Quote Originally Posted by blackshine007
Well according to the guy rattling off specs about someone else's diesel truck (he's a member in here) He said that it was a twin turbo set up on 10:1 compression. I asked the same exact question. It crunk up with no problem being that it was warm already. I would assume it wouldn't do shit at that low. So let's just call the guy "Genious" for a moment. The guy in the diesel truck was doing some crazy ass drifting in the parking lot. I thought the thing was gonna flip from hitting the curb and/or take out the light poll a couple of times. I asked "Genious" what was done to it. He was like "The guy said it has a twin turbo set up on 10:1 compression....."
me: WOW!!! That's low!!!
Genious: What do you mean low?
me: Umm, why would you wanna lower the compression that low on a diesel?
Genious: (giving me a look like I'm a dumbass) To get more air into it!!! (giving me the duh look and walks away)

So I guess I'm missing something on why would an outrageously powerful diesel have lower compression in it. I would assume by the characteristics of the engine, it should've never been touched

If I understand you right, I think it's because the newer technology, such as common rail and AECS factored with the ability to increase the incoming air temperature to about 700-900 degrees without the use of a higher compression ratio, diesels are able to drop their C.R. Dropping the C.R. for them would help in effiency, and would also allow them to burn a lighter fluid, such as methenol or propane.

Basically, from my weak understanding, they drop the C.R. so that they can modify other aspects of the system due to the technology replacing glow plugs and getting rid of the need for a higher C.R. to cure the cold-start woes some diesels have had. But like I said, mostly due to the newer technology allowing them to drop C.R. via heating the air temperature another way and using a higher pressure fuel system.

But I don't know diesels for shit, so take what I said with a grain of salt, but hopefully I'm not too far off. Kinda rare to find diesel mechanics these days, but I hope someone corrects me where I'm wrong.