Mufflers are the Pitts
01-26-2007 | 09:05 AM
#1
Mufflers are the Pitts
Ok, now that I have your attention 
- I have a OS .61FX that I'd like to put a pitts style muffler on and have one laying around from a ST G-90. Haven't measured the bolt pattern yet, but was wondering if it would work. What are the requirements when it comes to swapping mufflers between manufacturers and sizes. Is there a volumetric chart anywhere stating the required muffler 'volume' for a specific size engine...almost like a prop-chart?
Can I measure the standard muffler that came with my OS, calculate the volume and do the same for the Pitts style to ensure it's 'about' the same. Any issues I may be missing.
If all else fails I'll just look to buy one.
- I have a OS .61FX that I'd like to put a pitts style muffler on and have one laying around from a ST G-90. Haven't measured the bolt pattern yet, but was wondering if it would work. What are the requirements when it comes to swapping mufflers between manufacturers and sizes. Is there a volumetric chart anywhere stating the required muffler 'volume' for a specific size engine...almost like a prop-chart?Can I measure the standard muffler that came with my OS, calculate the volume and do the same for the Pitts style to ensure it's 'about' the same. Any issues I may be missing.
If all else fails I'll just look to buy one.
01-26-2007 | 01:15 PM
#2
Senior Member
My Feedback: (14)
RE: Mufflers are the Pitts
ORIGINAL: Kevlar
Ok, now that I have your attention - I have a OS .61FX that I'd like to put a pitts style muffler on and have one laying around from a ST G-90. Haven't measured the bolt pattern yet, but was wondering if it would work. What are the requirements when it comes to swapping mufflers between manufacturers and sizes. Is there a volumetric chart anywhere stating the required muffler 'volume' for a specific size engine...almost like a prop-chart?
Can I measure the standard muffler that came with my OS, calculate the volume and do the same for the Pitts style to ensure it's 'about' the same. Any issues I may be missing.
If all else fails I'll just look to buy one.
Ok, now that I have your attention
- I have a OS .61FX that I'd like to put a pitts style muffler on and have one laying around from a ST G-90. Haven't measured the bolt pattern yet, but was wondering if it would work. What are the requirements when it comes to swapping mufflers between manufacturers and sizes. Is there a volumetric chart anywhere stating the required muffler 'volume' for a specific size engine...almost like a prop-chart?Can I measure the standard muffler that came with my OS, calculate the volume and do the same for the Pitts style to ensure it's 'about' the same. Any issues I may be missing.
If all else fails I'll just look to buy one.
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You can always use a muffler that is intended for a larger engine on a smaller engine, assuming that you can mate the two satisfactorily. Just not the other way around. Nope, no issues to be missed.
Ed Cregger
01-26-2007 | 09:11 PM
#3
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Joined: Feb 2002
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From: Keller, TX
RE: Mufflers are the Pitts
Slimline makes a Pitts style muffler for the 61 FX and also for the 91 FX. The 91 is an "expanded volume" version and is far and away the best selection for both engines. It fits both equally well.
