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-   -   1 1/8" High performance centrifugal clutch (http://www.diygokarts.com/vb/showthread.php?t=42413)

Juiced 11-18-2019 11:14 AM

1 1/8" High performance centrifugal clutch
 
Afternoon all.

I am looking for a 1 1/8" bore High performance centrifugal clutch for a electric
project. Custom is fine if sturdy enough. The motor is rated around 80HP :smiley_omg:

Crazy Ed

itsid 11-18-2019 11:29 AM

mounting a centrifugal clutch to an electric motor is
a terrible idea!
and most of all 100% pointless!

'sid

Juiced 11-18-2019 11:42 AM

Depends on the application.

I still want one.

Ed

Budget GoKart 11-18-2019 11:54 AM

the only logical reason for a clutch on an electric motor would be.... WHEELIES!

JTSpeedDemon 11-18-2019 12:53 PM

NonononoNONONONO! NO!
Electric motors generate MAXIMUM torque right off the bat! So no, a clutch will not make an electric kart wheelie.
And anyway, you'd lose at least 1800 RPM of power when you could be GOING! Plus the clutch will actually dampen acceleration due to the extra moving parts and the slip. Plus you have to maintain it.
On top of it, I don't know of ANY 1 1/8" bore clutches of torque converters.

80 HP!!!!???
I don't think you have a DC motor, much less a motor suitable for a kart.
"Depends on the application."???
Seriously? You want advice from us and won't tell us WHAT you are doing??
Come on, man. We need tons and tons of details, and most of all, PICS! :useless:
Sorry if this sounds harsh, but this thread is going nowhere but down without details.

Juiced 11-18-2019 01:32 PM

All I wanted was a manufacturer of clutches.... Photos will come after I try it out.

What? Never drag raced a cart before?

It is a 80 HP AC motor. :)

JTSpeedDemon 11-18-2019 01:45 PM

Well then, if it's AC, you have two choices.
1. - Have a ridiculously long extension cable trailing you
2. - Have a ton of batteries hooked up to an inverter, not very weight efficient.

I have done "self drag racing" with my Briggs flathead kart, but that is in no way similar to an electric motor.

Can we at least see some pics of the motor? I feel like it's a massive industrial motor, designed to spin at low RPM, or possibly on a low duty cycle.

As itsid said above, a clutch on an electric motor is quite pointless, not to mention extremely inefficient.

Let me put it this way: You pull up to the christmas trees with a directly driven electric kart, the lights tick down, and you launch. There is minimal moving parts, and the motor does not need to spool up. = Faster launch times.
But with a clutch, the motor has to spool up to reach engaging, so that means lost time, not to mention the small amount of slip in the clutch, which further kills the ET.
Electric motors produce maximum torque INSTANTLY, as soon as you touch the "gas pedal". That is equivalent to a hard clutch dump.
If I had money, I'd be willing to bet that a properly geared direct drive electric kart would outperform it's own clutched setup at the dragstrip.

However, I can't stop you from going down the rabbit hole, so here's a 1 1/8" bore Comet 94C Duster torque converter driver pulley.
https://6x6parts.com/4_cycle_engine_...1_8-_bore.html
$265!!!!!
And you still need a driven pulley and belt! Not to mention a way to mount it!

Randy H 11-18-2019 01:59 PM

For Pete's sake,
Is very likely the guy asking for a centrifugal clutch wants a centrifugal clutch.

Get in touch with Shannon Halbert. Link below. This guy actually knows about clutches. Here you get baffling with BS and kids that don't know they don't know. Not just this thread either, lol.

http://gofasthp.com/

Info@gofasthp.com

Tell em I sent ya.

Juiced 11-18-2019 02:27 PM

Thanks Randy and will do! !

Tpdingo 11-18-2019 02:37 PM

Quote:

Originally Posted by JTSpeedDemon (Post 537076)
Well then, if it's AC, you have two choices.
1. - Have a ridiculously long extension cable trailing you
2. - Have a ton of batteries hooked up to an inverter, not very weight efficient.

I have done "self drag racing" with my Briggs flathead kart, but that is in no way similar to an electric motor.

Can we at least see some pics of the motor? I feel like it's a massive industrial motor, designed to spin at low RPM, or possibly on a low duty cycle.

As itsid said above, a clutch on an electric motor is quite pointless, not to mention extremely inefficient.

Let me put it this way: You pull up to the christmas trees with a directly driven electric kart, the lights tick down, and you launch. There is minimal moving parts, and the motor does not need to spool up. = Faster launch times.
But with a clutch, the motor has to spool up to reach engaging, so that means lost time, not to mention the small amount of slip in the clutch, which further kills the ET.
Electric motors produce maximum torque INSTANTLY, as soon as you touch the "gas pedal". That is equivalent to a hard clutch dump.
If I had money, I'd be willing to bet that a properly geared direct drive electric kart would outperform it's own clutched setup at the dragstrip.

However, I can't stop you from going down the rabbit hole, so here's a 1 1/8" bore Comet 94C Duster torque converter driver pulley.
https://6x6parts.com/4_cycle_engine_...1_8-_bore.html
$265!!!!!
And you still need a driven pulley and belt! Not to mention a way to mount it!

AC motors work just fine. Specifically 3 phase motor inverters are fine efficiency wise, and controlling isn't too hard if you know what your doing. All modern electric cars use AC drive motors. If it's 80hp, it's likely an EV motor which would work fine for a Kart, if not ludicrous.

