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Scorpion Power ProModeler
HelicopterMain Discussion › I'M BACK! AFTER a 2 year break and I still LOVE HELIS!
07-04-2017 02:11 PM  18 days agoPost 61
wc_wickedclown

rrProfessor

long beach calif

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found a gal for 20 bucks.

16
bucks for new plugs artf

Insha Allah made in america

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07-04-2017 03:25 PM  18 days agoPost 62
EEngineer

Elite Veteran

TX

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"found a gal for 20 bucks."

What a deal....but not near enough.

So much for S&W

I'll stick with powermaster....

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07-04-2017 03:52 PM  18 days agoPost 63
wc_wickedclown

rrProfessor

long beach calif

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RC HELICOPTER FUEL 30% R/C Nitro COOL POWER HI

Insha Allah made in america

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07-04-2017 04:15 PM  18 days agoPost 64
EEngineer

Elite Veteran

TX

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What's "cool power HI"?

Used to use cool power....when they had the green dye....

The dye ends up coating the inside of the crankcase...turning it green....

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07-05-2017 02:19 AM  17 days agoPost 65
JuanRodriguez

Elite Veteran

The Villages, Florida

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You'll never get a straight answer that makes sense ..... at least not as of yet ....

Been there, done that and old enough to know better.....

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07-05-2017 05:06 AM  17 days agoPost 66
wc_wickedclown

rrProfessor

long beach calif

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what plug should I use hot or cold I ordered 2 cold plugs.

and I'm looking for a used Castle bec these hv servos are just eating my 2s lipo up

Insha Allah made in america

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07-05-2017 05:09 AM  17 days agoPost 67
wc_wickedclown

rrProfessor

long beach calif

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♦EEngineer
What's "cool power HI"?
HI PERFORMANCE BLEND

Insha Allah made in america

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07-05-2017 05:36 AM  17 days agoPost 68
EEngineer

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TX

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What brand of plug?

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07-05-2017 05:53 AM  17 days agoPost 69
wc_wickedclown

rrProfessor

long beach calif

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Novarossi Turbo Glow Plug #7 Cold
http://www.ebay.com/itm/Novarossi-T...872.m2749.l2648

Insha Allah made in america

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07-05-2017 06:41 AM  17 days agoPost 70
EEngineer

Elite Veteran

TX

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Wrong type of plug...

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07-05-2017 07:02 AM  17 days agoPost 71
EEngineer

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TX

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Why are you putting an RC car glow plug in your heli engine?

Just curious...

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07-05-2017 11:37 AM  17 days agoPost 72
wc_wickedclown

rrProfessor

long beach calif

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omg lol ty
i need a cold plug but cannot find can you help me with a url ?

Insha Allah made in america

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07-05-2017 12:20 PM  17 days agoPost 73
allns47

Key Veteran

Richmond IN.

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McCoy #9

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07-05-2017 02:23 PM  17 days agoPost 74
wc_wickedclown

rrProfessor

long beach calif

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ty

Insha Allah made in america

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07-05-2017 03:39 PM  17 days agoPost 75
EEngineer

Elite Veteran

TX

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You might try a novarossi plug first.

Check the engine's manual.

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07-05-2017 03:39 PM  17 days agoPost 76
EEngineer

Elite Veteran

TX

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The manual also has the head shimming info, too.

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07-06-2017 04:57 PM  16 days agoPost 77
wifeorheli

Elite Veteran

reno, nevada usa

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I found the Rossi hot plug and the o.s. 8 give good performance. BUT obviously my altitude and tempture play a role compared to anyone else's tune. Best to get a hot medium and cold plug try them out. Factory reccomends a cold plug for 30% but found that untrue for my setup... but the Rossi plugs are short body. As EE said head shims play a major role with this motor. I went back to factory shims and now my tuning is a pain. One click either way changes temp 20+ degrees as with a extra shim I was getting 3 clicks for same result... this motor is truly a power house! Just got my new HV Servos Installed and a step down for throttle in mail to me! Found out my governer needs to be stepped down and the makers of my pushglow are uncertain if it can take the straight 2s told me to try it and cross my fingers HAHA

Novarossi Motors U.S.A
www.PlanetHobby.com
Team Align
GrandRc.com

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07-06-2017 05:00 PM  16 days agoPost 78
EEngineer

Elite Veteran

TX

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Try 20% nitro....

Also, have you "ported" your header to match the engine's exhaust port?

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07-07-2017 12:42 PM  15 days agoPost 79
wifeorheli

Elite Veteran

reno, nevada usa

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I'm running the matching Rossi Rex-H5s Tuned pipe. Ive tried a few other pipes and this pipe takes advantage of the full percormance across the whole throttle range... Interested to hear my EE about your above comment. Meaning what do you mean? Lol

Novarossi Motors U.S.A
www.PlanetHobby.com
Team Align
GrandRc.com

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07-07-2017 03:47 PM  15 days agoPost 80
EEngineer

Elite Veteran

TX

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I was hoping to have got your attention on porting your header...

The main thing that makes a tuned pipe work, and only on a 2-cycle engine, is the length of the baffle in the pipe from the engine's exhaust port that "reflects" the acoustic "shock" wave that occurs when the engine's piston "opens" after combustion.

This wave travels out the engine's exhaust port....down the pipe...until it hits the baffle(this baffle has a hole in it, btw).

Most of this is "exhausted" thru the baffle and out the pipe, but a small portion is reflected back towards the exhaust port.

Depending upon the engine's RPM, the length of this baffle can be "tuned" so that this reflection arrives at the engine's exhaust port just before the piston closes for another combustion cycle.

The result is that the engine's combustion chamber is "supercharged" by the added pressure of this reflected shock wave......and the engine's performance is increased slightly.

This technique is even used on "dirt bike" 2-cycle engines.

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Scorpion Power ProModeler
HelicopterMain Discussion › I'M BACK! AFTER a 2 year break and I still LOVE HELIS!
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