battyone wrote:
As far as the 50:50 mix goes,what part is the water supposed to play?
That's what I dislike about Marketing BS, it muddies the truth by exaggerating or generalising the facts.
I can only surmise water is for cooling the intake and damping the combustion process and possibly lowering EGT's too? When I begin my experimentation, I'll be better able to provide reliable data. One of the boasts from WI kit makers is that from all this cooling, the turbo is made more efficient by spraying a small amount pre-turbo.
battyone wrote:
...seems to me you'd be better just adding methanol.Although propane does appear to the fuel adder of choice.
That is the conclusion I'd drawn. Everywhere I went to ask, I was hit from all sides that it's "common sense" not to go below 50% water
. Although I can see why people believe it - thinking equal amounts will not cause an imbalance but that's way too simplistic for my common sense to accept.
battyone wrote:
As far as fuel pressures go they talk of 24,000psi
Unfortunately, I've only got an IDI engine to work on where pressures are not so mental (but still enough to pierce skin!).
battyone wrote:
All good stuff,I'm finding this diesel tech very interesting.Might have to find a small diesel to play with. Although I've got to find a cheap transit to carry the bikes before the season starts.I'll have to buy a smoker
I've got a spare pair of pulsoids
I was wholly ignorant about diesels, until I bought my first, two years ago, and the more I learn the more I want to know. Petrol engines have probably evolved about as far as they can while diesel technology is about ten years behind and the way things are now (quieter, cleaner, faster, etc) I think they've got far more potential.
battyone wrote:
Are peugot still the best for diesel?
Historically, yes. PSA (Pug and Citroen) made the best IDI engines so I suspect that's translated nicely to the DI's though it seems the common rail, high pressure fuel systems have a lot bugs that needs ironing out.
noswizard wrote:
My immediate reaction (based on my knowledge of petrol engines) was that excess air could NOT result in cooler EGTs but if lean burn is not a problem on diesels (as seems to be the case), then I suppose a surplus of anything would act as a coolant.
Understandable. Inversely, I can imagine a diesel expert who's never really known petrol engines would have the same misgivings about excess fuel cooling the petrol engine.
noswizard wrote:
The element that will primarily be responsible will be the nitrogen I'd guess, because it makes up the majority of air and its responsible for damping combustion in a petrol engine.
I think (and hope) it's the oxygen as that is what determines the AFR's, not nitrogen?