so do mine but there are different ways of cutting injectors all im trying to say. so saying that your 30% could be different then another set cut at 30%
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Big Dipper Injectors
- Thread starter IdahoRob
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so do mine but there are different ways of cutting injectors all im trying to say. so saying that your 30% could be different then another set cut at 30%
I thought bigger holes = less atomization smaller hole more atomization or more holes and smaller holes = more atomization
NOt really
someone smarter then me will answer this question thoe im but in my mind bigger hole = bigger dropplet more fuel at the same presure will atomize less. But i could be totaly wrong
NOt really
some of it is turbo size to much fuel and it will atomize less. fuel pressure has some to do with it to.
Diesel power is limited by the speed at which air can be mixed with the fuel and how well it mixes. With a fixed amount of fuel desired for a particular point in time, smaller holes have better atomization because the fuel mixes faster with air (good) but takes longer (higher PW's to get that fixed amount of fuel to the engine is not good) to enter the engine whereas larger holes allow the fuel to enter the engine faster (which is good) but mixes slower (not good) and therefore takes longer for the fuel to mix with the air. As the number of holes in the injector increases, the spacing between them decreases and with too many holes, the sprays starts to overlap and interfere with each other. This can reduce the rate at which air mixes with the fuel. Notice there is no one perfect scenario, otherwise OEM's would all be doing the same exact thing. There is a perfect mix for each engine design, but apparently that hasn't be uncovered yet. Anyone have a dyno, a lot of time and cash to figure this out for the duramax?
David
David
BIG DIPPER INJECTORS, is this my old friend lonesome George Alexander for the land of the soft shelled crab???
Diesel power is limited by the speed at which air can be mixed with the fuel and how well it mixes. With a fixed amount of fuel desired for a particular point in time, smaller holes have better atomization because the fuel mixes faster with air (good) but takes longer (higher PW's to get that fixed amount of fuel to the engine is not good) to enter the engine whereas larger holes allow the fuel to enter the engine faster (which is good) but mixes slower (not good) and therefore takes longer for the fuel to mix with the air. As the number of holes in the injector increases, the spacing between them decreases and with too many holes, the sprays starts to overlap and interfere with each other. This can reduce the rate at which air mixes with the fuel. Notice there is no one perfect scenario, otherwise OEM's would all be doing the same exact thing. There is a perfect mix for each engine design, but apparently that hasn't be uncovered yet. Anyone have a dyno, a lot of time and cash to figure this out for the duramax?
David
Thanks for the explination
BIG DIPPER INJECTORS, is this my old friend lonesome George Alexander for the land of the soft shelled crab???
If George had a hand in them then I'll bet they're good ones.
Dyno'd tested yesterday and I'm happy with the improvements.
Driveabilty is very nice and balance rates are all .0-1.0
I'll track test where I have gobs of data already on the truck with stock injectors. This will be the real test. Track day tomorrow if the weather holds.
Driveabilty is very nice and balance rates are all .0-1.0
I'll track test where I have gobs of data already on the truck with stock injectors. This will be the real test. Track day tomorrow if the weather holds.
As I noted, too many holes can cause the flow to interfer with one another and cause incomplete the combustion. Like everything, there is a trade off.
I'm interested in seeing how those injectors work with the twins. Please let me know what you think Rob.
farmer that is what volker was doing 2 or 3 various nozzle rings going out at different angles. i think small hole with higher pressure will genterate velocity and shear that should help speed up ignition of fuel.
Dyno #'s were 20+ HP improvement. Track #'s were better.
I had a 30mph headwind today, so they limited the racing to 1/8 mile. I ran mid 7.5's(7.54, 7.56, 7.57 @ 91.5-91.9mph(low to mid 1.7 60' times). This is an average of 2 mph gain in the 1/8 mile from anything I've run before. Without the headwind, not sure where it would of been.
Not sure what 1/4 miles times would of been, but I've been running mid 7.6's in the 1/8 @ 89 and running 12.0's
Rail pressure stayed in the 25,000+ range.
Good day, Cut a .000 light, won my class, than lost in the finals when all the class winners raced for the track champion. Looks like the weather will improve for more test results next week.
I had a 30mph headwind today, so they limited the racing to 1/8 mile. I ran mid 7.5's(7.54, 7.56, 7.57 @ 91.5-91.9mph(low to mid 1.7 60' times). This is an average of 2 mph gain in the 1/8 mile from anything I've run before. Without the headwind, not sure where it would of been.
Not sure what 1/4 miles times would of been, but I've been running mid 7.6's in the 1/8 @ 89 and running 12.0's
Rail pressure stayed in the 25,000+ range.
Good day, Cut a .000 light, won my class, than lost in the finals when all the class winners raced for the track champion. Looks like the weather will improve for more test results next week.
They can be but it really makes no difference. Your talking about such a small area that more holes is too close no matter what.