Tuned Pipe question
02-15-2004, 03:59 AM
#1
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Tuned Pipe question
Hi
Has anyone had any experience with the Bolly 590r pipe and a O.S 140.
Is this Pipe used by Pattern flyers or is the 590r not up to it?.
What header lengths are being used?
does this pipe give board, non-peaky power throught out the RPM range
Thanks Anthony
Has anyone had any experience with the Bolly 590r pipe and a O.S 140.
Is this Pipe used by Pattern flyers or is the 590r not up to it?.
What header lengths are being used?
does this pipe give board, non-peaky power throught out the RPM range
Thanks Anthony
02-15-2004, 09:19 AM
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RE: Tuned Pipe question
Anthony,
The Bolly MF590R is actually a muffler, not a tuned pipe. Many people use it on pattern planes. Go to this link and you can read some performance data and comments from some users.
http://www.rcpattern.com/2cycle.htm
It is a good combination as long as you don't need the extra 200-300 rpm that a tuned pipe would give. Also, you would run it full length and it would give you a very good non-peaky power range.
The Bolly MF590R is actually a muffler, not a tuned pipe. Many people use it on pattern planes. Go to this link and you can read some performance data and comments from some users.
http://www.rcpattern.com/2cycle.htm
It is a good combination as long as you don't need the extra 200-300 rpm that a tuned pipe would give. Also, you would run it full length and it would give you a very good non-peaky power range.
02-15-2004, 06:25 PM
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RE: Tuned Pipe question
Anthony,
I have this exact setup on my 10.5lb Entropy and I love it. Transition is as smooth as silk. Since the Bolly is basically like a big muffler you do not have to worry about pipe length. I have a macs header full length followed by the Bolly pipe and the engine ran perfect right out of the box. Running a 17-12 on Powermaster 15% turning around 7700 - 7800 the engine runs so cool(temp wise) it's unbelievable. This setup is so simple, you will spend more time flying and less time dickering.
BBM[8D]
I have this exact setup on my 10.5lb Entropy and I love it. Transition is as smooth as silk. Since the Bolly is basically like a big muffler you do not have to worry about pipe length. I have a macs header full length followed by the Bolly pipe and the engine ran perfect right out of the box. Running a 17-12 on Powermaster 15% turning around 7700 - 7800 the engine runs so cool(temp wise) it's unbelievable. This setup is so simple, you will spend more time flying and less time dickering.
BBM[8D]
02-17-2004, 08:37 AM
#5
RE: Tuned Pipe question
You will have a terrible mid range, not recommended.
You may also face over heating, if your setup is not right.
check http://www.osengines.com/faq/product-faq.html#q266 .
Why not get a suitable pipe that breaths enough! There are plenty of choices available.
On the other hand, a 60-size pipe like Hatori 650 is very good for OS 91 FX. Been there, done that
ini
You may also face over heating, if your setup is not right.
check http://www.osengines.com/faq/product-faq.html#q266 .
Why not get a suitable pipe that breaths enough! There are plenty of choices available.
On the other hand, a 60-size pipe like Hatori 650 is very good for OS 91 FX. Been there, done that
ini
