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turbo header mufflers

Old 03-18-2014, 06:31 AM
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paul cov
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Default turbo header mufflers

Hi guys, has any one got any info concerning these after market turbo header mufflers and what kind of sound testing (if any) has been done on four stroke nitro engines (os fs 200), measurements in db would be ideal, many thanks,

Paul.
Old 03-18-2014, 08:22 AM
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w8ye
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I've used Turbo Headers for years. They typically give you a couple hundred rpm with the sound little different from the original muffler
Old 03-18-2014, 10:52 AM
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paul cov
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Hi W8ye, thanks for reply but unfortunately I fly in a noise sensitive area over the pond and engine noise is monitored regularly by the local authorities, and they measure the noise in decibels, anything over 82db @ 7mtr is a no . .no!, this is going to be quite a challenge as I've got a GP super Stearman 120 with O.S. FS 200 up front, going to have to tinker with prop size and pitch again I think, it would be really good idea if RCU could come up with stats relating to this turbo header muffler with reference to different size engines and noise measured in decibels purely as a guide, cant seem to find any reference to this situation anywhere on net?.
Old 03-18-2014, 01:54 PM
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Originally Posted by paul cov View Post
Hi W8ye, thanks for reply but unfortunately I fly in a noise sensitive area over the pond and engine noise is monitored regularly by the local authorities, and they measure the noise in decibels, anything over 82db @ 7mtr is a no . .no!, this is going to be quite a challenge as I've got a GP super Stearman 120 with O.S. FS 200 up front, going to have to tinker with prop size and pitch again I think, it would be really good idea if RCU could come up with stats relating to this turbo header muffler with reference to different size engines and noise measured in decibels purely as a guide, cant seem to find any reference to this situation anywhere on net?.
Just mounted a Turbo Header muffler on my Saito 125, which is mounted in a Hangar 9 Christen Eagle II. Sorry, can not give you any DB specs for this muffler. Could be wrong but PERSONALLY, I think that you will have a difficult time finding any published DB specs on the net. Unless Turbo Header has specs of their own.

Good luck with your noise problem.
Old 03-18-2014, 02:02 PM
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Granpooba
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Following paragraph was taken from RCU in regards to Turbo Header muffler:

After we made sure everything was securely assembled we went ahead and ran up the motor and put a tach on it. Ashley is a sport flyer and is beginning to learn a little IMAC so the Saito is equipped with an APC 16x8 composite prop. Before and after tach testing confirmed the manufacturers claim of a 200 to 300 RPM increase. We actually measured a 250 RPM difference. I also liked the throaty rumble that the TurboHeader gave while idling. Once up to flying RPM the motor does sound a bit different than a stock four stroke motor but you really have to hear them back to back to notice a difference.
Old 03-18-2014, 02:17 PM
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Paul what is written above pretty much sums it up and has been my experience using two turboheaders.They look a lot nicer than a standard saito muffler and are much lighter.Stock os mufflers win the ugly design competition hands down.

If you have room inside the cowl you can run a length of stainless flex tube(itself a muffler)and then the turboheader.I can't believe you are restricted to 82db's..you can fart louder than that.Considered immigrating?
Old 03-18-2014, 05:02 PM
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paul cov
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Ok old fart, and thanks for your input guys, if I get chance I will put together some noise test figures on hear, testing my o.s. and saito engines using the turbo header on all of my engines, there is obviously a need for it, should be interesting, and trust me (old fart) if I eat beans then even you will hear it all the way over the pond, that's not thunder ya know!!, yeah and I agree 82db does take the p...ss abit, but we have to abide by local laws otherwise they have the power to close our field, annoying really when you consider all the other noise making things we got going on over hear, to many do gooders!.
Old 03-18-2014, 05:13 PM
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paul cov
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Hi Granpooba, ive already asked Jim @ rc specialities and he does,nt have any noise test specs on his turbo headers as yet.
Old 03-19-2014, 05:39 AM
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Originally Posted by paul cov View Post
Hi Granpooba, ive already asked Jim @ rc specialities and he does,nt have any noise test specs on his turbo headers as yet.
Thought so ...........
Old 03-19-2014, 08:07 AM
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You would think that after several years now, someone would have taken a DB meter and measured the noise levels of a Turbomuffler as compared to the stock OEM muffler. The manufacrturer could have done it too. Now granted, the engine brand and displacement affects the noise levels as does using different props as well. Plus the air frame could be less or more noisy too.
Old 03-19-2014, 08:07 AM
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Paul, does your OS 200 pass the test now?

Have you considered cheating? Or assigning gate guard duty to someone so you know when to pull out your electrics when the noise police show up?
Old 03-20-2014, 02:13 AM
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Paul is right..we should be way past cheating anything.I'd like the inspector to be gummint appointed for starters.Then we'll have a new noise test where he has to stand in front of a running warbird with machine guns and all in working order.Then we look at eachother and say...what do you reckon guys?
Old 03-20-2014, 02:23 PM
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I don't have a DB meter but to my ears, a turbo header is not louder than the stock muffler.

I also know there is a certain realm of operation where the Turbo Muffler has the 200+ rpm gain over the stock muffler using the same prop. Like for example using a APC 16 X 8 on a Saito 125 to keep the the rpm and therefore noise level down with the stock muffler - I doubt you are going to have a gain in rpm using a Turbo Header.
Old 03-20-2014, 04:47 PM
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I don't know why, but that noise test idea reminds me of the scene from 1941 where the General asks John Belushi to fire his guns on his P-40.
Old 03-21-2014, 01:04 AM
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Rudolph Hart
 
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Yeh call me crazy that was what i thought of when i wrote that.I'm also a big elmer keith fan and have a 1936 book of his i keep right beside the handloading manuals.

Paul,did you make a decision yet on your muffler set up or would it be cheaper in the long run to just get the hell outta there?
Old 03-29-2014, 11:02 PM
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Ernie Misner
 
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I don't have a Turboheader muffler yet but am about to order one for my 82 and one for my 100. Didn't I hear that they don't have a baffle? If so, doesn't sound good for a noise sensitive field. Any loss in muffler/tank pressure with the Turboheader? I like the idea of being lighter because of less vibration and stress on the header pipe itself.
Old 03-29-2014, 11:10 PM
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Ernie the turboheader muffler on my 82 does run a very good baffle.On the other hand my 220 turboheader appears to be straight thru.
Old 03-30-2014, 07:21 PM
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Mine for the smaller engines does have one.
Old 04-05-2014, 06:24 PM
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bob62
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I had one on a 150 Saito, the baffel came loose and plugged the muffler. Contacted Jim and he sent me a new one and it has no baffel. I can not tell the difference between no baffel and the one that had the baffel.
Old 01-24-2018, 08:32 AM
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I just came across this thread. The TH12x1A TurboHeader was tested and at full throttle is 110db at 10 feet. Older versions of some of our mufflers had a baffle. All models now do not have a baffle. Call me if you have any baffle issues.

Jim

Last edited by rcspec; 01-24-2018 at 08:38 AM.
Old 01-26-2018, 10:39 PM
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Rudolph Hart
 
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I'll take this opportunity to thank you for the beautifully made turbo headers for my saito 82 and 220 jim,cheers
Old 01-27-2018, 05:17 AM
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Thank you, Old Fart! We have a great product. We now have a dealer down your way. Albury RC Models.

Jim
Old 01-27-2018, 11:12 PM
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Rudolph Hart
 
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He's a four day motorcycle ride from where i am but it's a good excuse to saddle up

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