| Author |
Message |
    
Tigerbythetail
| | Posted on Tuesday, June 12, 2007 - 03:45 pm: | 
|
happy now?
tiger
(Message edited by tigerbythetail on June 12, 2007) |
Djkaplan
| | Posted on Tuesday, June 12, 2007 - 04:22 pm: |
|
"happy now?"
I'm indifferent.
I would have preferred that you defended your statements instead of deleting them.
I never said you were wrong about anything you posted, just about who they were aimed at. |
Smokescreen
| | Posted on Tuesday, June 12, 2007 - 04:27 pm: |
|
They have never seen you run up Blood Mountain behind me on that slow M2!
If you pick when and where you battle, you can almost never lose! Even though an M2 will out pull my XB9S in the straights!! Man what good times. Thanks for reminding me of that Dan, you just made my day!
Smokescreen |
Djkaplan
| | Posted on Tuesday, June 12, 2007 - 05:00 pm: |
|
"Even though an M2 will out pull my XB9S in the straights!!"
That's something I thought I felt good about until I looked at the situation. We were going up a slight incline, I have a larger displacement bike with more torque, and you are taller and heavier than me - the math worked in my favor.
If I let myself feel good about passing you like that, I'm no better than the idiots on Japanese sportbikes who think they're doing something great by passing me on the straights. The simple fact of the matter was that when the corners started coming again, you were either going to pass me, or I was going to accidentally run you off the road... the decision to wave you by wasn't hard... at all. I'll never be able to pass you the way I want to, Phil.
Coming into the parking lot at the lodge on top of Blood Mountain with the rest of the group well behind us was one of the biggest days of my life, man.
I mean that. |
Smokescreen
| | Posted on Tuesday, June 12, 2007 - 05:25 pm: |
|
Coming into the parking lot at the lodge on top of Blood Mountain with the rest of the group well behind us was one of the biggest days of my life, man.
I mean that.
Just let me know when you want to go for a ride again!
I'll never be able to pass you the way I want to
Never say never, keep practicing and I bet you'll do it one day soon!
Smokescreen |
Ft_bstrd
| | Posted on Tuesday, June 12, 2007 - 05:49 pm: |
|
Smoke, DJ, you guys coming up for Buelltoberfest? |
07xb12scg
| | Posted on Tuesday, June 12, 2007 - 08:05 pm: |
|
Or wait for the magical new Buell in around one month's time of course...........
HAHA! With my luck there will be brand new liquid-cooled Buells this year, though. 
You guys should read articles on the insane piston speeds and the accompanying insane forces that are acting on a rod and piston just trying to rip the two apart.
Take Buell's 3.812 inch stroke at 6,800 RPM and that equals a piston speed of 4,320.27 feet per minute or 49MPH.
So just think about that for a second. The piston goes from 0 MPH to 49 MPH and back to 0 MPH again in just 3.812 inches. Just think about the forces that the connecting rod faces trying to hold that piston on. And it does this 1,700 times per minute!
I was lazy and used an online piston speed calculator so don't blame me if it's wrong. |
Ft_bstrd
| | Posted on Tuesday, June 12, 2007 - 08:32 pm: |
|
And it does this 1,700 times per minute!
I'm from Tennessee and math is hard.
I don't think my engine works like yours does. |
Smokescreen
| | Posted on Tuesday, June 12, 2007 - 08:53 pm: |
|
you guys coming up for Buelltoberfest?
Why of course I'm coming! You'll be in my back yard!
Smokescreen} |
07xb12scg
| | Posted on Tuesday, June 12, 2007 - 08:55 pm: |
|
I'm from Tennessee and math is hard.
I don't think my engine works like yours does.
Wow! My bad. I know I'm tired, but still that's no excuse for a mistake like that! I meant to multiply 6,800 x 4, not divide... :P
6,800 (revolutions of crank per minute) x 4 (piston strokes per revolution) = 27,200 strokes per minute
So it does it 27,200 times per minute! |
Pushrodpete
| | Posted on Tuesday, June 12, 2007 - 11:26 pm: |
|
One more time...
