Re: PW65 Malossi with WWB ceramic bearings

mat hormell /
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I appreciate the info and the interest! I dkt expect a major gain in power from the bearings being in the motor. The major increase in power comes from the final drive and the wheels. That's where they really shine. I plan to play with different exhaust configurations and what not but that will all be later once ita all together and being tested. I have a dyno so I can make minor changes to the pipe and see what it's doing to the power band. Here is the dyno run from his current yt60 kit, made about 4.25 hp on pump gas. I have it set up right now where it comes on the pipe as soon as it engages and run out around 8000 rpms

The springs dont engage the clutch til about 3500- 4k. It's like a rocket off the line with him on it already lol.

> Mikey Antonakakis Wrote:

> -------------------------------------------------------

> Cool stuff! A couple thoughts, if you want 'em - depending on exactly

> how you want the engine to make power, a stuffed case may not be needed,

> and may be detrimental for power band (I think the guys that developed

> the Aprilia RSA125 ended up running pretty large crankcase volume

> because it made wider power?). And compression ratio/compression

> readings don't matter a ton when you're going for top power, because the

> pipe can stuff plenty of air in for it not to matter a ton.

>

> My 50cc Peugeot has a pretty low compression ratio and large crankcase

> volume, and makes zero power below 8000rpm, but it makes a ton of power

> from 9k to 13k (13hp or so if I had to guess? Does over 65mph and

> accelerates quite well, pulls 5% grades at over 50mph. Gotta get it on a

> Dyno someday). I have the luxury of a well-tuned clutch and variator, so

> I can get away with a narrow powerband with low compression and

> hard-hitting pipe. That low compression is a bit easier on the motor

> too, I run very very low head temps even when ripping at top speed and

> climbing long hills. I almost don't trust my gauge because even after

> climbing up a 500' hill at 10% grade doing 30+mph, it says I usually hit

> about 140F. But I can easily keep my hand on the radiator, so who knows?

>

> Things obviously change for single-speed applications, but you need tons

> of power for drag racing regardless, and with a centrifugal clutch, your

> launch phase (while clutch is slipping) is determined by the torque you

> make at the clutch slip speed. F=m*a, P=F*v, so at any particular speed,

> more power (to the wheel) gives more acceleration - which sounds

> obvious, but it means if you can downgear to let the engine rev higher

> and get into the powerband (especially after the clutch slip phase), you

> will often have more power available to you (even if there's less

> torque!). For instance, if you shift the powerband up a good amount to

> make more power, and sacrifice some torque to do so (let's say 10% less

> torque, but 20% more power), you can change the gearing by maybe 20% as

> a result. So the net impact is better performance all around, even when

> the clutch is slipping (roughly 10% better acceleration even with less

> torque).

>

> My real 2 cents, it you're taking this much time and effort with this,

> it would be well worth it to get some good simulation software like

> EngMod2T. Costs less than your bearings, and has the chance to make a

> much bigger impact! 50% improvement on 99% efficient bearings only gets

> you to 99.5% efficiency, so a 0.5% overall improvement (even if you have

> a noticeable improvement in revvability). You can easily find several

> percent with better porting and pipe than what you get off the shelf.

>

> Anyway, I'm looking forward to seeing more of this project! Good luck!

