still though, would help to convince if real world results are posted.
i run Jett 2 strokes in small speed planes, and while i can say a KBL plug is not as good as the McCoy plug, i would need to back that up with facts.

to say a 12% increase, i think you should post some actual test results.....same prop, gas/mix, weather....etc.

Im working on posting up videos and full on pdf test readout.

Im even going as far to show the in flight test result by utilizing the Hitec Aurora 9 Telemetry System.

Wow, as the OP, I can't believe how this thread has got out of control. Dang it summerwind, mpascual simply stated is opinion as clearly stated in the first sentence of post #18 and you want some kind of research paper or something to support his claims. Come on man, give the guy a break. I though post #18 was very well prepared and quite clear .... especially considering there may be a language barrier in there too.

If a user states that he has noticed a performance difference between plugs, there may be some merit for others to try that plug. If results are good, bad or somewhere in undetermined range .... so what, you should only be out the cost of a plug and your personal knowledge level will be increased. As a modeler for over 45 years, I've grown use to using the info I'm given with a grain of salt. Sometimes peoples suggestions are worth exactly what they cost me which is exactly nothing .... other times info can we a real wealth of knowledge and I reap the rewards. Thats all part of the modeling experience.

As far as a plug being the cause for a crash ... sure it can happen but it shouldn't. Again as a experienced modeler, I test anything engine related at higher altitudes until I have a high confidence level with that engine. Deadsticks are rare but they shouldn't be a major problem for anyone that has the experience level to be flying our larger planes. If experience level is lacking .... maybe the user needs to go back to a trainer or simpler planes for awhile longer.

so i am not allowed to place my questions or opinions on a reply?
if you have a problem with me as you obviously made it a point too, just PM me.

there is no language barrier that i see.....there is just no factual results to base the opinion on......anyone can say "it's better because i say so"..........what part didn't you understand?

I don't believe that is what I said at all. And, no I don't have a problem with you. This is not a personal thing at all. Sorry if I left that impression.

Let me restate my case .... when a poster clearly states that his post is based on his own experience, the experience of others as being restated in the post or the post is simply an opinion .... that pretty much ends the discussion right there. Sure you can ask questions, dispute the expressed opinions, etc. but if the info was never expressed as proven facts you can ask all you want but I doubt there will be much additional info coming. At best all you might do is tick off the poster being questioned. Some interesting discussions might be created though.

I guess I've always felt that it is up to ME to prove to myself through whatever means necessary whether free info is factual or not.

>"Selection based on many things such as our own experience, what we read or learn from other sources, etc."<

i guess where you confused me is that statement from you in post 63.
i am learning everytime i read this board, and wanted to find out the facts from mpasqual as he made a claim in which i wanted to know from him based on his experience.

I guess we just have a different perspective on what we're looking for from these forums. Or perhaps we just approach things differently. I suspect I'd enjoy a good conversation with you if we ever met at a flying field.

Hey mod..... don't worry, we're keeping this very civil!

yes very civil.

you should know that a topic like this is going to stray.
questions will get asked, and answers need to be facts for people to believe them.

my intentions are really to protect DLE from those who aren't in the know. i have flying buddies who have never been on the net, and some that go on the net to find the easiest answer to their problem, but even with links posted to them for answers, they won't look at them because they are lazy.

what i would like to see is DLE include a warning if need be on what to expect from their plug if used in a certain type aircraft.
one fella at our field was told by the old timers who never go on the net to do some sort of breakin on his DL50 and kept having crappy results....he then went by the guidlines from someone on the net.
VVRC supplies the NGK CM6 to assure a positive experience for the DLE user.
Tower or Hobbico must not read the internet forums at all though as they sell the DLE CM6 as a replacement plug............you'd think if they were informed that they would only sell the NGK CM6 or the iridioum version right?

But if "answers need to be facts" and not just user opinions ..... that excludes or reduces the value of opinions. I guess I welcome all responses and I can sort them out as necessary.

As for as a company like Tower, as long as their bottom line looks good at the end of the year, I really doubt they care much what plug they sell for the DLE. The newer plugs currently being supplied seem to be an improvement so maybe they can get by.

What makes you think Tower cares whether you have success with your engine or not, in fact, if you send your DLE engine to Hobby Services with NGK spark plugs in it, it will be returned to you with the OEM plugs installed. They love to sell ARFs and the engine warranty does not cover your crashed plane if that were to happen, they'd be happy to send you a free OEM plug with your new ARF. Hey!!!...Super Saver Club.....Woo-Hoo!!

Everyone has a right to ask a question in regards to rc's.

It didn't bother me when you had asked about some sort of results or data to back up. Because im in the process of getting all my test results together my final test is just seeing if the results match up to what my telemetry says when i fly the plane. I can officially prove my test with some sort of results. I will say the Iridium plug shows a significant improvement over the basic NGK CM6.

I agree that you have to take some information you see on the internet and forums with a grain of salt. Its sometimes better to learn from trial and error. Jodi has done alot when it comes to DLE Engines so i would listen to what he has to say.

People make the mistake and judging their findings on a small test range. However when you see as many stock DLE spark plugs come back as Jodi has seen as well as many other companies including Razor Hobbies, the results are unanimous. The stock DLE plugs are crap not worth investigating. Throw them away if you receive one with the stock plugs, and buy either an NGK CM6 or an Iridium Spark Plug.

And in the most part don't beat your self up over this and that, this is a hobby and should be fun not something to argue over.

My experience comes servicing DL/DLE engines on my country.
About NGK spark plug, i have some pcs to replace ONLY when my customer-friends wants.
When needed to replace i ALWAYS mount a RCEXL CM6 or ICM6 . Almost a thousand stainless steel top RCEXL CM6 spark mounted (trouble free in ALL cases) , and recently (the ICM6 comes to the market before this summer) almost two hundred ICM6 (trouble free in ALL cases).

