Several things that I learned running simulations: Camper Boxes and Shocks

[Reworked LMTV]

Interesting. When I simulated an M 1088 suspension, it recommended just 2 Fox-like shocks at the front to stop the porpoising. Since custom shocks are very pricey, this is a good thing. Actually you can't even get the Foxes now. It also stated that the M1088's short wheelbase is a big contributor to porpoising. It did not recommend removing leaves from that stack in the rear. In fact, it strongly recommended against it with a camper box. Alternative shocks at the rear from Gabriel were just fine. It did recommend considering moving the shock brackets to a more upright position in the rear. Also, while I was aware that the power packer air shocks are pricey, there is another reason not to use them. The A0 set up actually also contributes to the annoying bouncy ride. The Problem: the MTV "porpoises" (bucks front-to-back) because the heavy cab-over design acts like a giant pendulum. Maybe the shock helps this.

With regard to the box and wind drag, it appears that the 3.07 gear arrangement REALLY benefits from drag reduction efforts at top of the cab, the dirty air between the camper and the cab, and air moving through the high ground clearance frame.

AI is not perfect, but it does make us think (hopefully lol )

 

[Keith Knight]

Interesting.

 

[ckouba]

The Problem: the MTV "porpoises" (bucks front-to-back) because the heavy cab-over design acts like a giant pendulum. Maybe the shock helps this.

I forget how many miles I have logged on my 1088, but it's getting close to 20k and just about all with my habitat on it, and I can unequivocally state that porpoising has never been an issue. I do have some sort of imbalance or other sort of tire shake just shy of ~60MPH, but that will eventually get resolved.

Apart from that, it rides easily as well as my dually Dodge.

AI is not perfect, but it does make us think (hopefully lol )

It's results like these which remind me AI doesn't know what it's doing yet.

 

[QuixoticF]

AI is very good at looking like it knows what it's talking about while also making everything up. I would advise against poisoning this quality source of information with AI generated content.

 

[GeneralDisorder]

Never experienced that with my even shorter wheelbase 1079. Which I've got 30k miles on. Purchased with 3k miles. I agree that AI knows zip in terms of these vehicles especially. There's not enough information out there for it to base anything on so it's reaching for what it "thinks" (very loose term since it doesn't think it calculates probabilities) is correct information but there was never enough of these built and talked about in it's data set to have a meaningful sample size. Thus it sounds like it's your weird uncle.

 

[Ronmar]

I have had AI quote back my own comments written on this very forum, so it is immediately suspect…

 

[GeneralDisorder]

I have had AI quote back my own comments written on this very forum, so it is immediately suspect…

No joke. I have thought that this will probably happen for some of us that get up to some stupid post counts. In another hobby, on another forum, in a different universe, I have like 25,000 posts so I fully expect that some of my dumb ideas and concepts from 25 years ago will end up surfacing in the AI world as I still get people messaging me about things I've almost forgotten I ever knew.

 

[QuixoticF]

Even when there is a plethora of information on a topic AI makes mistakes, it's the nature of how AI works. It's not thinking, it's guessing based on statistics what sounds the best.

 

[Reworked LMTV]

I forget how many miles I have logged on my 1088, but it's getting close to 20k and just about all with my habitat on it, and I can unequivocally state that porpoising has never been an issue. I do have some sort of imbalance or other sort of tire shake just shy of ~60MPH, but that will eventually get resolved.

Apart from that, it rides easily as well as my dually Dodge.



It's results like these which remind me AI doesn't know what it's doing yet.

AI is very good at looking like it knows what it's talking about while also making everything up. I would advise against poisoning this quality source of information with AI generated content.

Even when there is a plethora of information on a topic AI makes mistakes, it's the nature of how AI works. It's not thinking, it's guessing based on statistics what sounds the best.

I forget how many miles I have logged on my 1088, but it's getting close to 20k and just about all with my habitat on it, and I can unequivocally state that porpoising has never been an issue. I do have some sort of imbalance or other sort of tire shake just shy of ~60MPH, but that will eventually get resolved.

Apart from that, it rides easily as well as my dually Dodge.



It's results like these which remind me AI doesn't know what it's doing yet.

Even when there is a plethora of information on a topic AI makes mistakes, it's the nature of how AI works. It's not thinking, it's guessing based on statistics what sounds the best.

Do not mistake my posts as promoting AI. I am just sharing results and clearly mentioning it is AI and its shortcomings. I think it is interesting food for thought, especially when it fails. Hardly poisoning. Would I start with the 2 shock approach before buying 6? Absolutely! Nothing to lose. Empirical data is VERY important as well. Would I ask AI where to mount a sensor on a modern engine. Heck no! It has no knuckles to cut and bruise taking the fricking thing out!! Would I listen to a blow hard who has actually 'done it". Uh yeah...duh!

