need help with overheating .16

[parris001]

LMFAO! Finally a mod with a sense of humor. Well answer me this then. Why is it that my experience has been (and we're talking about very basic engines here, nothing fancy) more nitro=more heat? Is it the small heatsinks on the puny motors? Do you have any theory to go with this?

My understanding (and it may be flawed) is this: raw nitro is like diesel fuel. It's hard to get lit but when it does light it makes a powerful flame. The methanol in the fuel is what actually ignites first and it in turn ignites the nitro. The oil in the mix either burns somewhere between the point where the methanol ignites and the nitro ingites (undesirable), or it doesn't burn at all and just goes out the exhaust (this is just thoery I've heard tossed about over the years). Now, here's where I understand more nitro = more heat comes in. Let's say what I've stated above is true with a 15% nitro blend. Now we up it to 30%. The oil that was going out the exhaust unburned has been subjected to twice the brutal dose of nitro it was seeing in the 15% blend and it's actually beginning to burn inside the engine. Oil burns hot. Hotter than gasoline. Hotter than methanol. And (supposedly) hotter than nitro. And synthetic oil burns hotter than petroleum based oils.

This is what I base my more nitro = more heat theory on. That, and the assumption that anytime you create more power you create more heat. Tell me where this thinking might have gone wrong.........

 

[AC48]

To me what you have said makes sence, but I have seen first hand that my friend wanted more power out of his .15 FE so he put 30% in it and it ran at like 140 (no joke, 138 according to my Duratrax infrared temp guage). He had to lean it out a lot in order to get the temps up and it had a lot more power so I don't think its the small heatsink/puny motor theory.

 

[FastEddy]

-When higher percentages of nitro are used (assuming that the oil contents are identical), the needle must be richer than lower nitro content fuels. With a richer needle setting, more fuel is consumed which means more oil, methanol, and nitro is run through the engine. Methanol has a very dramatic cooling effect when run through our engines, nitro has a fairly good cooling effect and the additional oil does not hurt either.

Quote from a fuel manufacturer.
http://www.cooperfuels.com/

 

[husky24tn]

as for the comment on the puny head size...

now i think your looking for a combination of several things that cause overheating....

tuning, nito content,needle settings, shimmed head or not....its a complex puzzle you have here and i think to figure it out you should go back to all manufacturer settings and try ONE thing at a time till ya get the heat out of the engine

paris racing has a good article here
( http://www.nitrohouse.com/tip,_engine_breakin.htm )that helps in tuning....as for the nitro i would go 20-30% ....for the simple fact thats what most manufacturers suggest in the motors...

traxxas fuel isn't by far the best fuel out there and the gallon you have may be "bad" ...nitro can ruin........
me personally i would go back to ground zero...and start out with an all new approach...change one thing at a time and figure the problem out when that "one" change fixes my situation....

just my 2 cents worth....sometimes things just happen and there really isn't a logical explanation as to why...like my wife putting the remotes on top of the t.v. when she knows dam well ya can turn it off sitting on the couch....roflmao

peace

 

[parris001]

"Horsepower is how hard you hit the wall....... torque is how far you take it with ya...." is classic. I love it. How do get that stuff down there in your postings?

 

[FastEddy]

Interesting artical

Two and a half years ago, we decided to conduct a nationwide experiment to find out where the point of diminishing return actually is when it comes to engine life vs. oil content. Using our proprietary formula of high-grade castor and a proprietary synthetic oil blend, we mixed over two hundred gallons of 6%, 8% and 10% oil content fuels. We sent these fuels to off-road and on-road racers around the country and monitored their progress for a two-year period. These fuel samples were raced in every type of popular brand engine (.12's, .15's and .21's) at local events, regional and national-level races and even in two world championships.

The verdict? Everyone that tested the 6% and 8% oil content fuel noticed a significant performance improvement, especially in acceleration and in improved throttle response. The engines were easier to tune and came up to temperature more quickly and stayed at that operating temperature more consistently. Also, the engines remained crisp at idle and midrange, even after idling for extended periods (like waiting for the starting gun to go off), thereby reducing the chances of loading-up and flaming out.

Engine life? In testing over two hundred gallons over a two-year period, only one team member using 6% oil had a bearing failure. All other drivers reported total reliability with no abnormal wear or engine life issues. In addition, when the engines were disassembled, minimal carbon build-up was present and the internal parts were clean. The mated surfaces (i.e. the piston and sleeve, crank pin, rod bushings, etc.) were polished to a near-mirror finish.

