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2strokespirit

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  2. You need torque!

    in Banshee Repairs and Mods

    Posted

    If you had read the last sentence, "a good combination between the 2".

     

    For instance a 60 hp motor with 40nm of torque against a 60 HP motor with 55nm of torque, who will win a drag race on hill climbing????? I dont even have to answer that question if the power yo weight ratios are the same..

    Its a true fact when it comes to the racing world. That is where I wil pass you on the hills, sand etc, torque aint meaningless.

  9. K&N Clamp on

    in Banshee Repairs and Mods

    Posted

    I love the K&N filters, but i had a lot of problems getting the midrange right, the bike just dont want to run with clamp on filter,great topend, but thats all, i know that if the filter or distance between carb and filter is to short or have a closed back the pulse or soundwave get reflected and interfere with the amount of fuel getting into the motor. I've put a 2 into 1 y boot system on (by frome yamaha 73-75 RD350 y boot) its really cheap its the same y boot that pro flo use, but much cheaper from yamaha, i bet they get theirs form yamaha. I can get you the part number, anyway it works great, better midrange and jetting sorted. What K&N clamp on do i have to use if i want to replace the y boot with 2 clamp on filters, any have a K&N part number. What mains and pilots will it settle more & less with pro circuit pipes?

    Thanks

    My spelling is not good im from SA

  10. Cool Head

    in Banshee Repairs and Mods

    Posted

    I've got a trail tach vapor onboard computer. www.trailtech.net. Awesome. Revcounter, heat gauge(thats why i am complaining about the cooling, if you get the gauge youll be suprised how hot it run in summer), speed, air temp, avergae speed, hour meter, stop watch, max speed setting, engibe temp. Really nice product. Its nice with the rev counter the shee tops out on standard gearing and tires with my procircuits at 123.4 km/H we adjusted the wheel size on the computer and tested it with gps, it was accurate to the last dot! very nice product

  13. You need torque!

    in Banshee Repairs and Mods

    Posted

    You missed the point, everyone always talk about HP, its meaningless without torque, just like you said torque is meaningless without HP. You need a GOOD combination between the 2. I dont want to start an argumant, but a Formula 1 car has loads of torque for the record. :-) On the banshees the art of tunning is getting a lot of torque over a wider powerband, without losing too much on topend and not any engine builder can do that, you cant have horsepower with no torque you are right, but getting more torque out of a engine wil always let you gain HP, dont missunderstand me, the art is to get the torque over a wider powerband amd get a good combination and you will not believe the differance. I have seen dynos of 75HP and 50nm and then again 61.5HP with 59 nm. The best engine builder is the one that can give you both. So it is possible to get HP without torque, otherwise this $64 102 dyno is full of shit! :-)

     

     

     

    A Ferrari has loads of torque a very good combination :-)

    Dont want to argue. Just an interresting fact!

  14. You need torque!

    in Banshee Repairs and Mods

    Posted

    I agree with you, I dont mean that it wil be better if the basnhees torque was lower. But with more torque at lower rpm it would have had a wider powerband and be better, and we get it out of them, although the RZs have powervalve the Banshees makes much more torque than RZ if their powervalve system is disconnected, because the stock porting helps for the lower rpm power because there is no power valve. Like i said, you need a good combination between the 2. If you go and port a banshee like a RD/RZ350 raise the exhaust port the same hight, and do the transfers you can get almost 60 HP out of the motor with zotall bottem end, it goes like HELL on the topend, if you can spread the powerband wider it will rocks. Theres a local guy here, they still race Banshees in enduros, theyve won the Roof Of Africa with a Laegers 350. If you read the article they say that bike made more torque at lower rpm than the same guys racing YFZ450, I spoke to him, he said in 3rd gear at 4000RPM you can just snap the throtlle and the bike lifts its head up from the ground. I know them personally, like I said, they are known racers here, but again wont give any secrets out! More torque than a YFZ450 at low rpm., sounds almost lik s**!!

  15. Cool Head

    in Banshee Repairs and Mods

    Posted

    Hi I bought mine likea month ago, brand new with Pro Circuit piepes. R50 000 its $6410. Is that alot? This bike was directly inported from USA. Cause it was the last its for that Price, Banshees had sold for $7692 before. Depending on exchange rates!!!

  16. Banshee vs 450

    in Drag Forum

    Posted

    I raced a LTR450(piped with cherry bomb) DS650 and Predator 500, beat them all. 2006 banshee with pro circuits and k&N. If you race on dirt or desert. Best way for a drag race is starting in 2nd gear, I have a trail tech computor on mine, full throttle11000rpm and let the clucth go, its a killer. Dont do it on tar road or hard surfaces. Banshee 1st gear is to slow for dragging on stock gearing.

  17. Cool Head

    in Banshee Repairs and Mods

    Posted

    I do a lot of drag races, and trail. Does the Noss/Pro Design really let the bike run at lower operating temperature? I do not need the head for more power, i just want to purchase it for running cooler.

    Does it really work for better cooling?

