KX Riders
General => In General... => Topic started by: stewart on March 04, 2009, 01:16:18 AM
-
230327993664 on ebay this is the ebay number maybe some one can link it,,,
linked: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ru=http%3A%2F%2Fmotors.shop.ebay.com%3A80%2F__%3F_from%3DR40%26_trksid%3Dm39%26_nkw%3D230327993664%26_fvi%3D1&item=230327993664&_rdc=1&viewitem=
-
Don't realy see how this thing can make HP?!!
It only makes the intake smaller.
Dutch
-
Buyer beware, the part he is selling is not even made yet. There are no pictures of what you are buying, there are no claims of how this fits. His description is also vague.
Personally I would not want to be the first to send him money. I also would not want to be the first to try his product.
The machine work on the supercharger that is not for sale, looks good. But why would someone show me what is not for sale ?
The seller may do perfect work and his product may be flawlessly perfect, and his price may be the best in the world. But ??
Just my thoughts. John
-
Looks like gimmick to me :? I might go as far as to call it B/S :-P
-
Your right jonnie i wouldnt be the first or the last to give him money i dont understand how that makes more HP but someone will pioneer it and hopefully we get some feedback but for now im sticking with you guys on this one so far B/S
-
All in! :-D
-
There is supercharged outboard motors so after rethinking it, it may work :?
-
dordie's picture at least shows something that is complete and produced. I would be less skeptical of that. Now if the listing said it fits, it is a bolt on. Tested on a dyno. Many happy customers, then I would rethink my position. But for now, I will wait.
John
-
That pic is of a turbocharger setup. We have turbocharged snowmobiles where I live. Guys get them for hill climbing at high altitude. Nothing like whine of a 3cyl 800cc turbo sled wailing up a valley you get your blood going (when you are skiing). Cam.
-
stewart, this question peaked my curiosity,, looks possible. Found this supercharger website for small remote control 2 strokes http://www.rbinnovations.com/ . What I know of Supercharger vs Turbocharger is from everything but motorcycles. The powerband hit of a turbo is hard to handle usually. Supercharged is smoother power from bottom to top. The coolest turboed motorcycle I've seen was a hillclimber with a Harley, you could hear it whistling all the way to the top of the hill. Seen many in snowmobiles a friends Yamaha Apex stock was 150hp with supercharger 225 to 300 depending on how fast you want to wear out the motor.
Is anyone out there working on one for KX500?
-
stewart, this question peaked my curiosity,, looks possible. Found this supercharger website for small remote control 2 strokes http://www.rbinnovations.com/ . What I know of Supercharger vs Turbocharger is from everything but motorcycles. The powerband hit of a turbo is hard to handle usually. Supercharged is smoother power from bottom to top. The coolest turboed motorcycle I've seen was a hillclimber with a Harley, you could hear it whistling all the way to the top of the hill. Seen many in snowmobiles a friends Yamaha Apex stock was 150hp with supercharger 225 to 300 depending on how fast you want to wear out the motor.
Is anyone out there working on one for KX500?
I help run one of the largest RC car websites. (Threads: 50,800, Posts: 628,021, Members: 16,013).. not naming names.. The RB-inovtions kits are for LOOKS ONLY. they dont work.. I can pull up dyno proof for you if you wish.
I tryed to stay away from this post. but think how a 2 stroke motor works... now think of what a Super charger does.... it makes the 2 stroke not work right. (think how the exaust works, scavnging of the motor, etc..)....
Now a Turbo. which is what the posted picture was... is a different story, it only uses it when it needs it (higher rpm where its hard for a 2 stroke to scavange right.)
bottom line. Supercharged 2 stroke = LARGE GIMMIC!!
-
I can't comment on whether any of the superchargers mentioned ABOVE work, but I dont think its fair to say 2 strokes can't be supercharged at all, or that there is no benefit (whether or not its relevant to 2 stroke motorcycles is another question....)
Anyways, think back to the "classic" superchargers people run on V8's, most popular in the 60's to 80's - the "71 series" roots blowers - the most common of which was the 6-71
From what I understand, that term came from the fact that it was originally on a 6 cylinder engine with 71 cubic inches per cylinder..... and that engine was a 2 stroke GMC diesel ...! (and there were 8-71's, for 8 cylinder engines, 10-71's, etc etc... they just added cylinders to the base model as needed - like a "new" modular engine....)
So, I dont think the concept of a supercharged 2 stroke engine is inherently flawed. Its probably not suitable for a bike, OR simply poorly designed / built by the aftermarket suppliers mentioned earlier
EDIT - Now, as I think about it, I think the 71 series had valves like a 4 stroke ? At least on the exhaust side.
So maybe -I'M a moron (always a possibility)..... So... has anyone heard of a supercharged 2 stroke without the poppet exhaust valves ?
-
Of course a super charger would work on a two stroke. :| That's a fact. I think the real question is the so called super charger that stewart had found offered online. It's not really a super charger. It's some weird crap with no moving parts that some guy is claiming is a super charger.
-
All in! :-D
Doordie,
That is the engine from the Bubfab Streamliner.....248 m.p.h. on 50cc at Bonnieville last year!
Oh yeah, the driver is about 5' 2" and maybe 128 lbs :-D
Mark
-
I found and article and supercharged two-strokes it seems a company has a patient on it , but im sure that dosent mean we cant do it ourselves, especially if the results they advertise are true. here is what theay say
Forced Induction Crankshafts
A patented modification for all two stroke applications!
