scrambler 2stroke 400 compete with a 400ex?
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03-27-2007, 07:43 PM
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03-30-2007, 01:38 AM
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scrambler 2stroke 400 compete with a 400ex?
Originally posted by: 2manytoys
The rule of thumb is that a 2 stroke will have about twice the amount of power of a 4 stroke but in actuality in hP they are about the same. The big difference like you said is the stroke. A 2 stroke is higher revving and produces power twice as fast but a 4 stroke will always have more available torque in all rpm ranges. If you put a 2 stroke and 4 stroke in a pulling contest the 4 stroke will win. 2 strokes dont build power till its upper rpm range while a 4 stroke builds power right off throttle. 2 strokes are much quicker but in reality it builds about the same hp. A stock Banshee puts out about 40 hp. A stock 450r is about 42hp. A stock pred500 is 43hp.
Dont get me wrong I love 2 strokes. I rode a Banshee for about 8 yrs, a highly moded 250tb that would smoke piped 400ex's, my son rides a 90cc 2 stroke that kicks my nephews 150cc 4 stroke a$$, and my boat is a 2 stroke v6. But when you look ar actual dyno results they are about equal in hp and the 4 stroke has more torque.
The rule of thumb is that a 2 stroke will have about twice the amount of power of a 4 stroke but in actuality in hP they are about the same. The big difference like you said is the stroke. A 2 stroke is higher revving and produces power twice as fast but a 4 stroke will always have more available torque in all rpm ranges. If you put a 2 stroke and 4 stroke in a pulling contest the 4 stroke will win. 2 strokes dont build power till its upper rpm range while a 4 stroke builds power right off throttle. 2 strokes are much quicker but in reality it builds about the same hp. A stock Banshee puts out about 40 hp. A stock 450r is about 42hp. A stock pred500 is 43hp.
Dont get me wrong I love 2 strokes. I rode a Banshee for about 8 yrs, a highly moded 250tb that would smoke piped 400ex's, my son rides a 90cc 2 stroke that kicks my nephews 150cc 4 stroke a$$, and my boat is a 2 stroke v6. But when you look ar actual dyno results they are about equal in hp and the 4 stroke has more torque.
In order to do a proper comparison to prove this, one has to look at two motors used for the same thing in close to the same state of tune. examples
500cc two-stroke motogp bike has 200hp. sometimes more if the rider was brave enough to ride it
990cc four-srtoke motogp bike has 200hp. or somewhere in the heighbourhood
250cc two-stroke motocross bike makes around 48 hp
450cc four-stroke motocross bike makes around 50 hp
600cc four-stroke supersport 120 hp
500cc two-stroke motogp bike 200hp
apples to apples
oranges to oranges
#39
03-30-2007, 07:01 PM
scrambler 2stroke 400 compete with a 400ex?
does that mean that you can get a suzuki lt500r (quadzilla two stroke) from the 80s to pump out 150 horses?? i know it would take a lot more to get that last 50 hp out of it.
i would want to race one against a snowmobile. i bet it would kill and rx1 or an apex
i would want to race one against a snowmobile. i bet it would kill and rx1 or an apex
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03-30-2007, 09:05 PM
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scrambler 2stroke 400 compete with a 400ex?
Originally posted by: crazy1291
does that mean that you can get a suzuki lt500r (quadzilla two stroke) from the 80s to pump out 150 horses?? i know it would take a lot more to get that last 50 hp out of it.
i would want to race one against a snowmobile. i bet it would kill and rx1 or an apex
does that mean that you can get a suzuki lt500r (quadzilla two stroke) from the 80s to pump out 150 horses?? i know it would take a lot more to get that last 50 hp out of it.
i would want to race one against a snowmobile. i bet it would kill and rx1 or an apex
but a cr 500 had like 60 hp, i'm sure it could make 80 if honda wanted it to. they realized that 60 hp was too much as it was so nobody bothered.
If you look at my comparisons they all had the same number of cylinders. One would have to know about moto gp bikes to realise that. If you consider a 125 two-stroke dirt bike could make 40 hp, with high compression running on high octane fuel (so it doesn't grenade right away) Put four of them together on one crank and voila 160 hp. then factor in running off one crank and turning higher rpm. 200 hp and more is possible.
But not with one cylinder.