RunRyder RC
 6  Topic Subscribe
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1871 views
HelicopterKyosho Caliber/Quest Neo-Caliber series › Caliber - stock muffler sucks!!!
12-09-2004 12:32 AM  13 years agoPost 1
orlee008

rrVeteran

Miami, FL USA

My Posts: All  Forum  Topic

So, I was just flying at my house tweaking things up when im hovering about 10' in the air. All of a sudden I hear a different sound (pitch) comming from the heli. I bring it down and take a look but everything sounds normal when idling . So I take it up again only to have my stock muffler cone, restrictor plate and rubber gasket blow off from the rest of the muffler and it made a terrible annoying sound. At the same time my power level rose so much that i alsmost lost my heli because it rocketed up in the air to about 15' - 20'.

Does the stock muffler restrict my O.S 32 that much? Seemed like i had much more power with the cone off than with it on. It just makes that terrible sound.....

Should I remove the restrictor plate but put back the cone and rubber gasket?

What are you guys doing about this???

orlee

Flying in Miami, FL (Kendall Area)

PM  EMAIL  GALLERY  Attn:RR  Quote
12-09-2004 12:44 AM  13 years agoPost 2
Flyfalcons

rrVeteran

Bonney Lake, WA

My Posts: All  Forum  Topic

I pulled the restrictor plate out of mine. Makes a little more power and is a little louder.

_______________________

Ryan Winslow
X-Spec, EVO 50

PM  EMAIL  GALLERY  Attn:RR  Quote
12-09-2004 12:44 AM  13 years agoPost 3
dkshema

rrMaster

Cedar Rapids, IA

My Posts: All  Forum  Topic

Among other things, since you are running muffler pressure (and the engine and carb are designed to operate with a somewhat pressurized system), losing the rear of the muffler makes you go LEAN in a hurry. Lots of extra power, for a short time.

Put your muffler back together, and tighten the screws that hold it that way.

You can drill holes in the baffle to relieve some of the back pressure (one of mine has six, 5/32 inch holes drilled in the baffle). That made neither a big difference in power output, nor noise level, but still allowed me to use the exhaust to pressurize the tank.

If you want more power, then you're going to have to go with either a bigger motor (37/40) or a less restrictive muffler.

Dave

PM  EMAIL  GALLERY  Attn:RR  Quote
12-09-2004 12:58 AM  13 years agoPost 4
Dr.Ben

rrMaster

Richmond, VA, USA

My Posts: All  Forum  Topic

I used my stock C30 muffler for two years bone stock and never had a problem. I switched to a Hatori 666 on my 37 to allow that engine to breathe better; it makes a TON of power. Your muffler just loosened up. Put it back together, possibly with a little hi temp threadlocker on the retaining bolt. There is no inherent defect with that muffler.

Ben MInor

PM  EMAIL  GALLERY  Attn:RR  Quote
12-09-2004 05:26 AM  13 years agoPost 5
Wally

rrVeteran

San Diego, CA

My Posts: All  Forum  Topic

I like the stock muffler... Sooooooo quiet!

The Big Wally

PM  EMAIL  GALLERY  Attn:RR  Quote
12-09-2004 09:28 AM  13 years agoPost 6
SalsettiA

rrNovice

Develier - Switzerland

My Posts: All  Forum  Topic

Hello,

I've flown for more than one year without the baffle, as soon as I noticed that I got a little more power. Of course, I had to change a little my needle settings, but nothing serious. The engine works fine with 10% and 15% of nitro. I get a little more noise than before, but I prefer to take advantage of the extra power (even, if it's not the biggest deal).

If you're ready to spend some money (~200USD), move to another engine (like that above): Toki 40, TT39, OS37 (my choice), without mod, but you should also invest in a new muffler adequate for the new engine. You will get more power than a muffler without baffle for almost the same noise intensity.

Have fun



Alex S.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
12-09-2004 08:29 PM  13 years agoPost 7
orlee008

rrVeteran

Miami, FL USA

My Posts: All  Forum  Topic

i wasnt worried about the muffler comming appart. i put it back together 2 minutes after it happened. I was just surprised at the difference in power when it blew appart. I think i might remove the baffle and see what happens or leave it but drill it out a little more. I want to keep it as quiet as possible as i do most of my flying at home.

you figure i would have to rich it up a little more once i remove or drill the baffle?

Flying in Miami, FL (Kendall Area)

PM  EMAIL  GALLERY  Attn:RR  Quote
12-09-2004 09:55 PM  13 years agoPost 8
wurthless

rrElite Veteran

Redding Ca.

My Posts: All  Forum  Topic

I'd say anytime you mess with how air/gas gets thru the engine you will need to change the needle to compensate...

QUICK! ,,,can someone turn the gravity off for just a second,,,,

PM  EMAIL  GALLERY  Attn:RR  Quote
12-10-2004 08:26 PM  13 years agoPost 9
d-n-jensen

rrVeteran

Bellevue WA

My Posts: All  Forum  Topic

I drilled 8 1/4" holes in my baffle plate

PM  EMAIL  GALLERY  Attn:RR  Quote
12-10-2004 09:04 PM  13 years agoPost 10
orlee008

rrVeteran

Miami, FL USA

My Posts: All  Forum  Topic

how about removing the baffle completely and inserting a sponge or something similar to quiet down the mufler noise level but still provide more exhaust flow???

orlee

Flying in Miami, FL (Kendall Area)

PM  EMAIL  GALLERY  Attn:RR  Quote
12-10-2004 11:07 PM  13 years agoPost 11
WMac

rrVeteran

Skotlande

My Posts: All  Forum  Topic

I think with exhaust being as hot as it is the sponge would probably melt.

