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HelicopterMain Discussion › what muffler on the OS 70
09-06-2003 04:18 AM  14 years agoPost 1
oboyse

rrNovice

conejo valley, california USA

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what are all of you running on the
OS 70... is the one from heliproz, on the 60 V2 combo any good..( Mavrikk 0205 ) thanks in advance

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09-06-2003 04:23 AM  14 years agoPost 2
Tyler

rrElite Veteran

Chicagoland area

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I am running a Hatori SB-15 muffler with fantastic results on the OS 70. A local pilot has the Mavvarik 70 and the 90 muffler. Neither combo runs well, but it may simply be the tuning skills of the other pilot. Also, he is running 15% coolpower while I run 30% coolpower or wildcat. I think the higher nitro allows the engine to run richer and thus cooler.

Tyler

Enjoy things that money can buy IF you don't lose the things money can't buy.

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09-06-2003 04:28 AM  14 years agoPost 3
JP3DFLYR

rrApprentice

Chino Hills, CA

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A guy at my club got the ney sb70 hatori seems really powerful btw he had a mavrill and he likes the hatori a lot better

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09-06-2003 07:04 AM  14 years agoPost 4
RotoMoto

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Reno, NV

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I've run my os70 with the mav and now a hatori sb70. I think the hatori is a little louder, but definately makes more power than the mav.

Nothing is ever so bad that it can't get worse

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09-06-2003 12:45 PM  14 years agoPost 5
James Yeram

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Oceanside, CA

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CMP2

i love it there isn't anything in my book better than that pipe.

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09-06-2003 02:10 PM  14 years agoPost 6
Joe Ubaldo

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Grand Rapids, MI USA

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SB-70 is on mine. Nice power!

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09-06-2003 02:48 PM  14 years agoPost 7
Dazzler

rrElite Veteran

Ohio

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Marikk on mine, love it. Runs great, and after a crash where you ruin the muffler, isnt that depressing!!!

Daz...

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09-07-2003 09:18 PM  14 years agoPost 8
jackheli

rrProfessor

Vancouver - Canada

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I run my Predator w/ an OS 70 and a Century Torpedo Muffler. Cheap with no power issues.

http://www.heli-world.com/Merchant2...ct_Code=CN3056C

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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09-07-2003 11:37 PM  14 years agoPost 9
G.Man

rrProfessor

Bristol

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MP2

works great on OS70

Don't Email me as I wont reply - PM Only (spam countermeasures)

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09-08-2003 12:32 AM  14 years agoPost 10
Joe Ubaldo

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Grand Rapids, MI USA

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Galifrey,

I bought an MP II along with the SB-70 I'm currently running on my OS70. How hard was it to get the engine tuning correct with the MP II in place?

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09-08-2003 08:24 AM  14 years agoPost 11
G.Man

rrProfessor

Bristol

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Joe

the engine we had was in a freya which was uniflowed and it was a doddle to get setup

Don't Email me as I wont reply - PM Only (spam countermeasures)

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09-10-2003 12:00 PM  14 years agoPost 12
rcrebel

rrApprentice

Michigan

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I'm also looking for a good muffler for the OS 70. Would I be better off getting an SB-15 or the SB-70 Hatori?

Thanks...rcrebel

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09-10-2003 12:21 PM  14 years agoPost 13
Joe Ubaldo

rrVeteran

Grand Rapids, MI USA

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My OS70 / SB-70 combo running Wildcat 15%, 9 degrees of positive pitch and 6 degress of cyclic pitch doesn't seem to have a lot of punch (I haven't allowed the temp to exceed 200 degrees measured at the head with a Raytek). It bogs down during full power ascents and large cyclic moves.

I'm trying to avoid making the switch to 30% and wonder whether a pipe would help.

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HelicopterMain Discussion › what muffler on the OS 70
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