Detroit 6-71

What comparator?

Oh, come on, duuuuuuuuuuude.

Let's see, a Stamford 19kW head takes 20.8kW input, roughly 28 horsies.

B&S makes a 20kW unit which uses a 993cid engine. I guess we could borrow Snag's Harley engine and...

Lloyd, you evidently missed my input there. I'm the one asking how many horsies it would take to power that head to 20kW, for a normal handy homeowner's use, so Ig could plug it as a bonus.

"Power it with any xHp motor!"

Which figures out to 200kW at a .8 power factor.

Oh, that probably makes in a 6-71NT, which is actually quieter than the original 6-71 with the straight-lobed rotors. Most of the turbocharged engines also have the helical-lobe rotors, which makes them (marginally) quieter.

They had one of the original gen sets at work for emergencies when the underground cables popped (they used to do that a LOT). They'd park it in the parking lot and run a festoon of 230 V cable to the basement of the building and wire it into the panel. You'd drive past it and think your car was going to EXPLODE from the vibration! That was a 6-71 (no N, no T) with essentially a spark arrestor on the exhaust, not really any sort of muffler. Everything on your car would be vibrating in tune with the Diesel's sonic output.

Jon

When you pull the pipes off, gently give the turbo a spin with your finger. if it turns freely, great! If it is stiff, that is not a good sign, DON'T start the engine until the turbo is serviced.

Jon

How about powering up a big 3 phase motor on an overhead!

That baby will save the house with a power outage....

Mart> I bought this generator in auction for $300 plus BP:

You can run it to produce 20 kW, but you would likely need an adaptor plate made, as the 20 kW engine would not have as big adaptor plate as the 200 kW engine.

Nice to know.

A muffler does help, with exhaust sound, but not with the rattle and such.

OK, got it thanks> Jon

Like Hell ! Did you mean "993 *CC*" engine above ? I think my B&S 5Kw genset is running an 8 hp OHV motor .

Some company might want it as a backup unit. Or Some off grid farm / ranch wants to fire up and do some work in the barn. With 1000 watt bulbs that are worth 30 years of life (Higher voltage than used). They tend to burn up the supply fast.

Think the water station pumps in a pumping station needing backup in case their 3-phase goes out - remember Katrina in La. Flooding...

Use it to electro melt a kettle of steel....

Mart> >> Personally...Id try to sell the entire unit for at least 6 months.

Yes, I also think about remote pumping stations on a big farm or some such, as a possible application. The owner would not care so much about fuel savings, or cleanliness, or noise... Cheap and reliable is good enough.

The problem with the turbo on the Detroits is simple. They have a line or internal passage that feeds them pressurized oil. They are located in the air intake system. The bearings get loose and start moving, that damages the oil seals. Pressure fed oil starts leaking into the air intake. Instant run away engine.

Easy way to check. Pull the turbo and look into the outlet side of the compressor. If you see ANY oil the seals are failing.

I haven't looked in a while but there used to be kits with upgraded parts for a reasonable price.

I do not see the price on it, how did you find out how much it sold for?

It is a bit more than just the bearings. There is the rotor to rotor and rotor to housing clearance to be checked and there are oil seals that if worn or damaged allow the engine oil to be literally pumped into the engine. The engine manual covers this, or even better if you can find a shop that used to service Detroit's.

However, general speaking, blower problems are fairly rare.

Oh, the auction has prices, sorry, they usually do not provide that inf

Y'think?

Know anyone near you with a wee piece of 1" steel plate? There's another sale for you, maybe even for fabrication, eh?

I thought you might catch that one.

Si, CC. Mea culpa.