how much % nitro?

[Justamattd]

I've been running 20% odonels with an MC59 plug for months.. all other plugs have gone quick but this mc59 .. i have an mc8 and mc9 but havent burned out the mc59 yet, if i went to 30% nitro should i switch to the mc8 or 9 ? will this result in anymore noticable power from a stock .12ntc3 does any of this change air filter needs? i use a paper/foam outer seems sufficient

 

[Zdragon71]

With 30% fuel you need to burn a colder plug than the mc59 hot. Yes you should notice a difference in start up and response with 30% fuel. As far as a filter goes i always run two stage foam filters. Your gonna have to tune the engine to run richer with 30% fuel as well. Because you will be running richer you should notice a bit cooler temps also. The best mix should be around 30% nitro with a 10-11% oil mix. To mee the less oil the easier to tune and better running temps and performance.

 

[Justamattd]

So I got some odonels 30% today... Switched from the mc-59 to the mc-9 .. Ran well but plug burned out in half a tank... I switched back to the 59... Started right up.. That particular plug I have run for a gallon of 20% we'll see how long it last on 30%tomorrow... I have a mc-8 but I've ran several medium plugs of different kind with 20% and none have lasted more than one tank... Associated recommends the mc59 for the ntc3 I asked um myself... Though I didn't mention nitro%. What do you think.? (Anyone) am I doing something wrong? The mc9 cold 59 hot 8 low-mid... It just dont make sense to me why these cold plugs burn out so fast.. I've run them rich.. Run um lean it just dont seem to matter...

 

[Zdragon71]

Well in your case i would run what you have the best luck with. As long as your keeping good temps and getting good engine performance stick with the mc-59 hot and 30%. That is the plug I've had the best luck with myself even when i was still running 30% fuels.

 

[Justamattd]

Hey Z I ran a few tanks of odonnels 30% and some I mixed 1/2,20% 1/2 30% on that same old mc59 .. It just keeps on trucking... I was reading about the odonnels (that their speed blend and race blend both have 8% oil... Race is synthetic and the speed blend is a synthetic/oil blend still at 8%. You mentioned using about an 11% oil blend... I've read many fuels have too much oil... Though I'm not experienced with it really.. Should I be adding additional oil or is the 8% synthetic ok? It burns a lot cleaner than the older stuff (even older odonnels) and easier to tune easy I seem to be getting much easier starts on the 30% but I also added a longer pressure line which seems to help also..

 

[Zdragon71]

No dont add oil. 8% is plenty and as long as you tune it good enough you should still be getting a nice smoke trail even with lessor oil content. Heavy oil content fuels are good for breakin and bashing but it also is harder to tune to. I love the speed blend with 8% and also loved the sidewinder 30% with 10% oils. Also like i stated before i really prefer mccoy mc59 hot plugs and have had excellent luck with runtime and life out of them vs any other brand of plug I've ran.