So no, you don't need a large extension cord. And more voltage doesn't equal more weight. Use more smaller batteries.

And not just that...it's 80hp. Likely that motor puts out something like 120ft-lb of torque. You can direct drive that motor if you could connect it easily to an axle.

slowJEEP 11-18-2019 02:42 PM

I put a 40 series clutch on a 1.5HP AC motor. Needed to get the 60HP motor up to speed before energizing. Phase converter so no load on the shaft.https://uploads.tapatalk-cdn.com/201...55b132c759.jpg

Jim in Florida

Juiced 11-18-2019 03:29 PM

Quote:

Originally Posted by Budget GoKart (Post 537061)
the only logical reason for a clutch on an electric motor would be.... WHEELIES!

Quote:

Originally Posted by Tpdingo (Post 537081)
AC motors work just fine. Specifically 3 phase motor inverters are fine efficiency wise, and controlling isn't too hard if you know what your doing. All modern electric cars use AC drive motors. If it's 80hp, it's likely an EV motor which would work fine for a Kart, if not ludicrous.

So no, you don't need a large extension cord. And more voltage doesn't equal more weight. Use more smaller batteries.

And not just that...it's 80hp. Likely that motor puts out something like 120ft-lb of torque. You can direct drive that motor if you could connect it easily to an axle.

You are correct.
We have it currently as a direct drive. We want to "hit it" quicker off the line so a bit of motor speed with an AC motor provides that function.

Ed
Racing for over 30 years...

JTSpeedDemon 11-18-2019 04:14 PM

........Or you could run a chain to a jackshaft that has a clutch on it...........

But of course, I don't know what I'm talking about right?, so don't do that, every idea that I pound out on the keyboard is absolute trash, right?
Mmmhmm, thought so. :rolleyes:

Juiced 11-18-2019 04:38 PM

Quote:

Originally Posted by JTSpeedDemon (Post 537093)
........Or you could run a chain to a jackshaft that has a clutch on it...........

But of course, I don't know what I'm talking about right?, so don't do that, every idea that I pound out on the keyboard is absolute trash, right?
Mmmhmm, thought so. :rolleyes:

Your intentions are honorable, but all I needed at his time was a clutch manufacturer.

My other EV... DC motor, no clutch (being DC) 117V.

https://earthtechling.com/wp-content...05-450x355.jpg

JTSpeedDemon 11-18-2019 04:48 PM

That's kind of the problem...
Practically no one makes 1 1/8" clutches, so it's down to hyper expensive torque converters, a snap-yer-neck electric clutch, or putting the clutch on a jackshaft.

Randy H 11-18-2019 05:01 PM

Quote:

Originally Posted by JTSpeedDemon (Post 537093)
........Or you could run a chain to a jackshaft that has a clutch on it...........

But of course, I don't know what I'm talking about right?, so don't do that, every idea that I pound out on the keyboard is absolute trash, right?
Mmmhmm, thought so. :rolleyes:

Get over yourself Boy Wonder.

I have experience with electric motors. MG sets, conveyors (like thousands of feet long) rock crushers, electric cranes,(drag line cranes). I have fond (horrific) memories of a converted diesel > electric, 300HP 3 phase 4000+ volt beast. Way before PLC control. Solenoids, ladder logic and DC motors.

The torque is instant. For example an overloaded conveyor may pull an overload if you let it cool off, the motor the starter, heaters. Things I'm going to guess you don't know anything about.

However speed is not instantaneous. A big azz squirrel cage induction motor may take seconds to get up to speed, especially under a load.

I actually support you. I would guess you have a triple digit IQ. Kudos.
Heck, it is a sort of free country. The internet is fair game for all. Doesn't change the fact that people that don't know should keep their juicy face shut.

Hellion 11-18-2019 05:23 PM

Man, this was fun to read--the part where JTSpeedy 'sperged out and lost his mind AGAIN.
Plus spilled out some misinformation, opinion and half-truths. Little bit of word salad and walls of text. :rolleyes:

JT, it's not your place to question the questioner, basically demanding that he tell you what his plans are.
He wants a large bore clutch. If you don't know where to find one, maybe you should pipe down, aye?

I think you need a chill pill. I'm kind of worried about your attitude as of late.



I love that quote. I think it goes like this, "If you can't dazzle them with brilliance, baffle them with bullsh##."
Boy Wonder? How about Boy Blunder. :)

JTSpeedDemon 11-18-2019 05:29 PM

I can't quite decide on whether to be ticked off or laugh my head off! I'll go with the latter.:roflol:
Either way though, we needed a tad more info than was originally provided. Without context of application, it's utterly baffling to most.

Hellion 11-18-2019 05:31 PM

Quote:

Originally Posted by itsid (Post 537057)
mounting a centrifugal clutch to an electric motor is a terrible idea!
and most of all 100% pointless!

'sid

Dang. I'll say it again; it's pretty bad when a moderator weighs in with a few subtle barbs or mudslingin', if you prefer. First reply, too. :surrender:

Randy H 11-18-2019 05:39 PM

Quote:

Originally Posted by Hellion (Post 537106)
Dang. I'll say it again; it's pretty bad when a moderator weighs in with a few subtle barbs or mudslingin', if you like. First reply too. :surrender:

Ha ha, never thought you and I would agree.

A sliver of knowledge and a title that says moderator, and you to can too can belittle others with impunity.


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