micphijam
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Joined: October 2017
Posts: 16
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Post by micphijam on Jul 26, 2019 8:10:51 GMT -5
Hi everyone
A quick into to myself, I'm 30 living in Sydney. I have a background in Civil Engineering working primarily in roads. I enjoy cars/bikes, waterskiing and tinkering in the garage.
I've been a lurker on this forum for a long time now, but the wife has gone home to Sweden for a month to see her family! so I've kicked off my long planned first Turbine build!
Turbo is a TV6140 of 12L 6ra1-t isuzu.
Compressor inducer: 65.5mm Compressor Exducer: 82.3mm Turbine inducer: tbc
Turbine Exducer: 76.5mm Turbine A/R: 1.54
I'm Looking for first start up on Propane, but with the ultimate goal to run on pressure injection Diesel/petrol mix.
The turbo arrived this week, and I just picked up 5 air water fire extinguishers, hoping to scratch together a few more pieces to start fabricating soon!
My key questions at this point are:
1. Is there any immediate issues on my Compressor/Turbine sizing
2. What's my fuel burn rate likely to be (gph) so I can match a oil furnace nozzle to fuel pump pressure
3. Looking at Jet Specs the flame tube length is approx 400mm, Can the spacing of the Prim/Sec/Tur holes be say 100mm apart leaving say 175mm of flame tube on approach to turbine with only small cooling holes and 25mm with cooling holes near the end cap?
Looking forward to meeting John and the other regular contributors!
Thanks
Michael
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micphijam
Member
Joined: October 2017
Posts: 16
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Post by micphijam on Jul 26, 2019 8:16:34 GMT -5
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BFTO
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Joined: February 2016
Posts: 128
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Post by BFTO on Jul 26, 2019 14:12:11 GMT -5
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Post by racket on Jul 26, 2019 18:30:44 GMT -5
G'day Michael Welcome to the "frustrating" world of building a turbine engine here in Oz ;-) Your turbo shouldn't have any problems from the wheel sizes you have . The flametube can be longer than Jetspecs recommends , but be careful about reducing diameters , the 7" fire extinguisher is a suitable outer can , I used one for my kart jetandturbineowners.proboards.com/thread/40/2-shaft-turbine-kart-build , with a 65.5 mm inducer you could reduce the flametube inside it down to ~115 mm ID as a minimum if your fuel and air presentation is good , I used an 89 mm inducer with kart . With an airflow rate of a bit over 1 lb/sec you'll be needing a bit over 1 lb/min of fuel , so , as BFTO recommended , around that 600 ml/min depending on the actual airflow and your desired max temps , maybe 200 ml/min at idle and possibly up to 750 ml/min at max .............750 ml/min = 45 lph = 12 US GPH or 10 Imp GPH . Your turbo size will need a 9kg BBQ bottle of LPG to get running , simply use the cylinder valve as a throttle but have a 3/8" ball valve in the fuel line for fast shutdown in the event of a problem . Cheers John
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micphijam
Member
Joined: October 2017
Posts: 16
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Post by micphijam on Jul 27, 2019 2:35:45 GMT -5
Thanks BFTO,John BFTO, where are you located in Sweden? My Wife comes from Orebro and is visiting as we speak! Thanks for giving me your link I will have a thorough read tonight! John, as always, your help is invaluable. I've read many posts from you and the time you take to respond to everyone, doing the calcs is amazing, thankyou! Today I rushed around collecting the pieces needed to start fabricating.I got a few mandrel bent pieces, some 5 inch 304 exhaust for my flame tube and some stainless welding wire. I also stopped by my parents place and my old man gave me an Oil pump/filter setup from chrysler 440 and some stainless plate All that driving, the brake pads on my Great Grandads old corolla wore through. So I stopped by superjunk on the way home for some pads too. Looking forward to tomorrow so I can begin fabricating. Thanks Michael
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BFTO
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Post by BFTO on Jul 27, 2019 9:43:49 GMT -5
Thanks BFTO,John BFTO, where are you located in Sweden? My Wife comes from Orebro and is visiting as we speak! Thanks for giving me your link I will have a thorough read tonight! Im located in Örnsköldsvik, ~600km north of Örebro. Good luck with your build
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micphijam
Member
Joined: October 2017
Posts: 16
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Post by micphijam on Jul 28, 2019 16:57:00 GMT -5
Hi all I’ve been looking through many posts looking for options on a fuel pump for diesel petrol pressure injection.
Pressure requirements range from 200-1000psi.. The higher the better.
So far the options if found are:
-Car EFI fuel pump (pressure too low) -Boat ‘trim’ pump (may not last with continuous use) -Aircraft fuel pump (hard to source and $$) -Power steering pump (might be the ticket?)
I’ve found Mazda 3’s have an electric power steering pump which sounds easy!
Questions,
1. Are there any other pump types out there that people have used?
2. What high pressure EFI pumps exist?
3. Any issues with power steering pump?
Thanks
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Post by racket on Jul 28, 2019 17:30:18 GMT -5
Hi Michael
I used a small 1cc/rev hydraulic gear pump initially for my bikes fuel pump with pressures up to >1,000 psi , later changed out for a bigger one as development progressed , pressures up to 750 psi , it was driven off the oil pump shaft which was powered by the small 46 cc 2 stroke engine .
Why not an EFI pump ?? they've been used successfully
Cheers John
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micphijam
Member
Joined: October 2017
Posts: 16
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Post by micphijam on Jul 29, 2019 6:08:22 GMT -5
Awesome, i guess I’m over thinking it. Reading on oil nozzles they quote as little as 40psi. Assuming my combustion chamber is at 40psi.. a pump that can do 100 psi would be the ticket
A walbro 255 or bosh 044 seem to be able to do those numbers with some buffer.
What are some options for throttle?
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micphijam
Member
Joined: October 2017
Posts: 16
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Post by micphijam on Jul 29, 2019 6:28:46 GMT -5
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BFTO
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Post by BFTO on Jul 29, 2019 9:53:26 GMT -5
Awesome, i guess I’m over thinking it. Reading on oil nozzles they quote as little as 40psi. Assuming my combustion chamber is at 40psi.. a pump that can do 100 psi would be the ticket A walbro 255 or bosh 044 seem to be able to do those numbers with some buffer. What are some options for throttle? I would suggest a manual bypass valve to bleed of the flow, simple and cant go wrong.
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micphijam
Member
Joined: October 2017
Posts: 16
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Post by micphijam on Jul 29, 2019 15:58:59 GMT -5
Like a 3 way ball valve? Attachments:
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Post by racket on Jul 29, 2019 17:57:10 GMT -5
Generally a small needle valve on one branch of a tee piece in the high pressure fuel line, the needle valve controls the amount of dumped fuel going back to the fuel tank and controlling the amount fed to the engine , ball valves are hard to "throttle" , but great as an emergency shutoff valve
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micphijam
Member
Joined: October 2017
Posts: 16
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Post by micphijam on Aug 13, 2019 5:46:33 GMT -5
Hi all I’ve made some slow progress on this over the past weeks! I’ve essentially finished the bulk of fabrication on the flame tube and piping, along with the base if the frame for first start up I was planning on placing the spark plug in the bend between ft and turbine, rather than recessed in the middle or at the ‘top’ of the FT. Would this work, and will it melt?
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Post by racket on Aug 13, 2019 16:29:19 GMT -5
It can work , but you'll probably experiece large explosions as a combustor full of gas ignites instantaneously :-(
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