get out of it.

 

E.g. a 300Tdi occasionally driven at 120 kph for long stretches even with sympathetic driving and otherwise looked after really well needed urgent overhauling/replacement at around 250k. Wear on the rings, cylinder walls etc. had made compression go down badly.

 

Some people reckon that the design life of diesels of that era is typically 250k – 300k anyway, but I believe that demanding less of the engine should significantly prolong its life. The top speed I drive at now is 100 kph ;-).

 

I wouldn’t know what a sympathetic speed for the Puma would be, but I find that there comes a point with a significant jump in engine and exhaust temperature and that is where you should maybe slack off a bit.

 

François Visagie

 

 

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[Hennie Rautenbach]

It's not the speed that is the issue i.t.o engine longevity. It's the RPM. I never take a TD engine over 3000 RPM. 

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[grahambowring2]

I know nothing about LR longevity and am not an engineer but was indoctrinated during a lifetime with Caterpillar that diesel engine life is proportional to litres of fuel consumed.  

This went as far as overhaul recommendations for larger equipment was delineated in litres of fuel without any reference to engine hours. So an engine more lightly loaded might live 25,000 hrs to overhaul vs 15 - 20,000 hours for an engine more heavily loaded.

And if my memory serves me correctly wind resistance increases according to the square of speed increase. Not relevant on a mining truck but sure is on a 4WD with the aerodynamics of a brick @ 90kph or more!

Bottom line both engine speed & vehicle speed are likely to determine engine life as both will impact fuel consumption.

Graham Bowring

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[Hennie Rautenbach]

Fair point. So in simplified terms, two Landies (300Tdi as example) that have the same kilos, same maintenance and same adherence to careful driving may require engine rebuilds at different times if the one was towing a Jurgens Explorer all its life... Make sense. 

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[Eben Henning]

One step further .....

EGT is directly related to fuel burned, in relation to your specific vehicle configuration.

EGT is also an indication of the thermal stresses on the engine.

So if you want to keep an eye on your vehicle longevity, simply keep to the same rule as off road speed, as low as possible, as high as necessary.

EbenH.

On Thu, Jul 8, 2021 at 10:51 AM grahambowring2 <grahamb...@gmail.com> wrote:

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[Eben Henning]

Applicable to EGT that is :-)

[Fanie du Plessis]

And if I remember well, engine wear is also related to the square of engine speed 

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