The piston goes UP once per revolution, and DOWN once per revolution (2 "directional changes"/rev, if you will). ERGO:
6800 rev/min * (2 directional changes/rev) = 13600 directional changes/min
Now what were we talking aboot again...??? |
Ft_bstrd
| | Posted on Tuesday, June 12, 2007 - 11:35 pm: |
|
Pushrod,
Aren't our bikes four strokes? |
Paintballtommy
| | Posted on Tuesday, June 12, 2007 - 11:42 pm: |
|
yes four stroke in the sense that the piston comes down pulls in gas, goes up and compresses and ignites it, goes back down and then goes up and exhausts the burnt stuff and then repeats again. ie there is 4 steps to this combustion in the 4 stroke process. 1080 degrees between each combustion stroke |
Pushrodpete
| | Posted on Wednesday, June 13, 2007 - 01:06 am: |
|
"4-stroke" means 4 "directional changes" per firing cycle (down/up/down/up).
DOWN - as the fuel/air is pulled in
UP - as you compress the fuel/air
DOWN - as the stuff explodes
UP - as the exhaust goes out
This takes TWO revolutions, or 720 degrees.
But then again, what do I know? I own a Kawasaki Mach IV 2-stroke....  |
Paintballtommy
| | Posted on Wednesday, June 13, 2007 - 01:27 am: |
|
oops sorry i ahd a brain fart i separated the power stroke and exhaust stroke as 2 seperate events in my head for soem reason |
07xb12scg
| | Posted on Wednesday, June 13, 2007 - 08:12 am: |
|
One more time...
Don't mind me...
I'll blame it on the meds!
Anyway, what I was getting at is that the piston moves very fast, travels a ton of distance, and sees insane forces. Next time I won't attempt elementary math unless I'm awake and healthy! :P
How's the 2 stroke Kawi? I want a 2 stroke street bike bad! |
Pushrodpete
| | Posted on Wednesday, June 13, 2007 - 08:52 am: |
|
A 2-stroke Buell is at the top of my wish list for July (again). As IF....
Still -- think of the "Buell-ish" advantages of a 2-stroke:
1) Unique
2) Small parts count/ease of maintenance (no valve train)
3) Approx 2x the power output/cc of a 4-stroke (a power stroke every crank revolution)
4) Compact, lightweight
5) An opportunity for some REALLY funky exhaust engineering
6) An exhaust note that will confuse and annoy those riding rice rockets ("Sounds like a trashcan full of chainsaws!")
Come on Erik! Pleeeeeeeeeease??? This would even bring you back to your racing roots.... |
Djkaplan
| | Posted on Wednesday, June 13, 2007 - 09:26 am: |
|
you guys coming up for Buelltoberfest?
I should know by Buelltember if I can make it, but it's a go for now. |
Ft_bstrd
| | Posted on Wednesday, June 13, 2007 - 11:06 am: |
|
Hope to get a chance to ride with you, Dj and Smoke. |
07xb12scg
| | Posted on Wednesday, June 13, 2007 - 12:00 pm: |
|
A 2-stroke Buell is at the top of my wish list for July (again). As IF....
I'd love a new 2 stroke street bike and ATV of any kind. It is wholly possible to create an EPA-legal 2 cycle engine. Just look to Bombardier for this. |
Sloppy
| | Posted on Wednesday, June 13, 2007 - 12:32 pm: |
|
I always looked at a Buell as a two-stroke hybrid. It has the bottom end of a two stroke with a top end of a 4 stroke... |
Smokescreen
| | Posted on Wednesday, June 13, 2007 - 01:26 pm: |
|
Hope to get a chance to ride with you, Dj and Smoke
You can count on it!
