blaster2006 Posted January 25, 2009 Report Share Posted January 25, 2009 heya, i was wondering, whats the difference.. between the same displacement if you had a 350 CC twin and a 350 single. knowing that the banshee is 173.5cc per cylinder, which makes it 347cc since its a twin wouldnt it be better to make a single 350cc? whats the difference? is it the Twins accelerate faster, but less power? or what? if the banshee was a 350 single, in which areas would it be better? Quote Link to comment Share on other sites More sharing options...
notsed Posted January 25, 2009 Report Share Posted January 25, 2009 single cylinder makes more torque but dont rev as high and twins are opposit, thats why banshee's scream and usually are all mid to top power Quote Link to comment Share on other sites More sharing options...
AKheathen Posted January 25, 2009 Report Share Posted January 25, 2009 (edited) single cylinder makes more torque but dont rev as high and twins are opposit, thats why banshee's scream and usually are all mid to top power actually, that's the dofference between a 2 and 4 stroke. twins have better balance, giving more mid-bottom end to the 2 stroke. single cylinders either scream, or have more bottom, but at a narrower powerband. look at the blaster, yfz450, raptor, etc. the twins have more of a full range, like the banshee, and 650ds. Edited January 25, 2009 by AKheathen Quote Link to comment Share on other sites More sharing options...
blaster2006 Posted January 25, 2009 Author Report Share Posted January 25, 2009 hehe, i actually used to think that, the banshee was 2x 350 ccs and ddnt know that having a Vtwin is ADDING the ccs lol. i thought just having a vtwin would give more pull power and acceleration, ddnt know it doubles the displacement. but i think a 350 single would be faster though, regardless... alot of vids i see vs 250r's and they either draw, or one of them wins by a small bit. so imagine a 350 single with like a 40mm or 38mm carb, and high compression, would be insane. but would wear out much faster from the bigger stroke, i think its also why they made the banshee 2 small twins, less wear out quicker Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted January 25, 2009 Report Share Posted January 25, 2009 actually, that's the dofference between a 2 and 4 stroke. twins have better balance, giving more mid-bottom end to the 2 stroke. single cylinders either scream, or have more bottom, but at a narrower powerband. look at the blaster, yfz450, raptor, etc. the twins have more of a full range, like the banshee, and 650ds. this whole post is ridiculous. because the twins are balances it gives them more mid-bottom end? bullshit. where did you come up with this? banshees have little if any mid-bottom end. single cylinders either scream or have more bottom end but have a narrower powerband? once again thats bullshit. single cylinder motors such as the cr250, cr500 and all the 4 stroke singles have a much more broad powerband than the banshee. they begin making power at very low RPM's and pull until they reach the high R's. your info is very flawed and im not sure how you came to the conclusions you arrived at. you need to research before you spout off info that is incorrect and just plain doesnt make any sense. Quote Link to comment Share on other sites More sharing options...
fastrthnu Posted January 25, 2009 Report Share Posted January 25, 2009 The way I see it, the crank turns more and the piston/rods travel less. The pistons and rods work less to spin a higher rpm. This slower piston travel vs crank rotation will affect timing at the ports differently. Longevity of cylinder/ring life. Id consider a banshee motor more twin inline ratehr than a "v" twin. Quote Link to comment Share on other sites More sharing options...
dajogejr Posted January 26, 2009 Report Share Posted January 26, 2009 This info is like saying the 318 in a dodge truck will rev as far, have as much torque as an 8 cylinder porche... Every engine is different. Period. What works on a four stroke vs. what works on a two stroke are two different things. Just like what works on a single vs. what works on a twin are different... When you say a 350cc twin vs a 350 single, what exactly are you talking about? Two stroke or 4? Larger bore and smaller stroke, or vice versa... With power valves, without, case reed or intake reed?(two stroke) In general... smaller pistons on the same stroke crank will rev faster and make their peak HP at a higer RPM than the same size displacement shorter stroke, larger bore. But there are no gaurentees. Here's an example... My bike revs out to probably 11K RPM. Makes power to 10,500... It has a 64mm stroke and 68mm bore. It makes roughly 120HP, give or take. My buddy has a big block twister. It has a 78mm stroke and 84 cc bore. It revs out to less than 10K and makes power till probably 9,500. It's almost double the cc. So what does that mean, bigger is better, faster, more? No... Each is different, period. What is your question? Quote Link to comment Share on other sites More sharing options...
dragbanshee Posted January 26, 2009 Report Share Posted January 26, 2009 Dont ask Dave..lol Quote Link to comment Share on other sites More sharing options...
05.Banshee.SE Posted January 26, 2009 Report Share Posted January 26, 2009 Vtwin is more of a motorcycle term IMO... I'd imagine the less travel and two smaller pistons also means less fuel consumption at higher RPMs, compared to a single cylinder of the same cc having to travel further... Quote Link to comment Share on other sites More sharing options...