    I am from South Africa, riding in 40 - 47 dergrees Celsius.

    I know a bigger radiotor wil help, but its actually the airflow that is the problem on the banshee, not really the radiotor size, anyway, is the cool head worth it for better cooling.

    Thanks

  19. You need torque!

    in Banshee Repairs and Mods

    Posted · Edited by 2strokespirit

    I read alot of Banshee owners is talking of HP figures. You need torque as well, a good combination between torque and horsepower and that is were the Banshee struggles on lower rpm, with the torque. With a lot torque you can get bigger wheels-more traction-better acceleration.

    I am working on some Banshees, not an expert, but trying to get more torque at lower rpm, currently getting 59nM on stock bore and stroke and 60HP, with 14 front sprocket and 38 rear with razr 20-11-9 we do 150+km/h on a GPS. I wil smoke a 70-75HP Banshee that have 50nm or less with the 70-75 HP combination.

    I am a RZ350 tunner, but like the banshees.

     

    First of all, from a driver's perspective, torque, to use the vernacular, RULES :-). Any given car or bike, in any given gear, will accelerate at a rate that *exactly* matches its torque curve (allowing for increased air and rolling resistance as speeds climb). Another way of saying this is that a bike will accelerate hardest at its torque peak in any given gear, and will not accelerate as hard below that peak, or above it. Torque is the only thing that a driver feels, and horsepower is just sort of an esoteric measurement in that context. 300 foot pounds of torque will accelerate you just as hard at 2000 rpm as it would if you were making that torque at 4000 rpm in the same gear, yet, per the formula, the horsepower would be *double* at 4000 rpm. Therefore, horsepower isn't particularly meaningful from a driver's perspective, and the two numbers only get friendly at 5252 rpm, where horsepower and torque always come out the same.

     

    In contrast to a torque curve (and the matching pushback into your seat or handlebars), horsepower rises rapidly with rpm, especially when torque values are also climbing. Horsepower will continue to climb, however, until well past the torque peak, and will continue to rise as engine speed climbs, until the torque curve really begins to plummet, faster than engine rpm is rising. However, as I said, horsepower has nothing to do with what a driver *feels*.

     

    OK. If torque is so all-fired important, why do we care about horsepower?

    Because (to quote a friend), "It is better to make torque at high rpm than at low rpm, because you can take advantage of *gearing*.

     

    For an extreme example of this, I'll describe a waterwheel I got to watch awhile ago. This was a pretty massive wheel (built a couple of hundred years ago), rotating lazily on a shaft which was connected to the works inside a flour mill. Working some things out from what the people in the mill said, I was able to determine that the wheel typically generated about 2600(!) foot pounds of torque. I had clocked its speed, and determined that it was rotating at about 12 rpm. If we hooked that wheel to, say, the drivewheels of a car, that car would go from zero to twelve rpm in a flash, and the waterwheel would hardly notice :-).

     

    On the other hand, twelve rpm of the drivewheels is around one mph for the average car, and, in order to go faster, we'd need to gear it up. To get to 60 mph would require gearing the wheel up enough so that it would be effectively making a little over 43 foot pounds of torque at the output, which is not only a relatively small amount, it's less than what the average car would need in order to actually get to 60. Applying the conversion formula gives us the facts on this. Twelve times twenty six hundred, over five thousand two hundred fifty two gives us:

     

    6 HP.

     

    Like I said, you need a good combination between the 2. If you let your bike dyno, ask the torque figures, not just the Hp.

    Just my opinion and experience

  21. Do It Yourself Porting

    in Banshee Repairs and Mods

    Posted

    Porting, like some said is like art. Just some people can do it, engine builders dont give their secrets away, because it is years of research, trail & error. I have done some porting over the years, on RD/RZ350 and RGV250. I am not an expert, still learning, mess up some and had really great results. Like i said trail & error is the way, but its expensive. Go to www.macdizzy.com, that guy knows what his talking about. Step by step porting instuctions on 2 strokes, they work, done them myself, but a lot of Maths, there you can see how much calculations is in porting. Porting should go with the pipes you have on youre setup. I am from South Africa not easy to get someone who knows what they are doing on the banshees. I am going to do the porting myself on a extra set of cylinders. If any one can send me templates i will appriciate it. Wont neccesary use them, just want to find my way. A Graham Bell has a good book 2 stroke performance tunning, a lot off stuff there will also help.

    My spelling is not very good, cause i am not english.

     

     

    The secret is in the exhaust port height and the transfer heights and angles, there is were the power lies. Get a set off V Force 3 reeds, with good porting you will be amazed by what differance it make, even on a non ported motror with pipes.

    Just my opinion and experience.

  22. Do It Yourself Porting

    in Banshee Repairs and Mods

    Posted

    No payment is necessary. I will scan them and send them to you. You have to make sure you print them @ 100% and on some kind of stiff card stock or something. Sent you a message.

    [size=2Hi I am from South Africa, diffucult to get someone porting your banshee here. If it is possible can you mail me the templates as well. I wil pay you if i had to.

    Thank you

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