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Has anyone built a heat exchanger that uses the tailpipe gases to heat water for a shower? I'm considering the tailpipe instead of tapping in the engine bay so htat the same heat exchanger can be moved to a power generator instead of the vehicle. Any experience/advice with this is welcome.

You saved some money on the mat but those metal screws are going to shred your tires, and I bet they're at least $200 a pop. There's a reason Maxtrax and lookalike designs have plastic spkes that wear out. They wear out so your tires don't.

Looking for idea for a cheap and effective recovery track, mostly for snow. I've seen people use fibergrate like this I've seen the CES Offroad on amazon for cheap here: https://www.amazon.com/dp/B01I5UTZQQ/ I'm thinking the cheapest way may be to glue harbor freight treat covers back to back...

Big risk that string gets tangled around wheel.

Decent H4 LED bulbs cost $280, and the beam pattern is not as good as $5 halogens. LED bulbs will supplant halogens someday, but we're still a few years away from it.

Sir, you should have your own "bud light real men of genius" commercial.

You can use an old fire extinguisher or propane bottle or dead pancake compressor as the air tank for free. Scavenge pressure regulators from dead compressors on eBay or craigslist

Software is OpenSCAD, printer is Dremel

Actually my original question is not "what is a 3D printer" but rather "what would you build for your expo with a 3D printer". Read it again please.

Thanks, that is the answer I was looking for.

My cheapo chinese coiled air hose split. I have a spool of brake hose that looks much stronger. Would it be ok to just add air fittings to a length of brake hose to rig a stronger air hose? I'd like hydraulice pressures within a brake line are much higer (10x) that that of an air compressor.

Suppose you had access to a 3D printer for the weekend. What would you build for your expo?

Usually postcoolers on compressors include a dessicant or water collection device to prevent water condensed during cooling (in radiator or heatsink) to enter the circuit. Is there a way to remove water from the intercooler/tank?

That's a hulk of a heat sink on top. Must have great thermal efficiency.

Problem is, as vehicle ages and value depreciates, some owners fail to keep up with maintenance, because they calculate that vehicle low value doesn't justify the expense. So watch out for this on the used market.

4Runner is one of the most reliable vehicle.there is no too many miles given documented regular maintenance, that's for the power train. For everything else there is rust

Any lamp from Petzl is going to be top notch. Petzl makes awesome S&R equipment BTW not just headlamps.

I hear good things about Sumosprings. They are extended polyurethane bump stops. The nice thing about poyurethane is taht it acts as both a spring and a shock absorber. While adding a steel leaf makes the spring pack stronger, it creates an imbalance and the shocks become unmatched to the...

3M film is awesome but if you crash and the doors are jammed, rescuers will have a hard time getting to folks in the cab: