Surface cleaner decision

For the guys running 8 gpm 4 nozzle on there whisper wash classics. have you tried different size orifices along with different fan degrees. like maybe #3 25 degree outside and #3.5 15 degree inside?? thatd be what 1500-2000 psi roughly?
 
The 4 nozzle bar was made for 25 degree nozzles, it's the only ones that should be used. Using a 15 degree on one side and 25 on the other would (I think) cause stripping with the higher impact of the 15 degree nozzle...plus there's no reason to, the thing cleans and moves super quick ....oh 15 degree nozzles could also etch some concrete. As far as orifice size you could go up to lower pressure if you needed to.
 
dalmatianlawncare said:
For the guys running 8 gpm 4 nozzle on there whisper wash classics. have you tried different size orifices along with different fan degrees. like maybe #3 25 degree outside and #3.5 15 degree inside?? thatd be what 1500-2000 psi roughly?
Click to expand...

I just tested that out yesterday. I put a #4 on the outside and a 3.5 inside. 25 degree tips. It worked well. The driveway wasn't that dirty, so I will have to see on the next few driveways. But overall I didn't see any uneven cleaning whatsoever. I was using a 24" Whisper Wash Aqua Pro with 10 gpm.

I put the #4 on the outside because I wanted the one with the most impact doing the initial cleaning.
 
Solopressure washer said:
So what are some of the modifications to the classic? 8 GPM with 2 four gall 25 deg nozzels. Floods out the classic. Are some cutting relief paths in the brushes or what? Not to happy with it so far. Also noticed the shell is 19" but the spray bar is 17" not able to get as close the the edge as I am used to. Thanks for the help.
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Hey Randy.
That's the first thing I noticed about the classic, the bar is really 17 inches. You have to lift it at an angle to get close to the edge. Just try not to hit anything, the bar is really soft. I never had a bog down problem with my classic or aqua pro. Only when hitting puddles. When you say 4 gall nozzles I assume you mean #4 nozzles. right?
For an 8 gpm machine @3500 you should be running 4.5's, for 3000 psi you should be running 5's (9.5 rounded up) The number 4 is the orifice size, it is based off of 4000 psi. an 8 gallon machine rated at 4000 psi takes #4 nozzles. If your machine is rated at 3500 or 3000 and you are using #4 nozzles, you are bypassing between .8 and 1.2 gallons. I don't understand how you could be having flooding problems.

Also are you weighing the classic down? It should float and water comes out the bottom.
Oh and you are removing the injector right?
 
I am use to the lifting the edge with the hammer head but thanks for the review, I do have the 4.5 nozzles at 25 degrees, and even cut it back today to 2800. There is so much water building up inside and bogging down the bar, this is on flat ground no puddles. Had to lift up o SH 1/8 inch too allow water to get out. Then it worked ok. After the flat this am and a cracked ball valve for the chemical hose it was a good one, till a borrowed pump took a dump. Big job 27952 square feet.
 
Wow. I don't understand. I was a little bewildered when I got my classic because of the gap on the edges, then I got used to it. I haven't even touched my hammerheads, since. I could tell immediately that I was getting a better clean and zero lines, and now I love it. Maybe you got a lemon. I never had a flood issue with my classic. Also with jobs that big, you might want to switch to a 24" SC. The Aqua Pro has a 22.75" bar. That extra 5+ inches really add up on big jobs.
 
Ralph Q said:
Hey Randy.
That's the first thing I noticed about the classic, the bar is really 17 inches. You have to lift it at an angle to get close to the edge. Just try not to hit anything, the bar is really soft. I never had a bog down problem with my classic or aqua pro. Only when hitting puddles. When you say 4 gall nozzles I assume you mean #4 nozzles. right?
For an 8 gpm machine @3500 you should be running 4.5's, for 3000 psi you should be running 5's (9.5 rounded up) The number 4 is the orifice size, it is based off of 4000 psi. an 8 gallon machine rated at 4000 psi takes #4 nozzles. If your machine is rated at 3500 or 3000 and you are using #4 nozzles, you are bypassing between .8 and 1.2 gallons. I don't understand how you could be having flooding problems.

Also are you weighing the classic down? It should float and water comes out the bottom.
Oh and you are removing the injector right?
Click to expand...

I will be retesting this weekend, GPMS Pressure and so on. Thought I understood nozzle's but not now.
If at 8gpm why the extra .5 on t nozzle?
 
Solopressure washer said:
I will be retesting this weekend, GPMS Pressure and so on. Thought I understood nozzle's but not now.
If at 8gpm why the extra .5 on t nozzle?
Click to expand...
To get the rated pressure. If your unloader is set at 3500, you will start bypassing with #4's because a #8 nozzle, or 2 #4's gets you 4000 psi on any chart. Since we know that, to reduce pressure, we use a bigger orifice nozzle. Hence the added .5.

The orifice size for 3500 psi is 8.5 round it up to 9 for even tips
http://www.barens.com/cgi-bin/calc
 
Ralph Q said:
To get the rated pressure. If your unloader is set at 3500, you will start bypassing with #4's because a #8 nozzle, or 2 #4's gets you 4000 psi on any chart. Since we know that, to reduce pressure, we use a bigger orifice nozzle. Hence the added .5.

The orifice size for 3500 psi is 8.5 round it up to 9 for even tips
http://www.barens.com/cgi-bin/calc
Click to expand...
will test and retest this weekend. Thanks for the help. Have to walk away from things every now and then and then they make sense.
 
Solopressure washer said:
will test and retest this weekend. Thanks for the help. Have to walk away from things every now and then and then they make sense.
Click to expand...
Yeah it sort of makes sense and sort of not make sense. How can you have 8 gpm and have to use different nozzle sizes. It is because the unloader bypasses at the rated pressure. You can still use #4 nozzles but you will lose flow, and cause the unloader to work overtime. I prefer full flow always, even if it means losing a little pressure. You still lose flow and pressure when using the correct nozzle size because of hose length.
 
Ok. Operator error. Got to the testing this after noon. Found 1 bolt missing from front of pump legs the other loose. replaced missing bolt, cleaned and tightened the others and readjusted the belts. test showed 9.5 GPM. Tested the classic with a fifty 50 hose with the 4.5 nozzles. Works good now or at least on my drive way. Opened the cover to the buffer tank and am seeing bit of bypass from the 5 GPM washer. Will start doing better upkeep in the future. Thanks for the help Ralf, hope to see you I Orlando.
 
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