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Unless you also include a shock absorber of some type it will be like riding on a pogo stick. Springs alone... very bad idea.

Just for comparison... my kinematic subframe is not hard mounted at any point, but in order for that to work safely the spring mounts have to provide fore, aft and lateral support. I have seen lots of subframe designs over the years and there have been many differences between them. Ten years...

Shouldn't the company that is building your camper setup have the answers to all of these questions you are asking?

The truck's electrical system can suffer a serious voltage spike if the battery earth is disconnected while the truck is running, because the alternator will still be generating power. This could destroy your ECU. If you wanted a "kill switch" for the engine, it would also need to include a...

A big dog on a long leash... ;)

Exactly.

There are a lot of variables when it comes to dynamic loads, so I totally agree about a trial and error approach when dealing with kinematic subframe mounts. It's what I did. Just a word of advice... if you can, choose a spring size that comes in a variety of spring rates. That will allow you to...

How are you mounting that tank? I ask because that area of the chassis is likely to experience a reasonable amount of flex, which is not ideal for a metal tank.

Is it... or is it just a whole lot of AI generated camper concept vehicles?

If you were in Australia I recon that you would have sold these very shortly after you listed them. Obviously the US market is a different animal. :(

I totally agree, that's why all of my centrally mounted tanks (fuel and water) have their own 3 point kinematic mounts. My other tanks are mounted directly to my subframe, which also has a kinematic spring mounting system. :)

Absolutely, but there is still the slight possibility of it happening. As I said... it is relatively simple to include a basic safety system. I did this with electronics and a couple of capacitive switches, but a tube between both tanks would also work.

Realistically, it does not matter if the fuel is diesel or petrol/gas; the concepts are the same. I actually like Mick's setup, as it simply makes 2 tanks into 1, negating the need to do anything manually. :) Be mindful that if you do intend to use a transfer pump, it is technically possible to...

As has been noted above, you have numerous options when it comes to a second fuel tank. On my truck I have 2 tanks, but only one is monitored by the truck's fuel gauge. There is a custom made stainless steel centrally mounted 200L tank between the chassis rails and another 110L custom stainless...

One thing to consider would be how much the turning circle is affected by increasing the wheelbase.

These trucks don't have the greatest airflow to the radiator (and intercooler, if your truck has one) at the best of times, so adding something that would potentially reduce that airflow further may prove problematic. I don't know how your truck is configured (upgraded front bar, recovery winch...

That is definitely a surprise to me, as none of their vehicles retained the OEM wheels when they went out the door. They must have done something with them...

There comes a time when all things mechanical have issues. Not a lot you can do about that, other than keeping the maintenance up and crossing your fingers... ;)

That is exactly how I have done my main fuel tank and primary water tanks. :)

That's one way to address your problem... :giggle: