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Post by Fox on Feb 4, 2012 11:44:57 GMT -5
Makes sense. While I wait for the new carb I'm gonna keep trying to make a "good" carb. Maybe I need to clean out the ACV valve(s) I suppose a can of carb dip isn't too much money to invest if it will restore these carbs.
I just looked at video of a few ultrasonic cleaners in action. They put a carburetor into one for a minute and it comes out pretty clean looking but I'm not sure it's worth the money. One guy uses mineral spirits in there. HF sells a cheapy and a not so cheapy one but I kinda like this guy's approach cause he's using the right chemical and you can buy a palm sander for $10 at HF:
Looks like a lobster pot:
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Post by 90GTVert on Feb 4, 2012 12:18:54 GMT -5
That's a cool agitation cleaner, but I don't believe it's anywhere near ultrasonic. My understanding is that ultrasonic is above 20,000Hz. 20,000RPM isn't the same as 20,000Hz. Hertz is a measure of cycles per second, where RPM would be revolutions, or I guess call them cycles for this sake, per minute. So 60RPM would actually be 1Hz. 20,000RPM / 60 = 333.33Hz ... very far short. If this is correct, you need to find something capable of 1,200,000RPM to enter into ultrasonic. Info about how ultrasonic cleaning works... "In an ultrasonic cleaner, the object to be cleaned is placed in a chamber containing a suitable solution (in an aqueous or organic solution, depending on the application). In aqueous cleaners, the chemical added is a surfactant which breaks down the surface tension of the water base. An ultrasound generating transducer built into the chamber, or lowered into the fluid, produces ultrasonic waves in the fluid by changing size in concert with an electrical signal oscillating at ultrasonic frequency. This creates compression waves in the liquid of the tank which ‘tear’ the liquid apart, leaving behind many millions of microscopic ‘voids’ or ‘partial vacuum bubbles’ (cavitation). These bubbles collapse with enormous energy; temperatures and pressures on the order of 5,000 K and 20,000 lbs per square inch are achieved [6][citation needed]; however, they are so small that they do no more than clean and remove surface dirt and contaminants. The higher the frequency, the smaller the nodes between the cavitation points, which allows for cleaning of more intricate detail. Ultrasonic transducers showing ~20 kHz and ~40 kHz stacks. The active elements (near the top) are two rings of lead zirconate titanate, which are bolted to an aluminium coupling horn. Transducers are usually made of piezoelectric material (e.g. lead zirconate titanate or barium titanate), and sometimes magnetostrictive (made of a material such as nickel or ferrite). The often harsh chemicals used as cleaners in many industries are not needed, or used in much lower concentrations, with ultrasonic agitation. Ultrasonics are used for industrial cleaning, and also used in many medical and dental techniques and industrial processes." Taken from here... en.wikipedia.org/wiki/Ultrasonic_cleaning |
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Post by Fox on Feb 4, 2012 12:49:51 GMT -5
Good info. Thank you! So the redneck way isn't a true ultrasonic cleaner but I'm thinking he's got the right idea in that vibrating the solution (and the carb) will do a better job than just immersing the carb body in the carb dip static but I'm no chemist. Also, I did some searching and found a forum thread where one guy (magnaman) says the EPA made the makers of that carb dip stuff change their formula a while back so it's less effective now. I love the last post of the thread. forums.sohc4.net/index.php?topic=83795.0 |
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Post by 90GTVert on Feb 4, 2012 13:04:09 GMT -5
I think the EPA has changed a few (or maybe many) products in past years from chemicals to their propellants.
I agree, I think it's a cool thing. I wasn't trying to pick it apart. I like the ingenuity in his idea and I think it would be better than just soaking. Just didn't want you to think you really had an ultrasonic cleaner when it was all done.
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Post by jmkjr72 on Feb 4, 2012 14:07:07 GMT -5
yeah the epa has forced changed in brake carb and other cleaners that you use in your shop
most are so weak now that most of the time i just use good old starting fluid
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Post by Fox on Feb 13, 2012 23:11:39 GMT -5
Okay so I got the new carb and installed it and the scooter runs now. I had to restrict the air box to get it to rev up all the way. I'm thinking that all the carbs I have have bad diaphragms or something. Anyway, thanks for all the input.
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Post by stepthrutuner on Feb 14, 2012 0:02:12 GMT -5
That's interesting. When you fixed the problem, whatever it was, the air requirements went totally in the other direction. :stars:
Sorry I forgot about this thread. Glad you got to the bottom of it.
I loved that redneck agitator. :thumb: .... and the info on ultrasonic cleaning principles was most interesting.
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Post by 2strokd on Feb 14, 2012 9:12:42 GMT -5
Sounds like an air passage is plugged in the other carbs making it run richer.?.
Im with you Dave. Ive switched carbs around on 49cc fours and they ran fine. This was after trying everything else first. Switch the carb and bingo. Ran great! Sometimes i have been able to take one of the old "bad" ones and it worked fine on another scoot.
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Post by Fox on Feb 14, 2012 22:22:46 GMT -5
Yeah Robert! It's friggin' weird how they act sometimes. Today I had a customer with a torn diaphragm so I installed one of my old diaphragms from my carb bone yard in his carb and it ran perfect so it must be that every single one of my old carbs has a clog somewhere that carb spray won't free up.
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jlb71
Scoot Member
Posts: 65
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Post by jlb71 on Feb 14, 2012 22:53:15 GMT -5
Hey fox I bought that same kit last year put it on a Schwinn VAL.I bought the big valve head from scrappy the problem I had was real bad kickback it keep killing my kick start idler gear and kickstart shaft so I did a compression test on it 210 PS I kinda high.Took the cylinder to a friend he had to bore the cylinder there wasnt enough clearance for piston in the cylinder.You might want to check that even though you got it running pretty good.Just wanted to share my experiance with that same kit.
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Post by Fox on Feb 14, 2012 23:49:17 GMT -5
Hey fox I bought that same kit last year put it on a Schwinn VAL.I bought the big valve head from scrappy the problem I had was real bad kickback it keep killing my kick start idler gear and kickstart shaft so I did a compression test on it 210 PS I kinda high.Took the cylinder to a friend he had to bore the cylinder there wasnt enough clearance for piston in the cylinder.You might want to check that even though you got it running pretty good.Just wanted to share my experiance with that same kit. I guess you didn't read the whole thread cause it ran great with the BBk for twenty minutes and then I parked it for a week and that's when the problems started. I tried multiple carbs with the BBK and it just wouldn't run right so I put it back stock and it still ran crappy with multiple carbs. so I finally got a new carb and it runs properly again. I'm thinking about trying the BBK again with the new carb just for shits and giggles.  |
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jlb71
Scoot Member
Posts: 65
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Post by jlb71 on Feb 15, 2012 1:09:43 GMT -5
Sorry I was just saying it would be a good thing to have your cylinder checked.I've read on other forums about issues with the bore.I did get mine to run pretty strong though me and my gf could cruise around town 40 to 45 MPH know problem combined weight about 350lb and take off was pretty good with the two of use on my scoot.I will have to checkout the rest of your post its great how everyone here are here to help one an other.
This forum is number 1 :rockon:
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Post by Fox on Feb 15, 2012 1:42:43 GMT -5
This forum is number 1  Yeah it is! Best bunch of guys around. Where one of us lacks there's another member that can fill the void and nobody expects anything in return. :spark: |
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