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Post by azwood on Apr 14, 2018 20:24:04 GMT -5
Hi I'd still be inclined to also fit some sort of secure "screwed" metal fixing for the tubing rather than just relying on the epoxy at the ends , the epoxy should be OK for sealing along the tubes, but the combination of high temperatures ( >150 C ) and differential expansion rates might conspire against your especially if using very high pressure start air , the "recoil" could see tubing come loose , to be on the safe side a few metal clamps might be worth thinking about . Cheers John Yeah sounds like a good safety measure thanks
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Post by azwood on Apr 14, 2018 22:19:32 GMT -5
Seems break line fittings are a good option
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Post by racket on Apr 14, 2018 23:29:26 GMT -5
They're ideal.
I'd like to have used them for a lot of my jobs but didn't have the special tooling required for the flaired joints , so just use the metal brake line with airline "olive and nut", which in small sizes are OK for most jobs.
Cheers John
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Post by azwood on Apr 15, 2018 20:20:35 GMT -5
They're ideal. I'd like to have used them for a lot of my jobs but didn't have the special tooling required for the flaired joints , so just use the metal brake line with airline "olive and nut", which in small sizes are OK for most jobs. Cheers John Sounds good
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ausjet
Veteran Member
Joined: May 2013
Posts: 133
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Post by ausjet on Apr 17, 2018 14:06:24 GMT -5
Been looking at electric oil pumps online can't find one that's ment for continuous use Look at the oil pump that Anders is using as well as Andy Morris, i will use such also, it is called Marco UP 12, plenty of pressure and flow AND it has been used in Anders bike and in Andys HX MONSTER kart,record holding kart! That igniter unit i have i bought from Smithy....they can be found here and there,i simply asked Brett if he had any and he did! Cheers /stephan Hey Stephan I’ve been looking at the Marco pumps, the UP12 seems very underpowered at a max of 2bar. The UP10 has a max of 7bar. Is it definitely the UP12 that you fellas have been using? Cheers, Keith
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Post by stoffe64 on Apr 17, 2018 15:45:12 GMT -5
Hello Keith! I looked at Anders Johanssons Diy turbine bike build thread and yes it is Indeed the UP 12 pump, UP 12 oil it is called, i believe that Andy Morris uses the same type of pump in his monster karts. Cheers /stephan
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Post by azwood on Apr 22, 2018 2:57:21 GMT -5
Found some time to play with the air start over the weekend ended up useing compression fittings as you guys do nice and easy just need to tig in the quick release connector in place I'm just worried it may be a restriction.tryed the tubes with the compressor they work well with no drag from the oil pump so I'm hopeing that with a skuba tank there will have plenty of power.
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Post by azwood on Apr 22, 2018 16:36:41 GMT -5
Does anyone how car starter motors go if there ran continuously for a oil pump motor?
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Post by racket on Apr 22, 2018 17:42:15 GMT -5
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jetric
Veteran Member
Joined: December 2014
Posts: 132
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Post by jetric on Apr 22, 2018 17:46:16 GMT -5
Hi, I developed the scuba tank air start system that us Diygt guys use over here in the UK and I have been using it on my own jet kart for the past eight years, I can manage to start my engine that has got a 82mm inducer (schwitzer S4) in under two seconds and easily get around five to six starts per 15 liter scuba tank. You would of been able to use just one of your air discharge ports there is no real need to use three. Don't bother with a regulator on the scuba tank just use full bottle pressure and make sure you use high pressure hose and end fittings that can cope with 232 bar of pressure such as hydraulic hose and machine crimped end fittings on the hose this is only encase the hose or discharge ports become blocked, normally there will only be around 300psi pressure in the hose during starting due to the restrictor in the scuba tank valve. Make sure that the part of the quick release connector that shuts off when disconnected is fitted to the engine discharge port side so that when you disconnect your air start hose from your engine after it has been started no compressed air from the compressor will leak out of your discharge ports, Also please remember to shut the valve off on the scuba tank before disconnecting the quick release connector!!! you will only forget to do this once and then it will be a trip to the hospital. When I first developed the scuba air start on my engine I did used to use the regulator on the scuba tank this was set to 100psi and it did work but it used to take a while to start the engine with cold oil then i tried it without the regulator and wow the difference was unbelievable!! Have fun but keep safe, Richard. Found some time to play with the air start over the weekend ended up useing compression fittings as you guys do nice and easy just need to tig in the quick release connector in place I'm just worried it may be a restriction.tryed the tubes with the compressor they work well with no drag from the oil pump so I'm hopeing that with a skuba tank there will have plenty of power.
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Post by azwood on Apr 22, 2018 17:46:34 GMT -5
They seem nice and cheap too
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Post by racket on Apr 22, 2018 18:21:22 GMT -5
Yep ,they're more than adequate for our usage , probably the best pump I made is on Smithies GT6041 kart jetandturbineowners.proboards.com/attachment/download/181 jetandturbineowners.proboards.com/attachment/download/182 where I replaced the output end cap of the motor with the coupling block to the Subaru oilpump, I think the "axial" mounting is better than using a chain drive and sprockets . If I did another one I'd use the original sprocket and have it fit into a "female" coupling that drove the oilpump , it'd save some fiddling around, but the end result would be a tad longer overall. Make sure you get a motor with mounting feet as they're easier to blot down .
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Post by azwood on Apr 22, 2018 18:52:12 GMT -5
Hi, I developed the scuba tank air start system that us Diygt guys use over here in the UK and I have been using it on my own jet kart for the past eight years, I can manage to start my engine that has got a 82mm inducer (schwitzer S4) in under two seconds and easily get around five to six starts per 15 liter scuba tank. You would of been able to use just one of your air discharge ports there is no real need to use three. Don't bother with a regulator on the scuba tank just use full bottle pressure and make sure you use high pressure hose and end fittings that can cope with 232 bar of pressure such as hydraulic hose and machine crimped end fittings on the hose this is only encase the hose or discharge ports become blocked, normally there will only be around 300psi pressure in the hose during starting due to the restrictor in the scuba tank valve. Make sure that the part of the quick release connector that shuts off when disconnected is fitted to the engine discharge port side so that when you disconnect your air start hose from your engine after it has been started no compressed air from the compressor will leak out of your discharge ports, Also please remember to shut the valve off on the scuba tank before disconnecting the quick release connector!!! you will only forget to do this once and then it will be a trip to the hospital. When I first developed the scuba air start on my engine I did used to use the regulator on the scuba tank this was set to 100psi and it did work but it used to take a while to start the engine with cold oil then i tried it without the regulator and wow the difference was unbelievable!! Have fun but keep safe, Richard. Found some time to play with the air start over the weekend ended up useing compression fittings as you guys do nice and easy just need to tig in the quick release connector in place I'm just worried it may be a restriction.tryed the tubes with the compressor they work well with no drag from the oil pump so I'm hopeing that with a skuba tank there will have plenty of power. Thanks for that info
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Post by azwood on Apr 23, 2018 4:29:22 GMT -5
The reason I used 3 lines is to have a nice even load on the wheel
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Post by racket on Apr 23, 2018 4:35:10 GMT -5
Yep , that was the reasoning I used for both my 10/98 and 12/118 engines systems , though I did test my TV84 engine ~20 years ago with a single hole and the oxy bottle to see what would happen, she spooled up nicely , but decided in the end that the leafblower was a cheaper option :-)
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