clone?

[novaracer]

How so?...4 cycle power plants are far more complex (and heavier) with double the moving parts.
How so? Show me the money.
Probably closer to 10,000 rpm.

so after all the videos on youtube you are willing to sit your nutts on top ot that? for 100 bucks you can have paece of mind. or even worse you are willing to put your kid on somthing that will not could kill him. and with a billet the motors become snappy i like it and i would never ever put my kids life in the hands of a chonda flywheel after mike clements said about them letting go.

 

[syko120]

thanks for the links bro

 

[devino246]

so after all the videos on youtube you are willing to sit your nutts on top ot that? for 100 bucks you can have paece of mind. or even worse you are willing to put your kid on somthing that will not could kill him. and with a billet the motors become snappy i like it and i would never ever put my kids life in the hands of a chonda flywheel after mike clements said about them letting go.

We've seen ONE piece of evidence of an exploding flywheel. Thats hardly enough to call the myth true.

 

[novaracer]

We've seen ONE piece of evidence of an exploding flywheel. Thats hardly enough to call the myth true.

i have seen 4 and if there is one it is no longer a myth safty first

 

[devino246]

i have seen 4 and if there is one it is no longer a myth safty first

Not if the cause was a tampered flywheel. 4 you say, lets see some links.

 

[novaracer]

thanks for the links bro

your welcome

 

[novaracer]

Not if the cause was a tampered flywheel. 4 you say, lets see some links.

search it on 4cycle and there is a vid on youtube from solo cali i am not going to look them up for ya but dont tell people its a myth and i never seen it happen. what if sombody gets hurt or killed its on your head. ask any kart engine builder most have had one let go on the dyno. and just because you havent seen it dosent mean its hasnt happened

 

[Doc Sprocket]

We have seen no hard-and-fast evidence of flywheel explosions documented even remotely decently. There is no existing evidence outlining pre-detonation condition, peak RPM, operating conditions, modifications, etc.

The truth- run fast enough, something WILL fail
The myth- your flywheel's going go off like an anti-personnel mine at 5000 RPM.

I would bet a paycheck that THE ONE minibike flywheel failure video we've all seen was suffering an underlying condition- most likely that the flywheel was previously damaged by some idiotstick beating it off the engine with a 48" crowbar, run out of balance due to missing fins, or the modifications were done in the wrong order, like high-flow intake and exhaust, stiffer valve springs, rejetting, etc allowing insane RPM.

Maybe it was just over-throttled with no load.

I saw a failure video (can't remember which engine). Was pinned with no load. Of course it's gonna break, you twit...

Long story short-

IF THINGS ARE DONE PROPERLY, odds are good everything will be fine. Just think about how many kart racers run de-governed clones. Many are still more or less stock inside. How many have died lately? Yesterday, someone was killed crossing the street.

 

[Bluethunder3320]

i have heard horror stories, but never seen it actually happen or a stock motor like that.


of course, yesterday, i had my hand under the tank bypassing the governor to go fast down the street.

if the flywheel went, i would be at least missing my right hand. but i do believe it is impossible to blow up a stock flywheel with stock internals, if the flywheel has been treated nice and not beaten on with a sledge hammer or cracked.

 

[novaracer]

i wasnt talking about stock engines yeah a stock engine will ne fine. but so as u start getting above stock valve springs then dont even try it. even most kart tracks are making you run a billet flywheel. with that said a stock aluminum honday fw it fine up to 10,000rpm. but they cost almost as much as a billet arc wheel.and i dont care what wheel you are running you should lapp it to the crankshaft! but if you say odds are never advise people it will be ok because you never seen it happen. i have had it happen in a car. a 84 vw rabbit a autox car. not pretty it let go just getting off the freeway. that was bad but i was young and i had a nice hole in the hood and rad and no bell.

 

[devino246]

i have had it happen in a car. a 84 vw rabbit a autox car. not pretty it let go just getting off the freeway. that was bad but i was young and i had a nice hole in the hood and rad and no bell.

A car and a kart are 2 totally different things. A car(assuming its a stick) has a 15 pound clutch pack bolted to the flywheel and is used as a friction surface for the clutch.

 

[novaracer]

mass+rpm= bang but hey keep thinking thats its ok its not my life or my kids and i am fine with it but get it on vid and post it on youtube lol i give up. but drop a valve and stop that piston at 7grand and see what happens

 

[devino246]

mass+rpm= bang but hey keep thinking thats its ok its not my life or my kids and i am fine with it but get it on vid and post it on youtube lol i give up. but drop a valve and stop that piston at 7grand and see what happens

WTF? mass+rpm only = bang if the object is out of balance. Were not talking 8,000 here, flywheels are purposely over engineered so that they dont just go bang. I dont care how many mods an engine has, if the news says "Man dies after go kart flywheel explodes" there goes the manufacturer's reputation. Have you nothing better to do than mutter on about myths on the internet?

 

[novaracer]

i spin mine 9grand+ no myths here

 

[Doc Sprocket]

Look folks, it's very simple. Very, VERY simple. If you're at all concerned about catastrophic engine failure, don't use an engine. The "What If" list is endless. Anything can happen under any circumstance.

 

[devino246]

i spin mine 9grand+

because you enjoy spending massive amounts of money to achieve the same results as a small bike engine.

 

[Russ2251]

I luv this thread...LOL...
I have yet to see any detrimental effects after more than doubling my stock rpm and increasing my HP by 23.5% (roughly).
I do not buy (figuratively OR literally) the billet bull**** and never will.
Billet flywheels are nothing more than a money making scheme. It is pure BS as far as anything we are involved with goes.
An improperly torqued flywheel will destroy itself...as will a rod, cylinder head, or anything else you can think of.
On 2 occasions was I able to destroy flywheels. Neither one of them were related (ultimately) to excessive rpm.

 

[Doc Sprocket]

Russ, you know I don't doubt you- (you DO know that, right?) But I am curious as to how you arrived at 23.5%. Not to be a smart alec- just that you know I'm starting a DuraForce project ant would love some comparison info.

 

[r_chez_08]

I love your physics novaracer...
How come you have the time to write a massive reply and not the time to post one of the "easy to find" pieces of evidence.

 

[karl]

HOW BOUT THIS

If you are that scared of blowing up the flywheel

1. Keep it governed
2. Take some steel plate and make a blast shield so If the fly wheel blows up (99.99999999999999999999%) chance it wont, It will block the shrapnel.


I got a 3hp briggs on my go-kart and its got an aluminium flywheel from a pushmower any I hold it out till the valves float all the time down the road. Never had a flywheel burst, never will.