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HomeAircraftHelicopterCentury Radikal G20-30 N640 Hawk Predator › Century torpedo slim exhaust adjustments, what setup for Rad G20
05-11-2011 07:54 PM  7 years agoPost 1
RM3

rrElite Veteran

Killeen, Texas - USA

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Anybody Know what exhaust adjustment is best for the century torpedo slim muffler on the Radikal G20, (like the small washer and small or large output etc.)

Ram

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05-12-2011 01:59 AM  7 years agoPost 2
Gearhead

rrMaster

Vt

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I will have Mark move your post to the Century page

Jim
Buzz Buzz Buzz

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05-12-2011 12:35 PM  7 years agoPost 3
Zman

rrKey Veteran

Florida

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rm,

On a stock 20, I suggest you run with the threaded insert in, dont worry about the screw/washer. I have found this to be best combination. Nice thing about this muffler is it allows you to easily put in and remove this threaded insert so may want to try it both ways (either will work) and see which you prefer.

Z

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05-12-2011 12:48 PM  7 years agoPost 4
ldtauris

rrNovice

Utica N.Y.

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Anyone have an extra threaded insert. Mine backed out and cannot find it.

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05-12-2011 01:47 PM  7 years agoPost 5
ChrisK7

rrApprentice

Stanfield, Ore. 97875

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On my G-26 I ran a couple tanks of fuel with an APC 17/6 airplane prop on the bench to run in the engine before I put it in the G30 Radikal.
I did some tach readings with the stock exhaust can, the Torpedo muffler and with and with out the stock air filter.
My readings showed around 8880 rpm with the stock muffler and stock air filter and around 9450 with the Torpedo muffler and stock filter.

It didn't seem to make much difference if I had the baffles or insert in the muffler. It also didn't seem to effect it if the stock air filter was on or off.

It may have spun up a little quicker with the insert in the muffler which would make sense cause of a little more back pressure but the overall top end didn't seem to change with or without the insert/baffle.

I have since installed a velocity stack air filter from Dave's Motors on the heli and it seems to pull better in the air with it but I haven't done the airplane prop test on the bench with it yet.

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