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Old 09-20-2012, 11:59 AM   #1
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Joined: Jun 2011
From: Yakima, WA

I Ride: 1199 Panigale
High RPM
So a question for everyone: What is the highest revving motorcycle currently in production? And before some smart-ass comments about how RPMs don't equal power or speed, I don't really care and that's not the question.

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Old 09-20-2012, 12:39 PM   #2
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Joined: Mar 2006
From: spokane, wa

I Ride: 2013 Gasgas 300xc w/lic plate + 1985 RZ350 + 2010 YZ250F +
My 06 r6 had a 17500 red line!

And rpm absolutely equals hp. There are only two other numbers that are part of the formula and one is a constant.

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Last edited by fastfoodfred; 09-20-2012 at 12:48 PM..
 
Old 09-20-2012, 12:48 PM   #3
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Joined: Jul 2007
From: Or
MTT Turbine SUPERBIKE

Engine: Rolls Royce Allison, 250 series gas turbine
Power: 320-HP @ 52,000-rpm, (286-HP @ rear wheel)
Torque: 425-ft/lbs @ 2,000-rpm

-R

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Old 09-20-2012, 12:49 PM   #4
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Joined: Mar 2012
From: Gig Harbor, WA
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I Ride: 2000 BRP (XR650R)
“ Quote:
Originally Posted by fastfoodfred View Post
My 06 r6 had a 17500 red line!
I imagine other bikes will max out around there as well. In order to get the 20k+ RPM you need to have pneumatic valve "springs" IE, valves are pushed back by compressed air, not springs. I heard F1 car engines before all the rules were made were getting engine rpm's of close to 30k! (have not fact checked that, i am sure you can google it)

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Old 09-20-2012, 12:52 PM   #5
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Joined: Mar 2012
From: Gig Harbor, WA
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I Ride: 2000 BRP (XR650R)
“ Quote:
Originally Posted by fastfoodfred View Post
My 06 r6 had a 17500 red line!

And rpm absolutely equals hp. There are only two other numbers that are part of the formula and one is a constant.
and the other being??? Displacement...

I dont know the formula but i really doubt its just rpm displacement and a constant...There are so many other variables...right?

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Old 09-20-2012, 12:55 PM   #6
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Joined: Mar 2006
From: spokane, wa

I Ride: 2013 Gasgas 300xc w/lic plate + 1985 RZ350 + 2010 YZ250F +
Hp=rpm x lb/ft / 5252

That's it. Rpm times torque divided by 5252 equals hp.

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Old 09-20-2012, 12:58 PM   #7
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Joined: Mar 2006
From: spokane, wa

I Ride: 2013 Gasgas 300xc w/lic plate + 1985 RZ350 + 2010 YZ250F +
If you can increase rpm without sacrificing torque too much, or increase torque, you will have more hp.

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Old 09-20-2012, 01:01 PM   #8
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Joined: Mar 2012
From: Gig Harbor, WA
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I Ride: 2000 BRP (XR650R)
Learn something new everyday...thanks.

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Old 09-20-2012, 01:02 PM   #9
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Joined: May 2011
From: Vancouver,WA

I Ride: 2002 Aprilia Falco, 1991 CBR 1000F (sold), 1998 KX250, 2006 CRF250X
RPM will dictate HP only in the relationship of how fast you can generate RPM.
If HP is how fast an engine will make power and torque is how much work it will do, this applies. The only constant is the torque and horsepower will always cross paths at a 5250 rpm and HP will continue to rise and torque will drop (I suppose there may be a few exceptions to this rule as this formula is specific to piston driven engines).

From what I remember, Cosworth got an F1 engine to run a little over 20,000 RPM years ago but the issue was not mechanical but rater the inability to get any more air into the engine without forced induction. This means they have gotten air to travel at terminal velocity into the runners and it simply could not "pull" any more air in.

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Old 09-20-2012, 04:46 PM   #10
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Joined: Sep 2006
From: Beaverton
“ Quote:
Originally Posted by WaGigKPN View Post
I imagine other bikes will max out around there as well. In order to get the 20k+ RPM you need to have pneumatic valve "springs" IE, valves are pushed back by compressed air, not springs. I heard F1 car engines before all the rules were made were getting engine rpm's of close to 30k! (have not fact checked that, i am sure you can google it)
I believe the early Honda RC racers, like the RC149, revved to 20k back in 1966

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Old 09-20-2012, 06:28 PM   #11
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Joined: Mar 2006
From: spokane, wa

I Ride: 2013 Gasgas 300xc w/lic plate + 1985 RZ350 + 2010 YZ250F +


here is an RC166, 250 cc. I believe it rev'd over 21,000 rpm. the tach is marked at only 18k, but I am looking now for real info. the end of the video sends chills up my spine.

edit*- I guess it's merely 18 grand.

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Last edited by fastfoodfred; 09-20-2012 at 06:30 PM..
 
Old 09-20-2012, 06:32 PM   #12
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Joined: Aug 2011
From: Woodinville, WA

I Ride: Aprilia Futura
“ Quote:
Originally Posted by Reflexx View Post
to rise and torque will drop (I suppose there may be a few exceptions to this rule as this formula is specific to piston driven engines).
.
Uhhh, no. The formula is applicable to anything in rotary (as opposed to liner) motion.

