You guys have me missing my Ram 3500 with the venerable 5.9l Cummins.

 

I agree with the cummins statement but they typically run lower oil pressure anyways as opposed to cat or Detroit. We have some m11's that run around 15-20 and they're recon's. As opposed to the survival rate on a mixed fuel on diesels I don't agree with. Gas will detonate looooonnnng before tdc on a diesel just because of the 17:1 - 20:1 compression ratio. I realize that this example is not the same caliber of engine but we had a 6.5l Chevy diesel that had gas put in and it annihilated that engine. The bigger class diesels will survive but it ain't just an injector cup drying out lol.

 

kind of makes me want a diesel, lol

 

Why the need for the high fuel pressure? Is it because it is supplying it at the peak of the compression cycle?

 

The high fuel pressure atomizes the fuel better, striving to achieve a homogeneous mixture, which produces the most efficient combustion.

 

If you looking for info on diesel motors look at Audi/VW.
Audi/VW has the most advanced diesel motors in the world.
Audi races in the prototype class and win's a lot of races with diesel power cars.
A buddy of mine has a VW TDI Golf, It gets stupid MPG and is very zippy.
It is super quiet to the point you would never guess it's a diesel.

 

Eh, my cummins ran mid 13's @105-6 w/ a 2.5 60' with about $1000 into it. 536whp thru a slipping auto. It made a name for itself around town, but I tore it apart a year or so ago and it just sits right now. Here a short clip running a cbr that needed a jetting a few years ago.

 

The 6.2 and the 6.5 before the Duramaxx came out were both 22.5:1 compression. Learned that in GM ASEP school. Made my eyes go when I read it.

They were such slugs they needed all the compression they could get, plus the turbo was about as big as a Grand National turbo on a freaking 6.5L motor!

 

I work at caterpillar Engine center in lafayette, in. Come down and ill show you a real diesel engine. I work on the C175 line, and we make 16 and 20 cyl diesel engines. Head-per cylinder design. The crank weighs 2600lbs if that gives you an idea of how big these things are. they'll make about 2000hp, and north of 15000ftlb of torque and more. And these aren't even our biggest engines. these are off highway truck engines. Oh, and our standard is 4 turbos, and our high altitude setup on the 20cyl 797F cat truck is 6 turbos.

 

Yep... I had one of those for a long time.
After I blew tow motors I put a 18:1 motor in the truck with a Holset and put 30 PSI to it.
Made power and moved for the first time in its life!

Got a D-max now at 45 PSI of boost, much happier

 

That is correct, first stage/large turbo is always the one to see intake air first, and is the primary

 

Some good information here...

 

Well I've been running the turbo from a 3406B Cat (15L) on my 5.3L....

What's up fellow Cat brother. Engineer in East Peoria here...

C175 is a bad motha.

 

Then there is those whackos that put them in silly things likes Camaros, Mustangs, dragsters and so on. Goofey people.

I was just working on this pile of pipe with billet block Duramax a couple weekends ago.

By the way Louis Happy Thanks Giving. Hope to run see you at The Mile.