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HomeAircraftHelicopterCentury Radikal G20-30 N640 Hawk Predator › Radical carb setting.
01-20-2010 06:22 AM  8 years agoPost 1
curtgra

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Corona, CA USA

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Does anyone know about where your carb setting end up being after breakin?

I've got a gallon thru mine now and have been turning in the low speed needle about a couple screw driver blade widths now a couple of times and am still getting a tail kick. My plug still looks dark brown if not slightly black, but dry looking. I run Koltz, 4oz/gal and have the Min air filter.

I started with Billme' setting of 1 1/4 L and 1 1/2H. I've got my headspeed around 1850 as I'm not trying stick bangin 3d. I'm here in SoCal and the temps have been about 50F in the morns and high 60's in the afternoons.

So I was just wondering where someones setting ended up being thats running around the same ambient temps I'm running in. I'm just paranoid that I'll burn my engine if I screw my needles in too far.

Thanks

Can I try yours.............No, get your own!

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01-20-2010 07:39 PM  8 years agoPost 2
Gearhead

rrMaster

Vt

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did you see the very Top Post here on the Century Page "Radikal 20 FYI", it may tell you there..

https://rc.runryder.com/t551272p1/

Jim
Buzz Buzz Buzz

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01-20-2010 07:50 PM  8 years agoPost 3
Zman

rrKey Veteran

Florida

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do you have a temp gauge? You shouldnt be real rich at those settings. What gear ratio and head speed? velocity stack or air filter?

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01-20-2010 09:11 PM  8 years agoPost 4
curtgra

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Corona, CA USA

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I'm running the 6.4 gr with a headspeed around 1850.

I also kept close tabs on the Radical FYI. Although kept getting more cornfused when mine wasn't "tuning" up like everyone elses. Then I though maybe my setting will be different since the FYI was run back east in the colder weather.

Can I try yours.............No, get your own!

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01-20-2010 09:22 PM  8 years agoPost 5
Zman

rrKey Veteran

Florida

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I would bump up your headspeed a bit and see if the kick doesn't go away. I am runing 1850 but on 6.9 ratio. If you are using just the venturi, then it is okay to tweak in the high needle some but I would keep low at 1.25. I think if you crank up your head speed a little you will find the motor likes fuel. Just keep eye on temps.

Z

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01-20-2010 10:08 PM  8 years agoPost 6
curtgra

rrNovice

Corona, CA USA

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Thanks.

I'll bump up my head speed to 1900/1950, reset my needles to starting position and try that out.

My engine rpm with my current settings is around 11840. I noticed with your 6.9gr and 1850 hs your rpms are 12765. Maybe I'm just lugging the motor too much??

New question. Would it be better to run this motor with the 6.9gr or would my current 6.4gr be ok if I just crank up the head speed some?

Can I try yours.............No, get your own!

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01-20-2010 10:26 PM  8 years agoPost 7
Zman

rrKey Veteran

Florida

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The 6.4 ratio will work fine. Before the new ratios came out, we were running 6.0 and 2000 head speed. If you are a 3d guy, eventually you will probably want to try the 6.9. Bill once taught with gassers, don't lean to make power, tune the heli first. So I would try a little more head speed and see if your tail kick doesn't go away

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01-21-2010 12:22 AM  8 years agoPost 8
curtgra

rrNovice

Corona, CA USA

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Thanks Zman & Wasp.

If I'm not rained out this weekend I'll try this again.

Can I try yours.............No, get your own!

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01-21-2010 03:11 AM  8 years agoPost 9
Billme

rrElite Veteran

MS

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Very good info...

Let me add that those recommendations in the FYI are to allow you to fly a little harder sooner..It doesn't mean the engine is broke in. The engine will take another few gallons to break in, specially if you started off with a synthetic to begin with..Nothing wrong with that either...

Good job guys

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