Based on over two years of testing, we concluded that a formula using 6% castor and 2% of a proprietary synthetic oil for a total oil content of 8% was the ticket,
http://www.horizonhobby.com/Explore/Article.aspx?ArticleID=1385

 

[ZANDOR]

parris001 You just been :bowned: fucken big TIME LMFAO

I have said this before and ill say it right now
fiddlesticks with the best and go away like the rest

First off you can have as may hours as you like behind a wrench and still be wrong.
Your understanding of this subject is flawed. I will not try to educate you on this issue due to the fact your experience far out weighs any other member here on this forum. We should just listen to what you tell us and keep our mouth shut. Maybe, just maybe if at sometime during the last 20 years you have had your hands inside an engine you took some time to read and more importantly open your mind a bit to look and understand what others are trying to explain to you, you would get an even better understanding of a subject you believe you have mastered.

Its totally obvious that you are the master of anything you put your mind to and are more then willing to try and shove your mislead opinions down our pie holes. This forum has seen people like you come and go.

I will back off and consider myself schooled by the master.

You are right and everyone else is wrong.


NitroRC.com
Often engine temperatures are actually improved (lower) with higher nitro-methane contents because a richer setting can be achieved without adversely affecting throttle response. This is an important consideration when deciding on your blend of fuel.

 

[parris001]

Ah, I ain't worried about FastEddy. I think he's still pissed about the elections.

 

[FastEddy]

parris001,

We may have gotten off on the wrong foot.
After having to delete posts that you made craping on others threads, excessive use of smilies up to 8 in one post, and your blatantly flawed thought pattern in regards to this subject, I ASS-U-MEd you were a spamming 7 yo.

My Bad,

It appears to me that you are capable of forming sentences and thoughts without using pictures. (this is a good thing) It also appears that you have some spunk in your personality as well. In order to fit in here you will need to stop baiting. This is what we call making posts in order to illicit a response that will most likely be negative. I believe you have been warned about this once already by another mod.

If you intend to stay here and fit in I will suggest that you redirect your spunk to helping users with questions they have in areas that you are proficient in. If you need help by all means ask your questions. You will find that misinformation on this forum is put to rest ASAP. Subjective information is talked about and users post their opinion.

The users of this forum are a tight group. We welcome everyone into our home here but ask that they conduct themselves properly. Just as we have open arms, I have also seen the door slammed and locked on people who cause trouble.

You will need to make the decision to either come in our house, conduct yourself properly or move on to another community that better suits you.

-Ed

 

[AC48]

"Horsepower is how hard you hit the wall....... torque is how far you take it with ya...." is classic. I love it. How do get that stuff down there in your postings?

Go to your User CP and then go to "Edit Signature", then type in what you want it so say and click Save Settings.

 

[husky24tn]

can't we all just get a bong...i mean along...lol

 

[parris001]

LOL! Hey, my bad FastEddy. No hard feelings dude. I like to butt heads and seldom know when to back down. But this is a fun forum and I do enjoy it so I'll behave myself :thumbsup: so I don't get booted out the door. If I insulted you (and I intended to) I'm sorry . I don't proclaim to know it all by any means and until I'm proved wrong I won't surrender my stance. Once again, I'm sorry.

 

[ZANDOR]

can't we all just get a bong...i mean along...lol

 

[Maxx Trooper]

Megatech engines have always been known to overheat, i have experienced it first hand. what i did is changed the carbs. i put a OS #10 carb from a old OS.12 CV-X on the megatech, and i never had a overheating problem after that.

later

 

[parris001]

Why do you think the carb change cooled it off? What size Megatech did you put the .12 size carb on? Was the carb bigger or smaller than what came on it originally?

 

[Maxx Trooper]

Why do you think the carb change cooled it off? What size Megatech did you put the .12 size carb on? Was the carb bigger or smaller than what came on it originally?

The stock carb in the megatech .16 didnt hold a tune, so it leaned itself out causing it to overheat. with the OS carb installed, it held a tune, so it didnt lean itself out and didnt overheat. the carb was the same size, just dropped it right in.

later

 

[Rolex]

This thread is starting to remind me of one from a few months back, where one member insisted that the World Trade Center towers collapsed from the bottom. More people in the world had watched that event live than any other event in world history, and it was captured by every camera in New York City, but he insisted on his opinion.
You can be wrong as often as you'd like to be, just don't try to force your opinion on others that rely on facts.

 

[FastEddy]

Bout time you came around.
I thought I pissed you off and you decided to hang out at Traxxas with the rest of the hip gang. :

 

[Rolex]

Bout time you came around.
I thought I pissed you off and you decided to hang out at Traxxas with the rest of the hip gang. :

You're still #1 in my book. I've made a few cameo appearances here in the last couple of weeks. I've been laid out flat for a while.

"What's the problem?"
"A weak back."
"When did that start?"
"A week back."

Traxxas? Do they have a forum? How hip do you have to be, to be a moderator there?

 

[Maxx Trooper]

This thread is starting to remind me of one from a few months back, where one member insisted that the World Trade Center towers collapsed from the bottom. More people in the world had watched that event live than any other event in world history, and it was captured by every camera in New York City, but he insisted on his opinion.
You can be wrong as often as you'd like to be, just don't try to force your opinion on others that rely on facts.

are u saying that to me?

later