Will


Beep Beep! One Road Travel, with Dominic Byrne!

PM  EMAIL  Attn:RR  Quote
12-10-2004 11:46 PM  13 years agoPost 12
dkshema

rrMaster

Cedar Rapids, IA

My Posts: All  Forum  Topic

No, please. NO sponges in the exhaust system.

Synthetic ones will melt, natural ones will just soak up oil and become big, soggy messes. And among other things, they really aren't all that porous. It'll plug up the exhaust.

Dave

PM  EMAIL  GALLERY  Attn:RR  Quote
12-11-2004 12:53 AM  13 years agoPost 13
orlee008

rrVeteran

Miami, FL USA

My Posts: All  Forum  Topic

brillo pad? lol.... its just me thinking...

i'll remove the baffle and drill some holes in it and see how it goes...

thanks peeps,
orlee

Flying in Miami, FL (Kendall Area)

PM  EMAIL  GALLERY  Attn:RR  Quote
12-11-2004 01:13 AM  13 years agoPost 14
dkshema

rrMaster

Cedar Rapids, IA

My Posts: All  Forum  Topic

Well, I was thiking steel wool when I wrote the NO SPONGE response.

Drill holes in the baffle, put it back in,
Put it back in without the holes.
Buy a bigger, more expensive muffler.

Dave

PM  EMAIL  GALLERY  Attn:RR  Quote
01-29-2005 05:25 PM  12 years agoPost 15
madman22

rrApprentice

Alexandria Louisiana

My Posts: All  Forum  Topic

i am a technician by trade, specializing in 2- cycle performance. an engine is an air pump, metered and tested for a very specific amount of air and fuel, that fuel and oil mix is important to the 10th degree. the muffler acts as a dam to keep a small amount of oil and cooling fuel inside the engine(a very specific amount) uncorking the exhaust will allow the oil to escqape mor rapidly than before thus lessening the oils ability to lubricate and cool the engine. actally the ehaust flow increase will allow the engine to run cooler, but the lack of proper lube will cause the increase in temp. the loss of lube is further facilitated by the loss of pressurre in the fuel system. so if you dont mind the noise , have a pump of some sort, andf a way to deflect the castor residdue, an uncorked exhaust wont harm the engine, but a tuned pipe would still be much better.

PM  EMAIL  GALLERY  Attn:RR  Quote
01-29-2005 06:44 PM  12 years agoPost 16
elta68

rrApprentice

Zurich - Switzerland

My Posts: All  Forum  Topic

cheap:
http://waltercedric.com/Mambo/index...id=45&Itemid=35

a bit more expensive:
http://waltercedric.com/Mambo/index...id=31&Itemid=35

best regards, [url]http://www.waltercedric.com[/url] caliber 30 sections

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-29-2005 09:24 PM  12 years agoPost 17
orlee008

rrVeteran

Miami, FL USA

My Posts: All  Forum  Topic

ahh i had forgotten about this thread...

so i went ahead and drilled a few 1/4" holes in the baffel and got a little more power than before. it does make a little more noise but not enough to worry about. I also had to richen up the engine a bit but its been running fine since.

good cheap MOD . Thanks for the tip(s)

Orlee

Flying in Miami, FL (Kendall Area)

PM  EMAIL  GALLERY  Attn:RR  Quote
02-08-2005 01:59 PM  12 years agoPost 18
azrc_pilot

rrApprentice

Seria, Brunei

My Posts: All  Forum  Topic

I drilled twelve holes in the baffle; four 4 mm, four 3.5 mm & four 2 mm. I used 15% Morgan Cool Power Fuel.
Sounds great and more power.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
02-08-2005 02:49 PM  12 years agoPost 19
Daves

rrApprentice

Tallahassee, Florida

My Posts: All  Forum  Topic

Enough said about baffles, holes in baffles, optional mufflers, etc. No reason to repeat any of that.

However, don't get so caught up in the comments on the muffler that you miss the fact (noted by dkshema in previous post) that you motor went DEAD LEAN when the muffler separated.

Do NOT fly again until you change the glow plug. When the motor when lean it is 99.99% likely that you toasted a plug. Although your motor may run ok in hover, the first time you go into FFF and pull out of the throttle, it is highly likely that your engine will die. Maybe you will be in an attitude that will allow an auto -- maybe not.

Ask me how I know.

-- dave --

PM  EMAIL  GALLERY  Attn:RR  Quote
02-08-2005 04:33 PM  12 years agoPost 20
orlee008

rrVeteran

Miami, FL USA

My Posts: All  Forum  Topic

lol, yeah since that i've gone through two glow plugs.

Daves is right, after the separation & lean run I did notice the engine wasn't idling as it did before and when i changed the plug i noticed that the element was melted into a little ball. I pluged it into the hotshot and it still glowed but was dim.

orlee

Flying in Miami, FL (Kendall Area)

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1871 views
HelicopterKyosho Caliber/Quest Neo-Caliber series › Caliber - stock muffler sucks!!!
 Print TOPIC  Make Suggestion 

 6  Topic Subscribe

Wednesday, January 17 - 3:16 am - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online