Jhalko
New member
What is the question again?
For you so called engineers out there
- Thread starter mazatal
- Start date
What is the question again?
G8RB8_12SR5
New member
The counter trolling to this thread is fantastic.
Ducmonsta
New member
Saker
Senior Member
1engineer
Moderator
I agree it is a shame when people are d!cks asking for free advice from engineers.
Very well.
It was unfortunately necessary as a course of business over my long career as a real engineer to fire thin skinned engineers and executives who let their EMO interfere with their professional judgement for the success of the enterprises.
Now, back to procuring the load cells and test apparatus to measure the CG of my rig.
It was unfortunately necessary as a course of business over my long career as a real engineer to fire thin skinned engineers and executives who let their EMO interfere with their professional judgement for the success of the enterprises.
Now, back to procuring the load cells and test apparatus to measure the CG of my rig.
Engineer
New member
Serious? This really is a helpful place but you asked a question to which there is no answer. Sure with time and all the variables one could calculate a good estimate of if a part would fail but its a single parts in a single situation.......Off roading and a 4runner are anything but. The best useful answer any of us can give is general: the lighter you keep your rig and the slower you go the lower your risk of breaking things.
hotsteel41
New member
I am not an engineer I am a metal fab guy. I am on the board at Kansas rocks park and have seen a lot over the years. I have wheeled my fj cruiser hard with good results. I have alot of good things to say about the fj/4runner platform. Weight should not be a real issue if you upgraded your suspension. I agree with a previous poster speed is the issue. Load all your gear and people up and have fun on the trails. If you take this same load up black Diamond trails like carnage canyon expect damage. I ran 315s for years and never broken a cvv joint. Have fun!
Chsbrgr
New member
spell check broken? I'll fix it for you... a sham...
Jhalko
New member
Maybe since I am not an engineer I'm not getting this right, but if the OP is a "real engineer" what was the purpose of this thread? Other then to get the forum engineers all riled up and the rest of us laughing at the way these threads vear no where near the original question.
:deadhorse:
:deadhorse:
1engineer
Moderator
Precisely.
KidVermicious
New member
Bullshit.
Too much CG calc error in the jury-rigged test setup, but it appears well under 68" track/2 with full beefy BudBuilt armor everywhere, aux battery, no rear seats, Baroud RTT up top, 5 Maverick Fuel 17X9 with 285/70/17 ATII LTs, full tank of gas, recovery gear, WARN 12K. 5520# static confirmed. Room for exploring with caution but no hardcore rock crawling in this mallqueen for this old fart.
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Antman
Elite Member
Attachments
1engineer
Moderator
Dude, nobody cares. Why? Because if you carry "X" with a CG of "Y" across slope "Z," everything changes when your front wheel hits a pebble and changes "Z." Or you put a fat partner in the passenger seat...or you use some fuel...or you air down...the list is endless. Now, if we are talking about a payload going up on a rocket that needs to dock with the space station then yeah, it matters. On the trail? Judgement and experience is key. You can roll the damn thing with only the driver as payload on bad slopes, or you can haul 2K across level off road. There...you made me answer.
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BlackWorksInc
New member
Just to add to this in a slightly un-invested way (because I really don't care if you annoy real engineers, "so called" engineers, or the imaginary ones at this point; its all a good read either way...
We had a gentleman with a Tacoma on a trip recently who had a hefty passenger (I'd say around 250-300lbs maybe? I'm not sure), the passenger volunteered to leave the vehicle on the trail at certain points as the Tacoma instantly gained almost a half an inch to an of additional clearance on a fairly unloaded Tacoma with Icon suspension. Well below the calculated load rating for the Tacoma in stock configuration.
What you're asking has too many variables to calculate properly. While you can load the vehicle up with plenty of weight, even a couple people will affect your clearance well before you even factor in items such as baggage, coolers, ect. Then you can counter with stiffer springs which reduce on-road drivability but react better to higher load, but in the end you're fighting variables on a constantly changing trail that you can't compensate for entirely.
Your calculations are only good for pavement and an extremely rough idea off-road; in the end your experience, vehicle control abilities, and spatial awareness will provide a better idea of what is a "safe" load-out on the trail vs. on the road.
