Plugs of Choice for Speed Engines
04-11-2010, 09:47 PM
#29
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RE: Plugs of Choice for Speed Engines
ORIGINAL: daven
If you are blowing plugs, you are either running lean or your head is TOO low.
If you are blowing plugs, you are either running lean or your head is TOO low.
Definately not lean, lots of smoke, and its a .46 fx I've been using for a couple of yrs, well broken in, never had to touch the head clearance.
04-12-2010, 07:35 AM
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04-12-2010, 09:18 AM
#32
RE: Plugs of Choice for Speed Engines
Also the rattling or buzzing of a loose crank, worn rod, contribute to early element fratures.
Grab the prop and try to rock it in the crankcase. Rotate it to a different position and check for axial slop or rough feel.
If it's a steel caged bearing, they're garbage and should be replaced with a high speed bearing .
Grab the prop and try to rock it in the crankcase. Rotate it to a different position and check for axial slop or rough feel.
If it's a steel caged bearing, they're garbage and should be replaced with a high speed bearing .
04-12-2010, 11:26 AM
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RE: Plugs of Choice for Speed Engines
The engine dripped out a bunch of black goo when I removed it from the plane, probably had enough abuse couldn't take it anymore, so I mounted my other very lightly used not broken in yet, .46FX for some abuse.
Off I go to the flying field again, for some more fun.
Off I go to the flying field again, for some more fun.
12-06-2010, 10:15 AM
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RE: Plugs of Choice for Speed Engines
ORIGINAL: Amir Assal
for a Evolution .60/Jett muffler
Which O.S plug you guys Will recommend to use: OS #8 OR OS F ?
for a Evolution .60/Jett muffler
Which O.S plug you guys Will recommend to use: OS #8 OR OS F ?
12-06-2010, 12:04 PM
#38
RE: Plugs of Choice for Speed Engines
Are you talking about the R5?
That's a cold plug...if you burn up the #8's or they don't work well, then yes, I would try the R5 just for the heck of it, to see if the engine likes it.
You'd probably need to re-adjust both needles...
The Evolution engines seem to like a warmer plug though...so the 8 should be ok.
That's a cold plug...if you burn up the #8's or they don't work well, then yes, I would try the R5 just for the heck of it, to see if the engine likes it.
You'd probably need to re-adjust both needles...
The Evolution engines seem to like a warmer plug though...so the 8 should be ok.
12-06-2010, 12:47 PM
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RE: Plugs of Choice for Speed Engines
After trying all the plugs mentioned on this thread, I settled for the OS F plugs. never a problem, my Jett engines loves this plug.
Doug.
Doug.
12-06-2010, 01:42 PM
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RE: Plugs of Choice for Speed Engines
no sense to spend extra money on anything other than a KB HP, 1L or McCoy #9.
All work perfectly fine and are reliable in the sport racing motors.
All work perfectly fine and are reliable in the sport racing motors.
12-06-2010, 04:50 PM
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RE: Plugs of Choice for Speed Engines
ORIGINAL: daven
no sense to spend extra money on anything other than a KB HP, 1L or McCoy #9.
All work perfectly fine and are reliable in the sport racing motors.
no sense to spend extra money on anything other than a KB HP, 1L or McCoy #9.
All work perfectly fine and are reliable in the sport racing motors.
K+B's have served me very well since I started using them in both my JETT engines and all my other ones also, and you can't beat the price! OS "F" plugs work good too but are a little steep.