Smokescreen |
Glitch
| | Posted on Wednesday, June 13, 2007 - 01:31 pm: |
|
Oh! can I ride with you guys?
Please!? |
Fullpower
| | Posted on Wednesday, June 13, 2007 - 01:53 pm: |
|
There may have been a time when 2-stroke engines made twice the Horsepower of similar sized 4 strokes, but that is no longer the case. with short stroke multivalve 4 strokes turning 14,000 rpm and higher, the advantages in volumetric efficiency, and area under the torque curve have pretty much rendered the oil-burning piston port 2-smoke engine obsolete.
If you LIKE them for sentimental reasons that is fine, enjoy the simplicity, the smell of premix burning, etc. |
Sloppy
| | Posted on Wednesday, June 13, 2007 - 07:03 pm: |
|
The beauty of a two stroke is lower weight, reduced complexity, higher engine speeds and best of all, lower manufacturing and raw material costs. It's funny how the enviro-nazi's don't take raw materials & energy of manufacturing into account...
So it's cheaper, simpler and lighter to run than a 4 stroke. Obsolete??? Hardly!
All what's needed is a way to inject the fuel directly into the combustion chamber in order to get it to be cleaner burning... and the technology is available, it just needs to be developed.
There was a time that Deisel's were thought to be polluting slugs... now they are clean and fast (they've always been efficient) and soon to be the future. Who'd have thought that a Deisel would win Le Mans???
2 strokes will always be with us... |
07xb12scg
| | Posted on Wednesday, June 13, 2007 - 11:07 pm: |
|
There may have been a time when 2-stroke engines made twice the Horsepower of similar sized 4 strokes, but that is no longer the case. with short stroke multivalve 4 strokes turning 14,000 rpm and higher, the advantages in volumetric efficiency, and area under the torque curve have pretty much rendered the oil-burning piston port 2-smoke engine obsolete.
If you LIKE them for sentimental reasons that is fine, enjoy the simplicity, the smell of premix burning, etc.
Extremely high RPMs and previously unheard of power numbers from 4 strokes come at the expense of greatly reduced reliability and severely increased maintenance. The 450cc 4 stroke dirt bike engines have piston replacement schedules that rival that of 2 strokes.
I disagree that 2 strokes are obsolete. With R&D similar to what the 4 strokes are seeing, 2 strokes would be cheap, reliable, and powerful engines. Plus, there are 2 stroke engines that exist that have less emissions than current 4 stroke engines. Why don't the factories support 2 strokes? IMO it's because it will be harder to make 2 strokes EPA legal in the future and because it is much easier to control the power of a 4 stroke. |
Pushrodpete
| | Posted on Thursday, June 14, 2007 - 12:20 am: |
|
Oh happy day! I'm amongst friends! Even the "Little Bird Express" thread has taken on a certain burnt-oil smell....
LOL
Usually, my pleas for a smoker fall on deaf ears. OR torches and pitchforks...
Sure, carb'ed piston-ports are obsolete (but f'in FUN), but figgering out how to modernize the concept is why Erik gets the big bux... or at least he'd get MY big bux if he built me a 2-smoke.
And premix? Even my 32-year old H2 has a separate oil tank with a pump..... |
Djkaplan
| | Posted on Thursday, June 14, 2007 - 06:31 pm: |
|
"Hope to get a chance to ride with you, Dj and Smoke"
Bring some of that stuff to drink that made everyone lose parts of their memory when they were hanging out with you. Some of those guys were thanking me the next day for bringing it.
Whatever it was, it sounds goooood.... |
Ft_bstrd
| | Posted on Thursday, June 14, 2007 - 08:05 pm: |
|
I'll have to talk with the "hooch fairy".
That was some good stuff!
I'll see what I can do if you bring a few extra of those little cigars you were smoking.
Those smelled awesome! I meant to ask you what they were, but I missed the opportunity. |
|
