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HelicopterHIROBOOther › Evo 50 muffler
08-09-2007 04:37 AM  10 years agoPost 1
DAVE62278

rrApprentice

Ridgetown, Ontario,​Canada

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I'm trying to find out how the Hatori SAB50 HP JK fits on an Evo 50. This is the one piece muffler for the 50 hyper. I've been told that the front portion extends 77mm from the mounting flange/stand-off. By some quick measurement, this seems like I might have to do some major canopy trimming, which I hope doesn't have to be done. I've looked at a lot of galleries trying to see if I could find a picture of an Evo/SAB50HP combo but didn't have any luck.
Any info on the fit or picture of this combo would sure help me decide on which hatori to get.

Thanks,
Dave

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08-09-2007 07:40 AM  10 years agoPost 2
naked painter

rrVeteran

Mid glamorgan uk

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Hi

I've now got a hatori 521 fitted and had to trim the canopy slightly. No real problems encountered.

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08-09-2007 01:39 PM  10 years agoPost 3
DAVE62278

rrApprentice

Ridgetown, Ontario,​Canada

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naked painter,
Thanks for the reply. I wonder if you could measure the dimension of the 521 muffler that is forward of the stand-off. On the hatori website I found the 521 but no dimensions given. They don't list the sab50 hp, which I've been told is for the North American market, so I'm trying to see if the 521 is the same size or what it compares to here in Canada.

Thanks,
Dave

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08-09-2007 02:45 PM  10 years agoPost 4
naked painter

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Mid glamorgan uk

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I think it's around 77mm.

If it's any help Midland Helicopters have a picture of the exhaust with the exact dimensions from pretty much every point. It's under the "exhausts/pipe" link under "Hatori 521", obviously.

http://www.modelhelicopters.co.uk/a...sts_Hatori.html

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08-09-2007 03:15 PM  10 years agoPost 5
DAVE62278

rrApprentice

Ridgetown, Ontario,​Canada

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naked painter,
Thanks, a very helpful link. The only difference is the SAB50 HP's measurement of the stand-off is 25mm compared to 17mm on the 521. Hopefully, this extra 8mm won't cause to much of a problem

Thank for all your on this,
Dave

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08-09-2007 03:27 PM  10 years agoPost 6
naked painter

rrVeteran

Mid glamorgan uk

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Hi Dave

The 17mm didn't cause a problem. I was reluctant to cut the canopy but it seems to hold up well with little or no vibration.

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08-09-2007 06:13 PM  10 years agoPost 7
Leif

rrElite Veteran

USA

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Thanks, a very helpful link. The only difference is the SAB50 HP's measurement of the stand-off is 25mm compared to 17mm on the 521.
That makes the SAB50 essentially a remarketed Hatori #522.

Leif

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08-09-2007 06:44 PM  10 years agoPost 8
racer944

rrApprentice

Greely, Ontario -​Canada

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Do these photos of my Evo help? I'm running this muffler on two of my Evo's. Some canopy trimming is needed, but it looks great and the canopy does not loose any strength.

The muffler is an excellent choice for this heli and the OS Hyper .50 by the way...

E

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08-09-2007 07:22 PM  10 years agoPost 9
DAVE62278

rrApprentice

Ridgetown, Ontario,​Canada

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racer944.
Thanks for the photos and comments on how this muffler works well with the OS50 Hyper. Also thanks to both racer944 and naked painter for the comments on how trimming that much from the canopy doesn't seem to cause any problems because that was the concern I had about this muffler.

Thanks, once again RR members are very helpful,
Dave

PS. racer944 Where did get the graphics for your canopy and where is Greely, Ontario

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08-10-2007 03:06 AM  10 years agoPost 10
racer944

rrApprentice

Greely, Ontario -​Canada

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Dave;

Glad to help...

Graphics were custom made by Callie Graphics. It started off as one of her basics designs with a few mods and some color changes. She does great work and I can highly recommend her services as I have 5 canopies done up by her.

As for Greely, its a small community just to the south of Ottawa...

Cheers;
Eric

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08-10-2007 03:15 AM  10 years agoPost 11
DS 8717

rrProfessor

Here wishing i was​somewhere else

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Thats not an SAB50,it's the 2 piece SB 50.It's only amuffler and runs OK,it is quiet but there are mufflers that produce more power. The Hatori 522 is a better choice,it is a one piece 3 chamber muffler unlike the SB 50 which is a 2 piece 2 chamber muffler. The SB 50 is $125,the 522 is $93 at helicopterworld.DOUG

YOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED

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08-10-2007 03:34 AM  10 years agoPost 12
racer944

rrApprentice

Greely, Ontario -​Canada

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The muffler is indeed a Hatori SB50 HP JK special... I assumed thats what Dave was asking about from his initial post as I didn't think there was an SAB50 HP JK special... I'm obviously wrong however as upon rereading his post he does ask about a one piece muffler and I assume its an updated newer version of mine.

Having said this, the only SAB 50 I could find online with a photo and description to look at was at ReadyHeli.com and they mention it has a threaded header just like mine, so I'm not sure what is meant by one piece versus two pieces as this muffler would appear to be the same mounting system as my SB50 HP JK. Perhaps description is wrong?

Sorry for any confusion I may have caused you Dave if indeed the SAB 50 is what you are after...

In any event, I stand by my recommendation that the SB 50 HP JK is an excellent all around muffler for the EVO/Hyper .50 combo. Good combination of power and sound attentuation, developed by Hatori and Jason Krause for the OS Hyper, and the "two piece" header mounting system works very well for me (I am using a "TMoore" bracket on one, and the stock clamp bracket on the other Evo.

Eric

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08-19-2007 01:54 AM  10 years agoPost 13
scbroder

rrNovice

MI

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What is the difference between the SB50 and the SAB50, other than the 2 vs 1 piece design? Is the SAB a tuned pipe like the MP5?

I like the one piece design but do not want a tuned pipe that makes the engine hard to tune. I actually prefer the look of the 521 because the sandoff is shorter, but plan to get the SB50 or SAB50.

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08-19-2007 04:11 PM  10 years agoPost 14
DAVE62278

rrApprentice

Ridgetown, Ontario,​Canada

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scbroder,
AS far as I can tell from the picture of the SAB50 HP (sent from HatoriUSA), and a picture of the SB50 I found on one of the US on-line heli stores, the body is the same and only the way it is installed differs. I have learned in researching this muffler that when hatori uses SAB in product's part number, this means it's a one piece muffler that simply bolts on like the 521, and SB in the part number means a 2 piece muffler,using O-rings and an additional bracket for installation. It's my opinion that hatori has decided on the 25mm stand-off so they only have to produce and stock only one version of the SAB50, if it sticks out farther on some helis, so be it.
I can't comment on the comparison of the performance of the SAB50 to the 521. I only asked HatoriUSA to recommend a one piece for my EVO 50/OS50 hyper using 30% CP.
This is the email for Rich at HatoriUSA, Hatoriusa@aol.com
He was very helpful and quick in responding to any question I had.

Hope this helps,
Dave

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