20190204_125546.jpg
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Subject Written By Posted
  PW65 Malossi with WWB ceramic bearingsTopic by: mat hormell mat hormell 08/14/19 05:59PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: P D P D 08/14/19 06:11PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/14/19 06:16PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: πΏπ‘–π‘˜π‘Ž-πΏπ‘œπ‘‘π‘Žπ‘ π‘Žπ‘’π‘Ÿ π‘€π‘’π‘”π‘Žπ‘π‘’π‘  πŸ¦– πΏπ‘–π‘˜π‘Ž-πΏπ‘œπ‘‘π‘Žπ‘ π‘Žπ‘’π‘Ÿ π‘€π‘’π‘”π‘Žπ‘π‘’π‘  πŸ¦– 08/14/19 06:17PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/14/19 06:19PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/14/19 06:18PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Jack Rutherford Jack Rutherford 08/15/19 09:24AM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/15/19 10:41PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Dave & Bummerzz Dave & Bummerzz 08/15/19 10:03AM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/15/19 10:46PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/16/19 09:17PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Dave & Bummerzz Dave & Bummerzz 08/16/19 10:08PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: alex . alex . 08/15/19 07:49PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/15/19 10:48PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Graham Motzing Graham Motzing 08/16/19 01:23AM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/16/19 12:44PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/16/19 12:54PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/16/19 12:59PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Graham Motzing Graham Motzing 08/16/19 03:23PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/16/19 07:57PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Graham Motzing Graham Motzing 08/16/19 03:41PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/16/19 05:22PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/16/19 07:22PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: πΏπ‘–π‘˜π‘Ž-πΏπ‘œπ‘‘π‘Žπ‘ π‘Žπ‘’π‘Ÿ π‘€π‘’π‘”π‘Žπ‘π‘’π‘  πŸ¦– πΏπ‘–π‘˜π‘Ž-πΏπ‘œπ‘‘π‘Žπ‘ π‘Žπ‘’π‘Ÿ π‘€π‘’π‘”π‘Žπ‘π‘’π‘  πŸ¦– 08/16/19 06:26PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/16/19 09:00PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/16/19 09:12PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Mikey Antonakakis Mikey Antonakakis 08/17/19 12:15PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/17/19 07:38PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Mikey Antonakakis Mikey Antonakakis 08/18/19 01:08AM
  Re: PW65 Malossi with WWB ceramic bearingsRe: live ɘvil live ɘvil 08/21/19 09:42AM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/21/19 03:32PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: ♣Slew Foot♣ ♣Slew Foot♣ 08/21/19 08:13AM
  Re: PW65 Malossi with WWB ceramic bearingsRe: ♣Slew Foot♣ ♣Slew Foot♣ 08/21/19 08:17AM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/21/19 04:01PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/21/19 04:10PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: live ɘvil live ɘvil 08/21/19 04:38PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/21/19 04:55PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: live ɘvil live ɘvil 08/21/19 06:37PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/21/19 06:57PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: live ɘvil live ɘvil 08/21/19 07:39PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/22/19 02:15PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/22/19 02:20PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/22/19 02:17PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/22/19 03:10PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Graham Motzing Graham Motzing 08/22/19 05:34PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/22/19 05:58PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Dave & Bummerzz Dave & Bummerzz 08/23/19 09:25AM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Graham Motzing Graham Motzing 08/23/19 10:47AM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/23/19 11:16AM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Graham Motzing Graham Motzing 08/23/19 12:03PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Mikey Antonakakis Mikey Antonakakis 08/23/19 02:11PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/23/19 02:57PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Mikey Antonakakis Mikey Antonakakis 08/23/19 