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  #11  
Old 01-02-2006, 05:02 AM
miata_rp miata_rp is offline
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Join Date: Oct 2005
Posts: 6
Default Turbo Diesel Nozzle Sizing Revisited

Hello to Everyone,

Hi Richard, I recently viewed this post regarding the approach to use in sizing a nozzle for turbodiesel applications.
Am I correct in understanding your computation which implies 3% of mass air flow is a good starting point? i recently
installed a water injection system using aquamist nozzles and pump on a Toyota 2.4 turbodiesel with .8 bar(12 psi boost).


11.2 kg/min=395 oz./min; a 1 mm nozzle flows 11.6 oz/min; 11.6/395 oz min ==3% of mass air flow

"spindrift wrote:
My 6.5L turbo diesel flows a little over 400 CFM. What nozzle size would provide an appropriate water flow rate at maximum load? Since I have a tough time with metric conversions I would appreciate knowing the nozzle water flow rate in either oz/min. or GPH."

Richard L:

1. 1 cu ft per minute = 0.028cu m per minute
2. 400 cu ft = 11.2cu m per minute
3. 1 cu m of air weights 1Kg at 25C
4. so 400 cu ft per minute is 11.2Kg per minute.

1mm nozzle flow 330cc/min (aquamist pump) or 11.6 oz/min
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  #12  
Old 03-03-2006, 02:35 PM
Bikenuts Bikenuts is offline
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Join Date: Jun 2005
Posts: 2
Default Re: Turbo Diesel Nozzle Sizing Revisited

Quote:
Originally Posted by miata_rp
Hello to Everyone,

Hi Richard, I recently viewed this post regarding the approach to use in sizing a nozzle for turbodiesel applications.
Am I correct in understanding your computation which implies 3% of mass air flow is a good starting point? i recently
installed a water injection system using aquamist nozzles and pump on a Toyota 2.4 turbodiesel with .8 bar(12 psi boost).


11.2 kg/min=395 oz./min; a 1 mm nozzle flows 11.6 oz/min; 11.6/395 oz min ==3% of mass air flow

"spindrift wrote:
My 6.5L turbo diesel flows a little over 400 CFM. What nozzle size would provide an appropriate water flow rate at maximum load? Since I have a tough time with metric conversions I would appreciate knowing the nozzle water flow rate in either oz/min. or GPH."

Richard L:

1. 1 cu ft per minute = 0.028cu m per minute
2. 400 cu ft = 11.2cu m per minute
3. 1 cu m of air weights 1Kg at 25C
4. so 400 cu ft per minute is 11.2Kg per minute.

1mm nozzle flow 330cc/min (aquamist pump) or 11.6 oz/min
If my Maths is right 330cc/min = 4.4 GPH.
For refrence I'm using 5GPH in a 3Liter Toyota turbo diesel (12psi no cooler; 130bhp stock 170bhp with LPG)
Results are good - a real kick when I turn on the water and EGT down about 50C.
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