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Todd, Thanks for that as was exactly what I was thinking. Have tried many workshops in OZ and either ignorant or don’t want the job. Freight listed to the US and back can be $300 each way. Makes the $100 cheap. Will contact them, and see what eventuates as way down the path of fitting the stock turbo, really do not want to start again. Done that too many times before. Thanks, Neil. From: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Wednesday, August 5, 2020 9:56 AM
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: [FlyRotary] Re: Turbos for 13b's in aircraft Hi Neil; I talked to BNR today on the phone about my needs and wants. He said it was about a 3 week turnaround time on the turbo, so I said maybe later this fall. So he suggested that for a $100 dollar core charge, he could just get one there and modify it for me and I can keep this one. That's kinda a no-brainer, because it would cost me that much to ship mine down to him. Then I'm only paying shipping one way. So for you that would make even more sense.
Dave and all, Finally great advice that I cannot get anywhere else as mention “Aircraft” and the phone line goes dead. The oil cut off is great as well for I have personal experience with a turbo failure in a truck – you would not believe the amount of oil that can fit into an exhaust! That took more time to clean than replacing the turbo-- all 5 gallons of it. Will see what I can source here in OZ as to a turbo , as the freight both ways to the US is murderous. Happy with the mod cost which will be $1300 Oz dollars. Still a cheap turbo. Freight I am guessing will be another $300 at least. Neil. Hi Dave; What did you use for a shut-off valve for your oil? Kelly, you are right. I even mentioned the TO4-E50 in my post above. Mark, its not about the horsepower so much as keeping the turbo in its proper operating environment for the conditions you are going to be giving. You mentioned "300-400hp" in your post, but it seem that perhaps you dont have a specific target in mind. Thats fine, but you are not going to land much above 180hp unless you have a specific target and a plan to achieve it. The stock hitachi you mention is a T3 turbine. It and the 2nd gen 13b it ran with were only rated at 200hp in the car - and only for short bursts. I did what you are thinking about doing. I ran the stock turbo to see what I would get. I was making a little over 200hp and the turbo lasted for about 70 flight hours. Looking at its turbo map, the impeller was running over 100k RPM. It's very surprising it lasted 70 hours. It probably only lasted that long because most of the time I was not running full power. The turbo imploded on my first long cross country. I was almost home and decided to let it loose a little. I was running about 30" MAP at 17.5k altitude. It lasted about 30 min doing that. My advice, if you want to experiment with turbos, is to install a shut-off valve on the oil feed line to the turbo. I now have one in my installation. When the turbo goes it will be hemorrhaging oil into the exhaust. Without a shut-off valve, you will run out of oil before you can get very far. With the valve, you can continue to fly n/a as long as you need. Play around with that spreadsheet I sent you. Make up numbers that are realistic for how much boost at what altitude you realistically want to fly, then find a turbo to fit those parameters. You can cut and paste various turbo maps onto the spreadsheet. They are available on the internet but most of the relevant ones are there on the spreadsheet. Try to keep the turbo in its center island of efficiency while staying away from the 'surge' line. Also, keep the RPM under 60k if possible. You will find that Kellys suggestion of the TO4-E50 is a good choice and readily available. You will also see that the stock T3 does not belong in an aircraft. Group, I have no running experience yet but when I purchased my turbo I settled on a "Turbonetics" TO4-E50 with a 1.15 a/r turbine housing so as to not get into any overspeed problems..........FWIW Dave, Just how much extra Hp do you think you got withy the upgraded Turbo? I will be happy with 250 to 300 HP from the stock Hitachi. Am I off with the fairys having this expectation? Neil. James, I had my stock housing upgraded to TO4 by BNR Supercars. They also have options for the Renisis. http://bnrsupercars.com/ Cost is $950 for the level 4 upgrade. Makes a nice tight fit. I had a big discussion about Turbo maps that you can find in the archives. I settled on a TO4-H or TO4-E50 to top out around 350hp at sea level. Attached is a turbo excel spreadsheet that you can use to evaluate various parameters in selecting a turbo. James, 2 flying that I know of – Todd Bartrim and Dave leonnard. Think they have the standard RX7 Hitachi turbo. Just been around the world trying to get an affordable turbo for my renesis which does not exist if you talk to drag racers etc., Quotes between $4500 and $6500. Bought 2 hitachi turbos for $125 and one looks set to go while the other will need bearings. There was an offer of one in south Africa for freight only. Would be a bargain. Just hooking mine up now, but as usual much to go that I have not factored as usual. Finally found an intercooler that may fit. Best, Neil. Does anyone out there have any recommendations for a turbo (brand and size) for a 13b in an aircraft? 300-400 hp range. Reasons or experience is appreciated! Auto racers have their needs but are different from aircraft... or so I've heard. My 13b's are nearing the decision stage for turbos. Thanks, James Whitehurst
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