11:56AM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/23/19 12:16PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Graham Motzing Graham Motzing 08/23/19 12:30PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/23/19 01:40PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/23/19 12:22PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/23/19 12:49PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Graham Motzing Graham Motzing 08/23/19 03:12PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Mikey Antonakakis Mikey Antonakakis 08/23/19 03:15PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/23/19 03:09PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Graham Motzing Graham Motzing 08/23/19 03:14PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/23/19 04:42PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Daniel '' Daniel '' 08/23/19 08:32PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/23/19 08:36PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Daniel '' Daniel '' 08/23/19 09:12PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/23/19 09:15PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Daniel '' Daniel '' 08/23/19 09:40PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/25/19 12:38PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Daniel '' Daniel '' 08/25/19 02:44PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/25/19 06:55PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/23/19 03:20PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Graham Motzing Graham Motzing 08/23/19 03:22PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/23/19 06:59PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Graham Motzing Graham Motzing 08/26/19 12:52PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: πΏπ‘–π‘˜π‘Ž-πΏπ‘œπ‘‘π‘Žπ‘ π‘Žπ‘’π‘Ÿ π‘€π‘’π‘”π‘Žπ‘π‘’π‘  πŸ¦– πΏπ‘–π‘˜π‘Ž-πΏπ‘œπ‘‘π‘Žπ‘ π‘Žπ‘’π‘Ÿ π‘€π‘’π‘”π‘Žπ‘π‘’π‘  πŸ¦– 08/26/19 02:39PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: πΏπ‘–π‘˜π‘Ž-πΏπ‘œπ‘‘π‘Žπ‘ π‘Žπ‘’π‘Ÿ π‘€π‘’π‘”π‘Žπ‘π‘’π‘  πŸ¦– πΏπ‘–π‘˜π‘Ž-πΏπ‘œπ‘‘π‘Žπ‘ π‘Žπ‘’π‘Ÿ π‘€π‘’π‘”π‘Žπ‘π‘’π‘  πŸ¦– 08/26/19 02:44PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: πΏπ‘–π‘˜π‘Ž-πΏπ‘œπ‘‘π‘Žπ‘ π‘Žπ‘’π‘Ÿ π‘€π‘’π‘”π‘Žπ‘π‘’π‘  πŸ¦– πΏπ‘–π‘˜π‘Ž-πΏπ‘œπ‘‘π‘Žπ‘ π‘Žπ‘’π‘Ÿ π‘€π‘’π‘”π‘Žπ‘π‘’π‘  πŸ¦– 08/26/19 03:02PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Graham Motzing Graham Motzing 08/26/19 06:21PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/23/19 08:38PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/23/19 09:23PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/25/19 01:43PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/27/19 12:04AM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/27/19 12:08AM
  Re: PW65 Malossi with WWB ceramic bearingsRe: P D P D 08/27/19 09:49AM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/27/19 01:02PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: πΏπ‘–π‘˜π‘Ž-πΏπ‘œπ‘‘π‘Žπ‘ π‘Žπ‘’π‘Ÿ π‘€π‘’π‘”π‘Žπ‘π‘’π‘  πŸ¦– πΏπ‘–π‘˜π‘Ž-πΏπ‘œπ‘‘π‘Žπ‘ π‘Žπ‘’π‘Ÿ π‘€π‘’π‘”π‘Žπ‘π‘’π‘  πŸ¦– 08/27/19 10:09AM
  Re: PW65 Malossi with WWB ceramic bearingsRe: πΏπ‘–π‘˜π‘Ž-πΏπ‘œπ‘‘π‘Žπ‘ π‘Žπ‘’π‘Ÿ π‘€π‘’π‘”π‘Žπ‘π‘’π‘  πŸ¦– πΏπ‘–π‘˜π‘Ž-πΏπ‘œπ‘‘π‘Žπ‘ π‘Žπ‘’π‘Ÿ π‘€π‘’π‘”π‘Žπ‘π‘’π‘  πŸ¦– 08/27/19 12:09PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/27/19 01:03PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/28/19 03:59PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 03/06/20 12:46PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/28/19 04:05PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/28/19 11:48PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Jack Rutherford Jack Rutherford 08/29/19 08:48AM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Mikey Antonakakis Mikey Antonakakis 08/29/19 10:57AM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/29/19 12:19PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: Mikey Antonakakis Mikey Antonakakis 08/29/19 12:33PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/29/19 04:24PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: πΏπ‘–π‘˜π‘Ž-πΏπ‘œπ‘‘π‘Žπ‘ π‘Žπ‘’π‘Ÿ π‘€π‘’π‘”π‘Žπ‘π‘’π‘  πŸ¦– πΏπ‘–π‘˜π‘Ž-πΏπ‘œπ‘‘π‘Žπ‘ π‘Žπ‘’π‘Ÿ π‘€π‘’π‘”π‘Žπ‘π‘’π‘  πŸ¦– 08/30/19 01:07PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/30/19 03:37PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 08/29/19 09:42PM
  Re: PW65 Malossi with WWB ceramic bearingsRe: mat hormell mat hormell 03/05/20 07:39PM

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