pdxgoldwing
New member
ok...I am at a loss...why does the spyder idle at such a hi rev?....I know its a high reving motor...but why at idle?
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question about motor revs
- Thread starter pdxgoldwing
- Start date
BajaRon
Well-known member
Because the Spyder doesn't make a lot of torque down low. BRP could have set the idle lower but more people would be stalling it from a dead stop, especially on an uphill situation. Maybe not so big a deal on the autos but on the manuals it is until you get used to it.
Demo rides would have more of a negative factor if people found themselves stalling at intersections.
The other reason may be that because the magnito doesn't put out much (or anything at all) at low RPM. BRP may be spinning the motor a bit to make electricty.
That's my story and I'm sticking to it (unless someone comes up with better).
opcorn:
Star Cruiser
New member
:agree: I don't think that 1,400 rpm is that high. Seems the R1 Yamaha is in the same ballpark and it's power-band is only slightly higher
BajaRon
Well-known member
Mine doesn't get down to 1,400 very often. It's usually up at 1,500~1,600. Then again, I'm not sure how accurate the tach is either.
ARtraveler
R.I.P. Dwayne
My :spyder2: idles at 1400 RPM
A
arntufun
Guest
NancysToy
Motorbike Professor
It is most likely to satisfy EPA emissions requirements. I do believe Ron's list plays into it, too. I suspect BRP did not address the emissions in a different way because this solution provided these extra benefits. Of course I am merely speculating. Fortunately, my racing heritage has served me well, and it doesn't really bother me any more. This thing idles like a top fuel car!
Bob Denman
New member
...1400 to 1450 rpm here... If it works; then it works for me! :thumbup:
BajaRon
Well-known member
Coming off any high torque machine (like my Suzuki M109R) it does take some getting used to. I stalled my Spyder at first when I wasn't paying attention and just let reflexes try to get me off the line.
I'll probably ground loop my M109R, if I ever ride it again!
:agree: The first time i pulled off my driveway with my TG , And i popped the clutch the front wheel came up a foot. Won't do that again!!
Dick Wells
New member
A Formula 1 engine will idle at 6,000 - 7,000 RPM, so I guess we should be thankfull that we have such a stump-puller installed in our Spyders.
:spyder:
:spyder:
There is a basic equation which states that hp = PxLxAxN / 33000
where P is the mean effective cylinder pressure
L is the stroke in feet.
A is the cylinder cross sectional area
N is the Revs per minute.
The internal pressure in the cylinder is under the control of parameters necessary for efficient combustion.
The L and A terms are subject to engineering and cost controls but, as the Japanese realised when they entered road racing, you can increase the HP by increasing the RPM to unheard of (at that time) levels.
So now we have V-twins able to spin at sub-10K RPM in great comfort.
Hope this helps the understanding.
where P is the mean effective cylinder pressure
L is the stroke in feet.
A is the cylinder cross sectional area
N is the Revs per minute.
The internal pressure in the cylinder is under the control of parameters necessary for efficient combustion.
The L and A terms are subject to engineering and cost controls but, as the Japanese realised when they entered road racing, you can increase the HP by increasing the RPM to unheard of (at that time) levels.
So now we have V-twins able to spin at sub-10K RPM in great comfort.
Hope this helps the understanding.
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