TIRED OF FLAME-OUTS!

TIRED OF FLAME-OUTS!
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TIRED OF FLAME-OUTS! - 7/5/2007 8:46:35 PM

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I was wondering what carb tricks people use to prevent flame-outs. I have tried everything...........heavy clutch springs, rich mixture, fast idle set, bigger heatsink. Never have really been able to eliminate flame-outs. If I richen to the point where engine runs good enough to not flame-out then it usually will stall when starting out before it gets warm enough to lean itself!

Any tips would be great!

RE: TIRED OF FLAME-OUTS! - 7/5/2007 9:45:11 PM

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Wow! Nobody has any special tricks to keep the engine running! I have been thinking about trying glow plugs with idle bars for heat retention.

(in reply to lsurber)

RE: TIRED OF FLAME-OUTS! - 7/5/2007 9:53:56 PM

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A fresh engine with a fresh plug and good tune doesn't flame out.

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RE: TIRED OF FLAME-OUTS! - 7/5/2007 10:08:31 PM

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LOL! That's a great reply! Have you been to any tracks where they actually run em HARD?

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RE: TIRED OF FLAME-OUTS! - 7/5/2007 10:15:02 PM

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I can run through 3 tanks of fuel without stalling when I'm just puttin around! That's not the problem........it's when your really getting on it to point where you lean excessive. Then you need to richen the mixture. The problem is.........when you richen the mixture you will be boggy on cold starts until the engine starts getting leaner.

< Message edited by lsurber -- 7/5/2007 10:16:22 PM >

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RE: TIRED OF FLAME-OUTS! - 7/6/2007 2:50:16 AM

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Why would you want to lean excessivly?? Sman was right. A correctly tuned engine wont flame out. I can race my buggy all day long with no flame outs.

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RE: TIRED OF FLAME-OUTS! - 7/6/2007 3:48:33 AM

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Read top to bottom at least 3-4 times and then print it out and take it with you when you go out with your car for reference until you get a handle on tuning. As the above posters said, theres no special "tricks" other than tuning an engine correctly.

http://lstforums.com/forums/viewtopic.php?t=6289

(in reply to GRANT ED)

RE: TIRED OF FLAME-OUTS! - 7/6/2007 3:54:47 AM

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quote:

ORIGINAL: lsurber

LOL! That's a great reply! Have you been to any tracks where they actually run em HARD?

Yes. There's always a reason for a flame-out.

1. Worn engine
2. Bad plug
3. Air leaks
4. Worn or seized clutch bearings
5. Bad tune or a tune you use trying to get that last 0.01% of performance

All I can do is make sure everything is fresh.

(in reply to lsurber)

RE: TIRED OF FLAME-OUTS! - 7/6/2007 4:16:26 AM

86revo

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i'm kinda a noob to rc's so whats a flame out???

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RE: TIRED OF FLAME-OUTS! - 7/6/2007 4:51:05 AM

hotbodiesboi123

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A flame out is when a fire shoots out from the exhaust... cause by

1. Worn engine
2. Bad plug
3. Air leaks
4. Worn or seized clutch bearings
5. Bad tune or a tune you use trying to get that last 0.01% of performan

thanks SmanMTB copy paste thanks :]

(in reply to 86revo)

RE: TIRED OF FLAME-OUTS! - 7/6/2007 4:56:22 AM

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LOL

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RE: TIRED OF FLAME-OUTS! - 7/6/2007 7:36:12 AM

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quote:

ORIGINAL: 86revo

i'm kinda a noob to rc's so whats a flame out???

To help a noob its actually when the engine stops, the flame inside going out. But I like the though of fire shooting out the exhaust.

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RE: TIRED OF FLAME-OUTS! - 7/6/2007 8:38:37 AM

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lool flame shooting thruexaust (i rofled)

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RE: TIRED OF FLAME-OUTS! - 7/6/2007 8:48:51 AM

hotbodiesboi123

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lol >.<

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RE: TIRED OF FLAME-OUTS! - 7/6/2007 3:35:06 PM

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A flame-out is cause by letting off the throttle and not enough retained heat in the plug to fire fuel on decceleration. It is common in 2 stroke nitro burners! In order to keep the flame when you let off the throttle you must have 2 things present, fuel and retained heat in the plug to fire the fuel.

Here's where it get's tricky! Since the above is true and you must have fuel to keep the glow ignited,,,,,,,,,,,, how do you stop without the engine dying? Well, once again, there are only 2 ways to achieve this! You must increase the amount of fuel delivered during decceleration enough to prevent flame-out OR Just don't stop! The latter being impossible!

So........now we know that we must increase the available fuel on decceleration in order to keep the plug fire lit! Once again, there are only 2 ways to increase the amount of fuel on decceleration in order to keep the eternal flame! The first being to RICHEN the mixture enough to prevent flame-out and the 2nd would be to REDUCE the off-throttle TIME.

Now, to the problem!!!!!! If you richen the mixture enough to to prevent flame-out in an engine tuned to OPTIMAL PERFORMANCE you will no longer be at OPTIMUM! This leads to the second way to increase available fuel........and the only way so far that I have found to prevent flame-outs while maintaining optimum performance.

If your on brake/off power duration is shortened you will effectively provide the engine with more fuel to keep the fire burnin!

So, there you have my tip to reduce flame-out.........!!!!!! Brake hard my friends!

(in reply to hotbodiesboi123)

RE: TIRED OF FLAME-OUTS! - 7/6/2007 4:53:18 PM

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The best way to stop flame outs is tune your engine properly. If your engine is stopping on deceleration then its too lean. If your tuning for "OPTIMAL PERFORMANCE" as you call it then you can expect your engine to have a short life. No racers tune their engine like this.

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RE: TIRED OF FLAME-OUTS! - 7/6/2007 5:09:22 PM

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You apparently did you not read my last full post?

< Message edited by lsurber -- 7/6/2007 5:10:54 PM >

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RE: TIRED OF FLAME-OUTS! - 7/6/2007 11:42:21 PM

gtsum

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