having read a bit about water injection i found this site whilst looking for somthing compleatley unrelated. They seem to be having a rarther livley debate about the "possible" effects, I have to say that the maths went zooming well above my head but they have some vey interesting ideas & data here is just one post that poses a point i never thorght of
Quote"It requires less work to compress cool air than hot air.
I did the calculations comparing the amount of work it takes to do a 10:1 compression on air at 70 deg F and 110 deg F.
At 70 deg F: 88.7 BTU
At 110 deg F: 94.9 BTU
For an engine running 20 pounds of air a minute (roughly the amount of air a 5.9 liter "Ram Diesel" with a turbocharged engine runs at 1800 rpm), the horsepower the engine uses compressing air during the compression stroke is as follows:
At 70 deg F: 88.7 hp
At 110 deg F: 94.9 hp
Using some engine simulation software I compared the engine brake cylinder efficiency at the two temperatures. At 70 deg F the efficiency was 43.27%; at 110 deg F it was 42.65%. For a diesel engine flowing at 20 lbs/min this would work out to about 2.5 hp.
It appears to me that another effect of water injection may be to decrease the charge temperature and therefore decrease the amount of work the engine has to do during the compression stroke."
http://www.eng-tips.com/gviewthread.cfm/le...id/71/qid/72284
and heres a few questions from me
dose any one have any thorghts on pre & post turbo injection?
would a fuel pump & injector be a good starting point ?
or is manifold presurisation of the water resivoir more favirouble?
hope you enjoy the thread i found
enjoy & happy
loj
Quote"It requires less work to compress cool air than hot air.
I did the calculations comparing the amount of work it takes to do a 10:1 compression on air at 70 deg F and 110 deg F.
At 70 deg F: 88.7 BTU
At 110 deg F: 94.9 BTU
For an engine running 20 pounds of air a minute (roughly the amount of air a 5.9 liter "Ram Diesel" with a turbocharged engine runs at 1800 rpm), the horsepower the engine uses compressing air during the compression stroke is as follows:
At 70 deg F: 88.7 hp
At 110 deg F: 94.9 hp
Using some engine simulation software I compared the engine brake cylinder efficiency at the two temperatures. At 70 deg F the efficiency was 43.27%; at 110 deg F it was 42.65%. For a diesel engine flowing at 20 lbs/min this would work out to about 2.5 hp.
It appears to me that another effect of water injection may be to decrease the charge temperature and therefore decrease the amount of work the engine has to do during the compression stroke."
http://www.eng-tips.com/gviewthread.cfm/le...id/71/qid/72284
and heres a few questions from me
dose any one have any thorghts on pre & post turbo injection?
would a fuel pump & injector be a good starting point ?
or is manifold presurisation of the water resivoir more favirouble?
hope you enjoy the thread i found
enjoy & happy

loj