On CRRCpro engines (GP26R, GP50R, GF55I) with stock ignition, on the JBA15G engine , the J50G engine , and FG36, when the ICM6 is fitted, idle and transition is smoother, and i 'feel' engine runs 'better'. Much better spark than fitted on the factory. Also all my friends and 'customers' of repaired engines let me know the same 'feeling' about ICM6.
I've made a lot of test before posting here, i'm not a newbie , and also i have and i've read the specifications from manufacturer about quality controls before the ICM6 comes to the market. I'm impressed about RCEXL job with ICM6.

Regards
Regards

Jodi is right Tower could care less. They make there money off of how much they sell. If the spark plug runs half ass and could possily cause your plane to crash but still run they will sell it. Its the same as if you go to a store and buy a $30 dollar helicopter that aint worth **** f it works it works if it dont oh well. Not saying that all their stuff is crap just if you can sell an engine that the customer can easily replace the spark plug if they wanted. They really could care less.

You guys performing the iriduim performance testing.

Just a heads up, but in performing tests using the NGK brand of Iridium plugs it was discovered that engine temps could be elevated to dangerous levels using an iridium plug. The ignition itself was a hotter unit but even using a "baseline" ignition power output level there was quite a rise in engine temps. The plug heat range may need to be modified to use the iridium electrode so keep an eye on the CHT's.

Looking forward to those test results.

We ran into that issue. If you ritchen out your mixture it helps to also counter the elevated engine temp.

On the quality test made by the RCEXL factory, the ICM6 spark plug was tested on the above terms:

- Shell strength test
- Anti-tensile test
-Anti-shake test
- Airtight test @ 220ºC
- Pressure test
- Ground electrode bend test
- Special test (central electrode melting point over 2000º)
The results of the test are on my computer, but i don't have the agreement from the factory to publish.

Some final notes:
Iridium: the most corrosion-resistant metal, even at temperatures as high as 2000 °C
Have you seen corrosion on a stock or cheap chinese CM6 spark plug central electrode after a few hours running or before they fails ?
I've seen corrosion many times.

Regards

hahaha.....we know that too well eh Jody?

other than buying a Futaba Rx with a discount, i have pretty much decided not to buy from them anymore from the treatment i got on my DLE purchase.
they should not be allowed to sell DLE engines.........they will if anything, ruin the DLE reputation.

Yes in deed i agree but what makes DLE a great product not just the precision in manufacturing but the customer service and care that Companies like Valley View, Razor Hobbies, and Chief Aircraft and so much more provide and stand behind.

It take companies standing behind a product and finding the issues then righting them to create the golden product that everyone likes.

It takes time and people putting in the man hours to get to know the products of its ups and downs. And then in turn apply that information to help service the general public and buyers.

This is a lot of stuff that goes unseen that many people are not aware of that is needed to create a great product.

I wonder how much testing went into their regular CM-6 plug??

Some very useful information here in spite of the occasional mudslinging exacto hobby knife blade was a very useful tip thanks to TOM for that. So far my experience with DLE has been pretty good own a DLE 30 and a DLE 55 both have had the plug changed out to the NGK CM 6 plugs because of this thread even though both engines were running just fine in this case it is best to fix it before it's broke.

summerwind , Congratulations ! You have made 20+ postings, which proves, you have a lot of free time on your hands. Thanks for your.... Contributions ??? I hope that buying 2 DLE engines makes you a spark plug expert. Price has nothing to do with quality... Unfortunate that this truth is unlearned. Accept this.. The plug will not cause a crash. You can't even get in the air unless the plug works !! Let it sink in... Pilot error, low altitude, poor build techniques, low flying reign deer, and gale force winds, usually are the crash culprits. Oh yeah... and Test Props too !!! Be ever careful of those dang gammit Test Props !!! Very brave, of you, to have installed one. You'd have been better off with one of those factory DLE spark plugs in your bird. You don't really have any say in regards to what a manufacturer sends with their product,... unless you own the company. Sounds about right. As for plug longevity, a plug that does not last long, is not defective. It is highly unlikely that DLE will advise you that a part to their engine is guaranteed, a near future failure. That is financially unethical. The plug given is enough to test and get started. Distributors can't be held accountable for supplying people with goods they want. Companies with bad products close down. You don't have to appreciate the tester plug that came with the engine. Finance a good plug !!! There is no language barrier here,... just a lack of focus and clarity. In your plight to protect DLE from those who aren't in the know(post #105), How's it going ??? I look forward to hearing your Real World results from your efforts. Thanks for all that was contributed, in your behalf, on DLE spark plugs !!!!

Regarding the temps. I have to tune for power, fuel economy, and reliability so I was unable to go richer without negatively impacting power and economy. In my case I had to go to a colder plug and adjust advance timing at specific areas in the RPM band. Don't ask, I just have more lattitude in some areas, and more functional limitations in others, than a modeler does.

I don't see much in the way of corrosion with NGK CM-6 plugs but that may because they don't get the opportunity to sit for long periods of time. Then again, the fuel used is tightly controlled (no ethanol, 100 octane no lead racing fuel) and the oil mix is a constant. They get about 10-12 hours off and get airborne again. Under a glass I noted what appeared to be a pitting, or form of melting, with the iridiums I worked with. I'm curious as to what may be evident with the plugs you're working with.

What plugs were you experiencing the melting with. You should not have experienced that at all if you were using a full iridium spark plug.

None of the Iridium plugs are full Iridium, theyhave anIridium alloy coated center electrode. Pure Iridium has a melting point of &gt;4000* F

you're right........i'd be very interested to hear your wisdom on running gas engines.............you have been flying RC planes for what, almost 2 years now?