It is the rotary version of: (force x distance) / time = power

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Old 09-20-2012, 06:35 PM   #13
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Joined: Mar 2006
From: spokane, wa

I Ride: 2013 Gasgas 300xc w/lic plate + 1985 RZ350 + 2010 YZ250F +
at 60 hp, this thing cranked out a whopping 17.5 lb/ft or ground pounding torque. its all about rpm! in other words, it could almost make a bolt finger tight.

torque is what flips your feet out from under you when you bend your pecker into the toilet with morning wood

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Old 09-20-2012, 07:09 PM   #14
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Joined: Aug 2005
From: Medford Oregon

I Ride: R-1
“ Quote:
Originally Posted by fastfoodfred View Post
My 06 r6 had a 17500 red line!

And rpm absolutely equals hp. There are only two other numbers that are part of the formula and one is a constant.
Those particular R6's actually redlined at 16,000 rpm. That redline was about 1500 RPM optimistic. here's the link to a roadracing world story from a few years back. http://www.roadracingworld.com/news/...?article=25009

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Old 09-20-2012, 07:20 PM   #15
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Joined: Aug 2010
From: Federal Way, WA

I Ride: in a vanpool
“ Quote:
Originally Posted by fastfoodfred View Post
torque is what flips your feet out from under you when you bend your pecker into the toilet with morning wood
Yes but with no RPMs... so no horsepower; only hosepower.

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Old 09-20-2012, 08:25 PM   #16
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Joined: May 2011
From: Everett. WA

I Ride: GS1150 Rat bike, NSR(G)500cc two stroke,CBR 900rr,98 Super chicken
That RC166 was a 6 cylinder 250cc's. Think about that for a second.
If I remember right it was like 10mm bore and 9 or 10mm stroke.
Oh yea, it was 4 valves per cylinder too. The valves looked like stick pins.
If you take a 1/4" drive 8 or 9mm socket that's about the size of the piston.

Yes rpm is everything. More RPM, more power strokes per minute.
RPM has a lot to do with flame front travel. How long does it take for the charge to burn from one side of the piston to the other. The bigger the bore, the longer it takes. Bigger bore = heavier parts = slower revving.
Tanker ships make huge amounts of power but only run at like 250-300 rpm with a 6' bore.

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Old 09-20-2012, 09:16 PM   #17
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Joined: Nov 2007
From: Southwest WA

I Ride: '82 Honda CB900F, '81 Yamaha XJ750R Seca, 1985 Honda VF1000R, 1980 Yamaha XS850 Special
I always loved the sound the RC166 made, just awesome. There isn't a idle circuit on the carbs for the RC166, probably why you will never hear one idle below 5,000 rpm. Fascinating.



The Honda NR500, although unsuceesful, it ran at 19,500 rpm in race tune for 81.

http://www.motorcyclespecs.co.za/mod...racer_1979.htm

But the '66 RC116 was 21,500 rpm putting out 16hp with 50cc's. Pretty incredible.

http://www.vf750fd.com/Joep_Kortekaas/1966.html#RC116

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Old 09-20-2012, 09:17 PM   #18
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Joined: Mar 2006
From: spokane, wa

I Ride: 2013 Gasgas 300xc w/lic plate + 1985 RZ350 + 2010 YZ250F +
“ Quote:
Originally Posted by DiveR-1 View Post
Those particular R6's actually redlined at 16,000 rpm. That redline was about 1500 RPM optimistic. here's the link to a roadracing world story from a few years back. http://www.roadracingworld.com/news/...?article=25009
Not true. Yamaha rules!

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Old 09-21-2012, 12:46 AM   #19
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Joined: Apr 2006
From: Arlington, Wa

I Ride: cuz your sister stopped putting out.
I believe the ZX2R revs to 20,000. Highest that I know if for a motorcycle.

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Old 09-21-2012, 01:05 AM   #20
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Joined: Sep 2008
From: where they don't have lawns.

I Ride: on the storm.
“ Quote:
Originally Posted by nsrg500 View Post
That RC166 was a 6 cylinder 250cc's. Think about that for a second.
If I remember right it was like 10mm bore and 9 or 10mm stroke.
Oh yea, it was 4 valves per cylinder too. The valves looked like stick pins.
If you take a 1/4" drive 8 or 9mm socket that's about the size of the piston.

Yes rpm is everything. More RPM, more power strokes per minute.
RPM has a lot to do with flame front travel. How long does it take for the charge to burn from one side of the piston to the other. The bigger the bore, the longer it takes. Bigger bore = heavier parts = slower revving.
Tanker ships make huge amounts of power but only run at like 250-300 rpm with a 6' bore.
Well maybe not quite that small, but...
Yakima
Just found this neat rc166 writeup.
http://www.returnofthecaferacers.com...honda-six.html
Exact specs are apparently more than a quick google search away.
Think about it though, 10mmx10mm x 6 cylinders won't get you to 249cc.
I so want one of those bikes.

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