[cleatus12r]

Originally Posted by theSLEEPER

Just wondering.

Without CP testing equiptment, how would you know when it was too much fuel? By ear. Seriously. The way the truck sounds and feels is a very good indication of what is going on. Is it perfect? Hardly. The problem with actual combustion pressure (CP) equipment is that it is a pain to install....especially on a 7.3L. Besides, without knowing what to look for (not to mention what else to hook up), most folks out there would have a worthless piece of expensive equipment sitting on the shelf. The amount of fuel isn't nearly as detrimental as WHEN the fuel gets there.

Let's say, Stg. 2's, with known good injectors and nozzles, and something like a 38R. It seems to me that "Stage 2" injectors are usually a recipe for broken engines. Why? My guess is that a lot of folks view them as glorified stockers when they are hardly that at all. "St. 2" injectors are capable of moving a lot of fuel due to the nozzle size but lack the injection volume (CC) to do much good for a long injection event. They empty quickly.

Wouldn't the sound be enough to tell you something is wrong? I know that I can hear the difference in SOI or "timing" when switching tunes. Sometimes. Without placing myself in a hairy situation, I have seen differences in various peoples' tuning. Is there a difference, you bet...and usually it's quite different between different tuners. Going by sound alone can be revealing.

Would severely advanced "timing" create a better running motor? Or would it just cause excessive heat? Believe it or not, diesels are similar to gassers in this respect. A lot of SOI advance is a good thing....to a point. Once the piston starts it's huge push before the crankshaft throw has passed TDC, it becomes bad. Same as a gasser. However, the hotter combustion temperatures aren't Mother Nature's best friend (according to the EPA nazi brigade).

What about excessive ICP along with excessive "timing"?

Does increased ICP create advanced timing? All else equal.I'll attempt these two at once. It gets hairy here since increased ICP DOES create a pseudo-advancing effect by injecting more fuel in a shorter amount of time. More fuel, shorter amount of time, and all occuring earlier in the pre-power stroke cycle.

What about IDM mods? Same thing...injector opens sooner by a few microseconds.

I'm sorry, the title may not be fitting for my questions, but I'm trying to gather all I can as soon as I can.

Could you create a more quiet and less smokey running motor by delaying SOI and calling for less fuel? Would that cause excessive lag?

I guess this is all more "theory" and not pertaining to Minotaur, so if it needs to be moved...

Thank ya'll in advance!!!
Jeret

I tried here....it's abbreviated since I should be working right now.