|
|
Post by twenglish1 on Aug 8, 2021 21:08:07 GMT -5
Been a long time since I have been around here, but I recently decided to revisit my gas turbine project from about 10 years ago!
I was in highschool at the time with very limited funds, had the engine operational, using a very minimalist setup, with a 1.5" inducer turbo. It's been sitting ever since.
Planning upgrades and just want to do a more overall professional build, might even go as far as automated startup and control.
My first plan for upgrade is the oiling system, back when I was first working on this I had used a power steering pump spun with a drill. I have heard of cars using 12v power steering pumps, and this had been my thought to set one up with a bypass loop so I can lower the pressure for starting, maybe someone here will have a better suggestion for a pump?
|
|
|
|
Post by racket on Aug 8, 2021 21:40:45 GMT -5
|
|
|
|
Post by twenglish1 on Aug 8, 2021 22:09:02 GMT -5
Good deal, I will look into that.
I am just wondering now, why was I under the impression that I needed to use a hydraulic style gear pump? That would have been why I decided to use the power steering pump, also the fact that it was dirt cheap at a junk yard.
|
|
|
|
Post by wannabebuilderuk on Aug 9, 2021 7:02:23 GMT -5
|
|
|
|
Post by twenglish1 on Aug 9, 2021 17:46:55 GMT -5
How well do the shurflo diaphragm pumps hold up to the oil and heat? Seems to be the more attractive option for me. It appears replacement parts are readily available for them too
|
|
sydneyoz
Member
Joined: June 2021
Posts: 18
|
Post by sydneyoz on Aug 9, 2021 19:31:43 GMT -5
|
|
|
|
Post by racket on Aug 9, 2021 19:49:49 GMT -5
That Shurflo has been the "original" 12V pump for our use , it has the right seal material , unless you want extended running heat shouldn't be a problem
|
|
|
|
Post by twenglish1 on Aug 9, 2021 19:58:49 GMT -5
I think that is the route I will go, also planning to include an oil cooler so I shouldn't have to worry about heat. What temp is best for the fan thermostat? Then again I guess that is dependent on the type of oil too.
I had looked at some of the Chinese gear transfer/turbo scavenge pumps on ebay, they don't seem to have too much information on pressures and flow rates at different pressures
|
|
|
|
Post by smithy1 on Aug 10, 2021 23:30:36 GMT -5
I think that is the route I will go, also planning to include an oil cooler so I shouldn't have to worry about heat. What temp is best for the fan thermostat? Then again I guess that is dependent on the type of oil too. I had looked at some of the Chinese gear transfer/turbo scavenge pumps on ebay, they don't seem to have too much information on pressures and flow rates at different pressures Oil pumps can be of many different configurations, on my Go-kart an old early Subaru oil pump driven by an electric motor is used to great effect, John designed and built the one I have....and it still works fine to this day with no modifications by me. It happily supplies plenty of 70psi + oil pressure to my GT6041 106mm inducered turbo...it has never given the slightest hint of trouble after all these years. Usually our engines don't really run long enough to cause the oil to heat up to any great degree....also, oil temps can be dependant on oil tank quantity. I have ~7 liters capacity and use a passive oil cooler on mine and it has been fine for years. Oil temps never rise above ~90C even after several back to back engine runs within an hour... which is fine for most oils. Smithy. |
|
|
|
Post by twenglish1 on Aug 15, 2021 9:52:20 GMT -5
Ended up purchasing the shurflo pump, seems like it will be the easiest option, also purchased a 1 gallon steel compressed air tank I will be using for the oil, along with a remote filter setup. How is everyone controlling oil pressure? With a bypass line? I vaguely remember when I previously worked on this, I needed to lower the pressure alot for starting.
|
|
|
|
Post by racket on Aug 15, 2021 16:45:25 GMT -5
Yep , the Shurflo has a pressure cutoff so you'll need either a relief valve or bypass dump, I prefer to not lower oil pressure for spoolup as its too easy to forget to reinstate it once spooled up
|
|
|
|
Post by twenglish1 on Aug 15, 2021 21:27:18 GMT -5
Maybe my issue was because I was using a shop vac for starting it, I was having issues getting it spinning fast enough to start, I plan to use a brushless RC motor for spool up this time around, hopefully will have better success with that.
|
|
|
|
Post by racket on Aug 15, 2021 21:36:17 GMT -5
A 1.5" inducer engine should normally start well with a shop vac blower
|
|