Dinner Posted January 26, 2009 Report Share Posted January 26, 2009 Inline twin cylinders fire opposite of each other, while one is coming up..the other is going through it's power stroke (2 stroke). The crank doesn't really have a delay/stall time as much as a single cylinder Quote Link to comment Share on other sites More sharing options...
AKheathen Posted January 26, 2009 Report Share Posted January 26, 2009 this whole post is ridiculous. because the twins are balances it gives them more mid-bottom end? bullshit. where did you come up with this? banshees have little if any mid-bottom end. single cylinders either scream or have more bottom end but have a narrower powerband? once again thats bullshit. single cylinder motors such as the cr250, cr500 and all the 4 stroke singles have a much more broad powerband than the banshee. they begin making power at very low RPM's and pull until they reach the high R's. your info is very flawed and im not sure how you came to the conclusions you arrived at. you need to research before you spout off info that is incorrect and just plain doesnt make any sense. your not looking at the same engines to base your comparison. like dave says, but i didn't want to go into detail, because i was headed to work, you have to look at the same engine in 1 and 2 cylinder. they would have to have the same bore/stroke ratio, same induction, without any sort of balancing device. th closest comparison i can give you would be like a f1 engine vs. a 4 banger. never mind the power difference, but when set up the same, the v8 will have a longer pwer curve, than the 4 cylinder. you also can't compare 2 different types of machines, because your fuckin up the hp/weight ratio. that's like pitting a r6 against a rmk, not even a plausable comparison. any motor can be tuned for what you need, but strictly stayin on subject, i stick to my previous post. Quote Link to comment Share on other sites More sharing options...
SpecialEd 05 Posted January 26, 2009 Report Share Posted January 26, 2009 Inline twin cylinders fire opposite of each other, while one is coming up..the other is going through it's power stroke (2 stroke). The crank doesn't really have a delay/stall time as much as a single cylinder Agreed. Which is why Banshee's generally have trouble "hooking up" and putting power to the ground. If you've ever noticed when following a 4-stroke you can see the dirt pulsate out from behind the rear wheels under acceleration. Banshee's however have a constant shower stream. Quote Link to comment Share on other sites More sharing options...
AKheathen Posted January 26, 2009 Report Share Posted January 26, 2009 ok, jut looked at my first post again, and my examples are contradictive to my last post, save for the blaster, because that's pretty close, but you'd have to really mod the banshee to match it for comparison. as for the balance, i did mean that one side caries the other on the low end, and rotational mass does the work on the top end. Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted January 26, 2009 Report Share Posted January 26, 2009 your not looking at the same engines to base your comparison. like dave says, but i didn't want to go into detail, because i was headed to work, you have to look at the same engine in 1 and 2 cylinder. they would have to have the same bore/stroke ratio, same induction, without any sort of balancing device. th closest comparison i can give you would be like a f1 engine vs. a 4 banger. never mind the power difference, but when set up the same, the v8 will have a longer pwer curve, than the 4 cylinder. you also can't compare 2 different types of machines, because your fuckin up the hp/weight ratio. that's like pitting a r6 against a rmk, not even a plausable comparison. any motor can be tuned for what you need, but strictly stayin on subject, i stick to my previous post. you have no idea what youre talking about.. in this post you say that i cant compare engines that are comparable, yet in your first post you say this.. actually, that's the dofference between a 2 and 4 stroke. twins have better balance, giving more mid-bottom end to the 2 stroke. single cylinders either scream, or have more bottom, but at a narrower powerband. look at the blaster, yfz450, raptor, etc. the twins have more of a full range, like the banshee, and 650ds. now in this post, you talk about 2 and 4 strokes. you also lump the blaster, yfz450 and raptor in the same category. then you go onto to lump the banshee and ds650 in the same category? are you out of your fucking mind? you couldnt have picked a more diverse group of bikes to make your shitty comparison.. lets just break it down a little bit.. blaster - single cylinder 2 stroke yfz450 - single sylinder 4 stroke DOHC raptor - single cylinder 4 stroke SOHC banshee - twin cylinder 2 stroke ds650 - single cylinder 4 stroke DOHC the problem here is that you have no idea what youre talking about. why would you even give these examples to later come back and say, "you have to compare 2 engines that are the same." then you go and throw some stupid line in about their weight/power ratio... i thought we were comparing power curves, in which case weight/power ratio doesnt even apply? you can stick to your previous post, but you and everyone else knows its dog shit. Quote Link to comment Share on other sites More sharing options...
AKheathen Posted January 26, 2009 Report Share Posted January 26, 2009 yah, i threw the 650 in th wrong cat, but i was standing up to walk out the door to work, not payin attention when i threw them in there. i was just refering to the power curves Quote Link to comment Share on other sites More sharing options...
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