SV650.org - SV650 & Gladius 650 Forum



SV Talk, Tuning & Tweaking Discussion and chat on all topics and technical stuff related to the SV650 and SV1000
Need Help: Try Searching before posting

Reply
 
Thread Tools
Old 11-06-07, 12:01 AM   #11
northwind
Moderator
Mega Poster
 
northwind's Avatar
 
Join Date: Jan 2004
Location: In the garage where I belong
Posts: 17,083
Default Re: maxing out

There's always something faster... The faired SV's a little overgeared IMO, you're not the first to find they can't rev it out. Mine has something like 15-20bhp more than stock once you get near the redline (it makes around 80 at peak compared to 68 or so standard, but also doesn't fall off after peak as hard as stock does), and it still takes a fair old time to reach the limiter with the standard gearing. The actual difference in speed isn't huge though.

Another thing to note is that hitting the limiter in top is quite alarming when it happens, I can't recommend it I thought I'd blown it up
__________________
"We are the angry mob,
we read the papers every day
We like what we like, we hate what we hate
But we're oh so easily swayed"
northwind is offline   Reply With Quote
Old 11-06-07, 12:29 AM   #12
monkey
Guest
 
Posts: n/a
Default Re: maxing out

I've got a K3 and hit the rev limiter at an indicated 133. I was so tucked in you couldn't imagine-almost part of the bike. Believe it or not it was the first time I'd hit the limiter! I don't make a habit of it.

I wouldn't worry about the 9000 rev thing-the wind was probably against you or something. Do you eat a lot of pies?

As far as outgrowing the SV, well I doubt you have, especially considering you only passed your test IN APRIL! DOH! (See first post)

  Reply With Quote
Old 11-06-07, 12:30 AM   #13
monkey
Guest
 
Posts: n/a
Default Re: maxing out

Quote:
Originally Posted by northwind View Post
Another thing to note is that hitting the limiter in top is quite alarming when it happens, I can't recommend it I thought I'd blown it up
He he. I did write something like that in my post but deleted it. Something went poop poop when I done it and it wasn't the bike!

  Reply With Quote
Old 11-06-07, 08:43 AM   #14
jon8oy
Guest
 
Posts: n/a
Default Re: maxing out

Thanks for all the comments...
  Reply With Quote
Old 11-06-07, 08:48 AM   #15
jon8oy
Guest
 
Posts: n/a
Default Re: maxing out

Quote:
As far as outgrowing the SV, well I doubt you have, especially considering you only passed your test IN APRIL! DOH!
Yes i know i only passed my test in april but have been riding bikes for 15 years and its not a case of out growing the bike....
  Reply With Quote
Old 11-06-07, 09:11 AM   #16
Jelster
Guest
 
Posts: n/a
Default Re: maxing out

Gear it down... You're basically in "overdrive" when in top so will never hit the limiter. Some say they can go faster in 5th than 6th...

Up one on the front and/or 3 on the front, then you'll probably be able to get closer to it.

.
  Reply With Quote
Old 11-06-07, 12:30 PM   #17
CSpronken
Member
 
CSpronken's Avatar
 
Join Date: May 2007
Posts: 113
Default Re: maxing out

Quote:
Originally Posted by 2mths View Post
The wind resistance is proportional to the square of your speed, so getting another mph requires a a chunk more power (or less resistance). I don't see when you could expect to use this additional speed anyway.
In fact wind resistance increase to the power 3 of speed, but because you obviously also cover more distance per second fuel consumption expressed per distance only increases as the square of the speed (more or less).

Quote:
Originally Posted by gettin2dizzy View Post
My bike does 120 at 9000 in 6th. You got standard gearing?
Perhaps he's got a 16 front sprocket? Are you the first owner of the bike? EDIT: BTW If that's 120 mph on the dash, that would be about 112 mph and then little over 9000 would be quite normal, so then it might be a power issue or perhaps circumstances like headwind or slight slope.

Quote:
Originally Posted by Jelster View Post
Gear it down... You're basically in "overdrive" when in top so will never hit the limiter. Some say they can go faster in 5th than 6th...
My curvy's 6th certainly is no overdrive, I pass max. power revolutions before reaching top speed (although power does not decrease much passed 9000 RPM on most powercurves I've seen).
__________________
'02 (Curvy), yellow, Sport Smart, mods: progressive fork springs, '03-04 ZX-6RR rear shock, Li-ion battery, Leovince slip-on, Powerbronze airflow double bubble, flush front indicators, bike-it integrated LED rear. SRAD front end conversion on going.

Last edited by CSpronken; 11-06-07 at 12:51 PM.
CSpronken is offline   Reply With Quote
Old 11-06-07, 12:35 PM   #18
2mths
Guest
 
Posts: n/a
Default Re: maxing out

Quote:
Originally Posted by CSpronken View Post
In fact wind resistance increase to the power 3 of speed, but because you obviously also cover more distance per second fuel consumption expressed per distance only increases as the square of the speed (more or less).
Sorry but I think you're talking sh1te there.

Drag force = (d * V^2 * Cx * S) / 2

Where:
d = air density
V = velocity
Cx = Drag coefficient
S = Frontal surface area

or http://en.wikipedia.org/wiki/Drag_%28physics%29
  Reply With Quote
Old 11-06-07, 12:47 PM   #19
CSpronken
Member
 
CSpronken's Avatar
 
Join Date: May 2007
Posts: 113
Default Re: maxing out

Quote:
Originally Posted by 2mths View Post
Sorry but I think you're talking sh1te there.

Drag force = (d * V^2 * Cx * S) / 2

Where:
d = air density
V = velocity
Cx = Drag coefficient
S = Frontal surface area

or http://en.wikipedia.org/wiki/Drag_%28physics%29
Well we are are both wrong, but still you need engine power to the power of 3, look one chapter down on that same wikipedia page:

Power

The power required to overcome the aerodynamic drag is given by:
Note that the power needed to push an object through a fluid increases as the cube of the velocity. A car cruising on a highway at 50 mph (80 km/h) may require only 10 horsepower (7.5 kW) to overcome air drag, but that same car at 100 mph (160 km/h) requires 80 hp (60 kW). With a doubling of speed the drag (force) quadruples per the formula. Exerting four times the force over a fixed distance produces four times as much work. At twice the speed the work (resulting in displacement over a fixed distance) is done twice as fast. Since power is the rate of doing work, four times a work in half the time requires eight times the power.
It should be emphasized here that the drag equation is an approximation, and does not necessarily give a close approximation in every instance. Thus one should be careful when making assumptions using these equations.
__________________
'02 (Curvy), yellow, Sport Smart, mods: progressive fork springs, '03-04 ZX-6RR rear shock, Li-ion battery, Leovince slip-on, Powerbronze airflow double bubble, flush front indicators, bike-it integrated LED rear. SRAD front end conversion on going.
CSpronken is offline   Reply With Quote
Old 11-06-07, 01:06 PM   #20
2mths
Guest
 
Posts: n/a
Default Re: maxing out

I don't think anything I said was actually wrong (though if I'd gone on to say more it probably would have been). So in the spirit of things...

I'll offer you a draw?
  Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 02:18 AM.


Powered by vBulletin® - Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.