Neil,
The very best tool I found for turbo selection is BorgWarner's Matchbot. The tool will let you input engine information, OAT, altitude fuel type, multiple rpm points and many other variables. There are four tutorial videos near the bottom of the main page. I watched each video multiple times. The tool not only dials in the turbo size but provides guidance for the other system components. Once you are satisfied with the numbers you can scatter plot the Corrected Mass Airflow and Pressure Ratios on other manufactures compressor maps.
Intake temperature is also calculated so you can make an informed decision about the need for an intercooler. I think keeping the intake temps below 140F is a good idea. A properly sized and working wastegate will keep you from over speeding and you need a blowoff valve to release pressure when you close the throttle.
You can save the URL for each boost scenario. Opening the URL reloaded the last data set. I ran multiple scenarios form sea level to 18K, plotted the normal operating range and extremes I would never intentionally operate at. Like 7200 rpm at 18K with 5 PSI.
http://www.turbos.bwauto.com/aftermarket/matchbot.aspx
I ended up with purchasing a different model but the TO4-50 to 60 range is a good match if the other system components are size properly. I recommend reading every one of Dave Leonard’s turbo posts. EGT management appears to be critical.
Bobby
http://www.turbos.bwauto.com/aftermarket/matchbot.aspx
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
Sent: Sunday, December 02, 2018 11:13 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Hey Neil,
Charlie,
At this stage I have to start somewhere as my
technical knowledge of Turbos on a scale of 1-10 is probably about -5.
Have lived with turbos all m,y life and know how to try and prevent
failure as it always costs about $2500 just to get one exchanged. Then
there was the time one pumped about 25 litres of oil into the exhaust
system -- impossible to get out. So just drove with a new turbo and a
blue smoke screen behind me that attracted every fire engine in the
country. It took years to get all the oil out!
So just looking at fitting a turbo to my renesis to overcome the density
altitude on hot days. Plus an education will not go astray.
Offers??? Neil.
On 12/3/2018 1:24 PM, Charlie England ceengland7@gmail.com wrote:
> Were you just trolling ('over there') about turbo recommendations? If
> you're looking for real info, you might want to try somewhere else. ;-)
>
>
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