Dirt Bikes, Snowmobiles, Personal Watercraft, ATV's, Chainsaws, and more!
The Parris Racing Concepts forced induction crankshaft modification works by cutting veins into the crank halves of the crankshaft. The veins are cut at specific angles into one crank half, and then a mirror image is cut into the other crank half. As the crankshaft spins, these veins pick up the fuel/oil mixture inside the crankcase. A process called flow dynamics then routes the fuel/oil mixture down the veins where it is directed at the transfer ports of the crankcase. When the engine enters its intake stroke, the extra fuel/oil mixture is pulled into the cylinder. The flow dynamics affect also atomizes the fuel/oil mixture in a way that allows a cleaner, more complete burn inside the combustion chamber.
The PRC forced induction crankshaft modification will work on any two stroke engine, i.e.; snowmobiles, dirt bikes, quads, jet skis, and even chainsaws. We modified a 2008 Suzuki RM250. It was found to gain 15.74% percent in HP and 18% in torque. Below is a comparative dyno showing the stock vs. mod results. The PRC modification produces enough torque that it has nearly eliminated the power band. A motor with a PRC, Inc. forced induction crankshaft pulls as hard all the way through the RPM range as a stock motor does once it hits its power band. Therefore, the modified machine gets to top speed faster than any stock machine currently available.
www.parrisracingconcepts.com
-
Lewis And Crew tested that RM250 in this months issue. They had some positive remarks, BUT, they did NOT report of an 18% increase in power, which I am sure they would have if it was there.
-
I got info from the website did you read?
-
Yes, I did read. I am very optimistic concerning big increase in numbers as stated, but I will be first in line to spend the money if it works. If you look at the dyno sheet, it shows the 2008 RM250 only producing 37.94 hp before (all info I have read & seen that bike makes 44 Plus stock) & an after of 43.01 hp. It could just be the dyno (I know not all dynos read the same) but I think that is a very large difference in numbers (I would think a clapped out RM would make at least 38 RWHP). I am not trying to be Negative, just very skeptical as alot of Companies Claim big numbers that they can not produce, just ask KX560 about his experience with such Company (If memory serves me "It made a Case Splitting 61 HP")
-
spend your money on a... pet rock..
-
i should not respond that frankly, but i think the turbo crank idea is a gimmick , not a power gain .
-
Up here they have a turbo class for sleds. They have been turboing 2 stroke sled motors for 20 years.
http://www.youtube.com/watch?v=IRfEvzLUGSs&feature=related
-
I found and article and supercharged two-strokes it seems a company has a patient on it , but im sure that dosent mean we cant do it ourselves, especially if the results they advertise are true. here is what theay say
Forced Induction Crankshafts
A patented modification for all two stroke applications!
Dirt Bikes, Snowmobiles, Personal Watercraft, ATV's, Chainsaws, and more!
The Parris Racing Concepts forced induction crankshaft modification works by cutting veins into the crank halves of the crankshaft. The veins are cut at specific angles into one crank half, and then a mirror image is cut into the other crank half. As the crankshaft spins, these veins pick up the fuel/oil mixture inside the crankcase. A process called flow dynamics then routes the fuel/oil mixture down the veins where it is directed at the transfer ports of the crankcase. When the engine enters its intake stroke, the extra fuel/oil mixture is pulled into the cylinder. The flow dynamics affect also atomizes the fuel/oil mixture in a way that allows a cleaner, more complete burn inside the combustion chamber.
The PRC forced induction crankshaft modification will work on any two stroke engine, i.e.; snowmobiles, dirt bikes, quads, jet skis, and even chainsaws. We modified a 2008 Suzuki RM250. It was found to gain 15.74% percent in HP and 18% in torque. Below is a comparative dyno showing the stock vs. mod results. The PRC modification produces enough torque that it has nearly eliminated the power band. A motor with a PRC, Inc. forced induction crankshaft pulls as hard all the way through the RPM range as a stock motor does once it hits its power band. Therefore, the modified machine gets to top speed faster than any stock machine currently available.
www.parrisracingconcepts.com
I declare shenanigans! This is something that has been drummed up time and again over the years and has been disproved to work time and again.
-
Last I heard the weight reduction of the crank makes your seat of the pants dyno think you have more horsepower but in actuality it isn't spinning fast enough in relation to the air coming in and going out to do anything.
-
Last I heard the weight reduction of the crank makes your seat of the pants dyno think you have more horsepower but in actuality it isn't spinning fast enough in relation to the air coming in and going out to do anything.
That is correctamundo my friend. If you could make something like that work it would have to be ducted some how like a ducted fan. It would also have to spin faster then the engine in order to have a super charging effect. If you could make it work it would cause a vacume in the crank case that would hold the reeds open indefinitely, not sure what that would do :|
-
We would probably have better luck with one of those electric super chargers. While the piston is up it could ram maybe 1/2 - 2psi worth in there then the piston comes down and shuts the reeds pushing the pressure higher. Meanwhile the little motor builds a bit of pressure in the intake tract which is ready to blow through the reeds as soon as the pressure is higher than in the case. Would gain more on low end than on top though and who knows if the few hp gained would be worth having to carry around a Lithium Ion Battery.