Black Smoke.....power or waste?

But the supercharger on a two stroke Detroit was used to scavenge the exhaust out of the engine not to boost the air pressure going into the engine.

detroit did make a turbo'd version of both the inline and V-8 engines...

 

Me too.... mines been junk for the last 1,730,000 miles....

:smt065

 

[ame]http://www.youtube.com/watch?v=dGXDJqrlOaM&feature=related[/ame]

http://www.youtube.com/watch?NR=1&v=kJp_-6v5r-0

[ame]http://www.youtube.com/watch?v=TxguiEZ7hp4&feature=related[/ame]

Is this the smoke and power we're talking about?

 

[ame]http://www.youtube.com/watch?v=sZ8g__S0yhA&feature=related[/ame]

Or this?

 

In that first video something look like it let loose in Coutrue motor. Watch at the 4 sec mark under the truck, big puff of smoke.

 

1,700,000 miles on MBN? You gotta be sh--ing me Krooser

 

See the smoke in the video's? When making extreme power, black smoke is a necessary by-product. Larger injectors, and fuel plate (I meant fuel plate btw, not throttle body) modification, no EGR, etc. will make more smoke and power. The more air and fuel you can stuff into the engine (which is basically an air pump) the more power and most likely more smoke there will be.

You can get impressive power numbers and streetability with minimal extra smoke, but there will always be a bit more smoke when souping up a diesel.

Im thinking of building a 11 or 12 second quarter mile diesel powered street truck. hehe

Now I just have to learn more about diesels.

 

Though I may not be 110% spot on (nobody knows everything and I don't feel like pulling out my Detroit shop manuals), I am far closer than you give me credit for. Naturally aspirated simply means aspiration is natural, IE, no forced induction (turbo or supercharger). Carb, injection, ect has nothing to do with it. The air pressurized by the blower is bled off through the exhaust valves and out the exhaust, blowing the exhaust out and resulting in a cylinder full of fresh air at a pressure close to exhaust back pressure. Beyond that, I don't see where you disagree with me in the slightest, it's basically just adding to what I said. In the end, the important point is that the blower on the old Detroit's isn't like a turbo on a four stroke, it's more like an iron lung that replaces the intake and exhaust strokes.

As far as the success of turbocharging them, I have found, both through experience and research that the old two strokes found a lot of success with turbocharging. I've been dabbling in the two stroke world for a number of years now (the old two strokes are kind of a special interest of mine. Though far outdated and beyond their time, they are my favorite engines ever produced) and have yet to see or hear of any real reliability problems with turbocharged ones. In fact, the biggest problem I've even heard of was a 4-53T with some huge injectors (well over 115's) that puked a crank. The 8.2 medium duty V8 four stroke however, had serious issues out the door as an NA and it got even worse when they slapped a turbo onto them. Please bear in mind, I'm not disagreeing with you, just stating that what I've seen and experienced may be different from what you've seen and experienced. Doesn't make either one of us right or wrong, just means we have different view points.

 

Rcpullerdude, how bout you talk to some professional tractor pullers or some pump shops that build injection pumps for these engines. There is a reason that the high dollar pumps have a "smoke" screw on them.

When I said performance engine I mean the one me that are taking 5.9L cummins engine and building 2500hp, or the ones taking a DT466 international and making over 3000hp, but those guys wouldn't know what they are doing would they.

 

Ha, like Erik Stacy with triple chargers and 150# of boost and still blowing smoke.