 

[Reworked LMTV]

I forget how many miles I have logged on my 1088, but it's getting close to 20k and just about all with my habitat on it, and I can unequivocally state that porpoising has never been an issue. I do have some sort of imbalance or other sort of tire shake just shy of ~60MPH, but that will eventually get resolved.

Apart from that, it rides easily as well as my dually Dodge.



It's results like these which remind me AI doesn't know what it's doing yet.

So yes loading is definitely a key. Interesting, the harmonic that you describe is where AI stated where the problem would be at its worst.

 

[Reworked LMTV]

Never experienced that with my even shorter wheelbase 1079. Which I've got 30k miles on. Purchased with 3k miles. I agree that AI knows zip in terms of these vehicles especially. There's not enough information out there for it to base anything on so it's reaching for what it "thinks" (very loose term since it doesn't think it calculates probabilities) is correct information but there was never enough of these built and talked about in it's data set to have a meaningful sample size. Thus it sounds like it's your weird uncle.

Good point. Your truck is built on the 2.5-ton chassis. The leaf springs are softer because they are rated for a lighter payload. That van body is heavy, and it is there always. You are effectively driving a loaded truck 100% of the time. The weight of the box pre-loads the suspension, keeping the springs compressed and active.

 

[Reworked LMTV]

Even when there is a plethora of information on a topic AI makes mistakes, it's the nature of how AI works. It's not thinking, it's guessing based on statistics what sounds the best.

I am not going to disagree with what you are saying : )

 

[GeneralDisorder]

Good point. Your truck is built on the 2.5-ton chassis. The leaf springs are softer because they are rated for a lighter payload. That van body is heavy, and it is there always. You are effectively driving a loaded truck 100% of the time. The weight of the box pre-loads the suspension, keeping the springs compressed and active.

While it's true that I'm heavier than a cargo model, the empty curb weight is 21,500 lbs or so and the truck still carries roughly a 5,000 lb payload capacity on top of that with the he official GVW listed at 25,980 lbs. And that's generally considered an "off road" spec with the axles and tires, etc easily handling double that amount on-road where it won't experience the side angles and approach/departure.

Additionally my 2008 A1R has a heavier leaf pack (four leaf) vs the older models that only had a three leaf pack.

I'm quite sure that none of the AI models have this information since it's not widely available and few real A1R 1079's exist in the wild. I know of three on this forum and Facebook. There may be a couple more but I wouldn't begin to guess where. Rare doesn't accurately describe it.

 

[Reworked LMTV]

While it's true that I'm heavier than a cargo model, the empty curb weight is 21,500 lbs or so and the truck still carries roughly a 5,000 lb payload capacity on top of that with the he official GVW listed at 25,980 lbs. And that's generally considered an "off road" spec with the axles and tires, etc easily handling double that amount on-road where it won't experience the side angles and approach/departure.

Additionally my 2008 A1R has a heavier leaf pack (four leaf) vs the older models that only had a three leaf pack.

I'm quite sure that none of the AI models have this information since it's not widely available and few real A1R 1079's exist in the wild. I know of three on this forum and Facebook. There may be a couple more but I wouldn't begin to guess where. Rare doesn't accurately describe it.

Interesting. Wonder if earlier models could be upgraded in some way.

 

[Gcelevator]

A friend asked Chat GPT or AI or any of those last year about some wire number on a humvee to do some connection or upgrade, next thing you know he called me, he needed help because the damn AI told him to cut the wrong wires. I learned the old fashioned way and i was raised that way, i don't trust AI or the similar. If i can't read it or understand it you can me 100% sure i am not asking a computer that collect random information. I am more confortable with real people with real hands on experience.
Another day i was talking to another friend about humvees as well, he started talking to Oscar on the phone and they had a debate back and forth and exchange of information so i had to ask him "who is that?" And he goes " oh, that is my AI friend"
I must have a lose wire to be talking to a phone like a real person but to each their own.

 

[Keith Knight]

Absolutely real people information “RPI” is the future.

 

[Reworked LMTV]

A friend asked Chat GPT or AI or any of those last year about some wire number on a humvee to do some connection or upgrade, next thing you know he called me, he needed help because the damn AI told him to cut the wrong wires. I learned the old fashioned way and i was raised that way, i don't trust AI or the similar. If i can't read it or understand it you can me 100% sure i am not asking a computer that collect random information. I am more confortable with real people with real hands on experience.
Another day i was talking to another friend about humvees as well, he started talking to Oscar on the phone and they had a debate back and forth and exchange of information so i had to ask him "who is that?" And he goes " oh, that is my AI friend"
I must have a lose wire to be talking to a phone like a real person but to each their own.

It has already been discussed that there are issues.