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Old 07-13-2010, 10:33 AM   #31
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ok yeah but arent you going to put a rb k10 on that rc8b you have
yeah once get enough money for a RB k10
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Old 07-13-2010, 12:41 PM   #32
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What is your thought on this one? Are the engine harder to tune with a ceramic bearing? If not using a ceramic, what do I use instead? Anyone??
My experience with ceramic front bearing (ceramic main bearing is okay) is that they leak when they are cold. There are several threads in here on this topic, and I can read that it is a common problem.

Sure, don't tune it while it is cold, but some of the SH engines (with ceramic front bearing - not standard) I am responsible for, even leak when warm. That makes it a bitch tuning!
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Old 07-13-2010, 12:49 PM   #33
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My experience with ceramic front bearing (ceramic main bearing is okay) is that they leak when they are cold. There are several threads in here on this topic, and I can read that it is a common problem.

Sure, don't tune it while it is cold, but some of the SH engines (with ceramic front bearing - not standard) I am responsible for, even leak when warm. That makes it a bitch tuning!
I use quality TKO double sealed ceramic front engine bearings. No problems here. I don't see how a bearing being ceramic would make it leak any easier than a steel bearing. The rubber seal(s) are what seals them up, and they have nothing to do with the bearing being ceramic or steel. I would say, maybe if you are using cheap ceramic bearings that have crappy seals, it would seem like the ceramic bearing leaks. But in actuality, it is just a poorly made bearing seal. If you use good ceramic bearings with good seals, there are ZERO issues.
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Old 07-13-2010, 01:05 PM   #34
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I have experienced problems with 4 engines now. 2 RB's (with RB ceramic bearing) and 2 SH's.

This thread contains some thoughts on it too.
Ceramic vrs Stock bearings???
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Old 07-13-2010, 01:25 PM   #35
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yeah once get enough money for a RB k10
once you do that that thing will be even faster but did you ever get that new wheel for your bumpbox?
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Old 07-13-2010, 01:43 PM   #36
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thanxs for all the replies. ill figure everything out little by little, i just gotta play with my motor and figure what my motor is telling me. its looking like the o.s is going to be a easier motor to tune. i also heard that the o.s has the best carburetor in the market, ive also heard that the seem to loose there compression faster than any motor.
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Old 07-13-2010, 01:54 PM   #37
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thanxs for all the replies. ill figure everything out little by little, i just gotta play with my motor and figure what my motor is telling me. its looking like the o.s is going to be a easier motor to tune. i also heard that the o.s has the best carburetor in the market, ive also heard that the seem to loose there compression faster than any motor.
Yeah, the compression isn't great, but they will still run great. That is just how OS engines are.
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Old 07-13-2010, 02:04 PM   #38
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+1
+1
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Old 07-13-2010, 02:08 PM   #39
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Neither is hard to tune. OS is no easier. I have both. understanding what it's telling you is the key.
OOPS I meant to quote this one.
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Old 07-13-2010, 03:17 PM   #40
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OOPS I meant to quote this one.
+1
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Old 07-13-2010, 03:18 PM   #41
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Neither is hard to tune. OS is no easier. I have both. understanding what it's telling you is the key.
+2
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Old 07-13-2010, 03:24 PM   #42
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OS engines.
+1000
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Old 07-13-2010, 07:57 PM   #43
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I am not a OS guy for R/C cars, but have tuned a few, and they are not finicky as some other brands out there, but then again there really is no engine to finicky for me to tune,"not tootin my horn" It is just that I have been tuning nitro engines since I was 8 yrs old, " grew up flying with my dad" I have tuned sport, some 4 cycle "different animal altogether" and racing, pylon engines for years. Case in point, if anybody knows K&B engines #4011 in particular was a pain to tune no matter what carb you used. I could make that joker scream! if you gave me a little time to learn "that " engine as they all ran a little different. I have tuned a few for guys that were racing for years and could not get the thing to run just right. It is kinda like a piano tuner, or tuning a guitar, it takes an "ear" for it. FORGET temps, take your time and let the adjustment settle in, listen to it, fell it, be patient, it will talk to you just listen. There is NO sweeter sound then a perfectly tuned nitro engine,"to me" my wife and neighbors do not feel the same! lol. Car engines take a little more patience as the load on the engine varies alot more, BUT the principal is the same. The sound should be a high pitch, smooth, consistent tone at all ranges of the rpm. Sorry this was so long. Happy motorin guys. The engines today are waaayyyy easier to tune then they were 25+ years ago.
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Old 07-13-2010, 08:06 PM   #44
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a few things to ask to get the learning of the engine out of the way if you are new to that engine. First ask the guys running them the heat range "plug" head shims, and pipe that engine likes for the type of running you do. Saves alot of time and money. Airplane race engines, we tune the pipe length to the engine we have and what prop we are using for that specific plane we are flying, ie pylon the prop is smaller dia. heavy pitch "rpm's baby!" pattern prop, big dia. less pitch, toke some playing to get it just right. But when it is on, IT"S sooo sweet!
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Old 07-13-2010, 08:11 PM   #45
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Originally Posted by Nilks View Post
I have experienced problems with 4 engines now. 2 RB's (with RB ceramic bearing) and 2 SH's.

This thread contains some thoughts on it too.
Ceramic vrs Stock bearings???
I run ceramics front and rear in all of my engines. Not one single little problem. I'm talking MANY engines. All TKO's with double seals. So I'm not sure about other crappier ceramic bearings, but the TKO's don't leak any more than a standard steel bearing does, in fact probably less.
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