Straightforward Question on Muffler Mount
10-10-2002 | 08:36 PM
#1
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From: Transylvania,
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Straightforward Question on Muffler Mount
Hello,
My Venture seems to be having a lack of power. I have had assistance from experts in setting the needle on the OS32, checking the blade pitch, setting the pitch and throttle curves, etc. and all seems to be set correctly.
I had heard of problems caused by using RTV-type sealant to mount the muffler, which I had done, so I decided to replace with a paper gasket (engine gasket material, that looks like cardboard, from the auto parts store). When I removed the muffler (MVPV0102), I noticed that the muffler opening is quite a bit smaller(~20%) than the engine opening. The folks at Heliproz said the original TT muffler that comes with the Venture kit is a piece of poop and they sent me the MVP instead (free of charge). The TT muffler opening is exactly the same size as the engine. As a result of using the MVP, a "pool of goo" has formed at the bottom of the joint between the two where the muffler opening is smaller and cuts off the bottom portion of the engine opening. This is the same at the top but of course no goo forms there because of gravity.
My questions are these:
1. Is this bad ?
2. Is the goo causing problems ?
3. Is the smaller opening restricting proper airflow ?
4. How do I tell whether there is an obstruction inside the muffler (pieces of RTV, excess goo, etc.) ? I blew into both sides and air seems to pass through fine (BTW, fuel residue sure tastes awful
).
5. If I continue to use the MVP, anything I should keep in mind when installing the gasket ? Should I use the metal gasket that came with the MVP (I don't understand its purpose) ?
Thanks for your input on this.
My Venture seems to be having a lack of power. I have had assistance from experts in setting the needle on the OS32, checking the blade pitch, setting the pitch and throttle curves, etc. and all seems to be set correctly.
I had heard of problems caused by using RTV-type sealant to mount the muffler, which I had done, so I decided to replace with a paper gasket (engine gasket material, that looks like cardboard, from the auto parts store). When I removed the muffler (MVPV0102), I noticed that the muffler opening is quite a bit smaller(~20%) than the engine opening. The folks at Heliproz said the original TT muffler that comes with the Venture kit is a piece of poop and they sent me the MVP instead (free of charge). The TT muffler opening is exactly the same size as the engine. As a result of using the MVP, a "pool of goo" has formed at the bottom of the joint between the two where the muffler opening is smaller and cuts off the bottom portion of the engine opening. This is the same at the top but of course no goo forms there because of gravity.
My questions are these:
1. Is this bad ?
2. Is the goo causing problems ?
3. Is the smaller opening restricting proper airflow ?
4. How do I tell whether there is an obstruction inside the muffler (pieces of RTV, excess goo, etc.) ? I blew into both sides and air seems to pass through fine (BTW, fuel residue sure tastes awful
).5. If I continue to use the MVP, anything I should keep in mind when installing the gasket ? Should I use the metal gasket that came with the MVP (I don't understand its purpose) ?
Thanks for your input on this.
10-11-2002 | 01:09 AM
#3
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From: Transylvania,
CA
Straightforward Question on Muffler Mount
mongo,
LOL
OK, I guess not so straightforward ? BTW, I'm headed to Laughlin, NV in hopes for some R&R and a royal flush
. Please continue to respond even though I won't be back 'til Tuesday.
TIA
LOL
OK, I guess not so straightforward ? BTW, I'm headed to Laughlin, NV in hopes for some R&R and a royal flush
. Please continue to respond even though I won't be back 'til Tuesday.TIA
10-15-2002 | 03:24 PM
#4
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From: Transylvania,
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Straightforward Question on Muffler Mount
Hi, I'm back
Sorry to see no new responses. Did I not explain things well or ...
I would be happy to try and be more clear, just let me know what part.
TIA for any help. I'd like to get the muffler back on and try again
Sorry to see no new responses. Did I not explain things well or ...
I would be happy to try and be more clear, just let me know what part.
TIA for any help. I'd like to get the muffler back on and try again
10-15-2002 | 05:04 PM
#5
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From: Transylvania,
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Straightforward Question on Muffler Mount
I just spoke with Heliproz and they said that the muffler on every Heli should have a smaller flange opening than the engine's output flange. This is because the engine needs back pressure in order to operate correctly. Not sure if this includes pipes though.
He also said the "pool of goo" is only present after the engine is shut off when the excess fuel drains from the cylinder.
Lastly, he said that the MVPV0102 does not need an additional gasket. Only the metal one that comes with it. No RTV, no paper, only the metal one. I guess the metal gasket is made of soft aluminum that seals upon compression.
Does this all sound correct ? Thanks
He also said the "pool of goo" is only present after the engine is shut off when the excess fuel drains from the cylinder.
Lastly, he said that the MVPV0102 does not need an additional gasket. Only the metal one that comes with it. No RTV, no paper, only the metal one. I guess the metal gasket is made of soft aluminum that seals upon compression.
Does this all sound correct ? Thanks
