infinitizx
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wickedzx14
Posts: 3
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posted June 26, 2009 03:33 PM
installed 16t front sprocket
I really like the improved accelleration , just wondering how much of my top speed did i lose ?
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smokinZX14
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posted June 26, 2009 03:43 PM
None ..It will still go close to limiter ....
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Smokin Performance Cycles..
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Gen 2 ZX14R Best ET 8.43 , Best MPH 164.95
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dubious
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posted June 26, 2009 03:45 PM
lost about 6%, so in total a stock bike with no speedo healer reads about 14% low.
When the speedo indicates 186, your actually limited to 160 mph.
get a speedo healer, have an accurate speedo and potential to see an actual 181 mph, vs ~174 stock
Yes thats correct, even with -1 on the frt sproket, removing the speed limiter and correcting the speedo will allow you to acheive an honest accurate increased top speed!
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infinitizx
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wickedzx14
Posts: 3
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posted June 26, 2009 04:05 PM
16t front sprocket
thanks for the input smokin and dubious, but i'm hoping smokin's answer is the right one cause thats a signifigant speed lost if your right dubious.
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Wheelie
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Old Man
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posted June 26, 2009 04:08 PM
my 16-48 calculated 161 mph
wee
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derpie
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posted June 26, 2009 04:39 PM
161 ? 1352 cc hmmmn doesn't add up I've been robbed. doesn't the busa put out more that that stock say the 2006 with 1298 cc ?
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KawaBonzai
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posted June 26, 2009 04:42 PM
quote:
161 ? 1352 cc hmmmn doesn't add up I've been robbed. doesn't the busa put out more that that stock say the 2006 with 1298 cc ?
sure it add's up. Stock gearing on a Zx-14 is 17/41. Going down -1 on the front will lower top end. going UP on the rear will lower top end.
So ... going -1 / +7 is getting near stunt gearing meaning reduced top end.
If all you are looking for is top end, gear the other way then.
thought this was basic knowledge, going back to 2nd grade with our BMX bikes ....
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dubious
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posted June 26, 2009 05:33 PM
 Edited By: dubious on 27 Jun 2009 01:33
Link:
http://www.gearingcommander.com/
The stock speedo is off by 8% , reading 7-8% high.
Stock the bike is actually running about 171 mph, not 186
186/174 = 1.08, so 8%
A change from 17 to 16 tooth equals 17/16= 1.0625
thats 6.025% change.
The speedo will be reading 14% lower than actual speed,
It will run into the speed limiter 6% lower than stock, which isa total of 14% lower than actual speed.
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Wheelie
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posted June 26, 2009 05:53 PM
so whats my top speed 16-48?
wee
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dubious
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posted June 26, 2009 06:16 PM
are you bypassing the limiter in any way?
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Wheelie
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posted June 26, 2009 06:26 PM
quote:
are you bypassing the limiter in any way?
ground down countershaft nut
wee
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dubious
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posted June 26, 2009 06:44 PM
LOL- I have been around here enough to know your ways! LOL
yup, that will bypass the speed limiter and allow you to rev another ~800 rpm in 6th
correct? Now it hits the rev, instead of speed limiter
speedo is off by about 25%, but no speed restriction.
The link I posted is really cool, because it already has the stock tire diameter, primary gear ratio for each gear, and the final ratio, it will allow you to adjust the max rpm in the calculator, and gears
select the model of the bike, and it presets everything, you need to adjust RPM though, and can select other options for gears too.
Wish I would have found it a long time ago...
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natural selection.....
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dubious
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posted June 26, 2009 06:47 PM
Also point of mention, I found that Brocks exhaust made enough power at the rev limiter, that it actually overcame some of it
I guess it was making enough power and had enough fuel that even with beginning of timing retarder, it was making enough to go a little further, about 150-200 rpm if I recall correct.
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natural selection.....
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Some are not worthy of the effort.
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dubious
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posted June 26, 2009 06:48 PM
Too Bad I can't copy an paste from their site to here...
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Wheelie
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Old Man
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posted June 26, 2009 07:16 PM
quote:
LOL- I have been around here enough to know your ways! LOL
yup, that will bypass the speed limiter and allow you to rev another ~800 rpm in 6th
correct? Now it hits the rev, instead of speed limiter
speedo is off by about 25%, but no speed restriction.
The link I posted is really cool, because it already has the stock tire diameter, primary gear ratio for each gear, and the final ratio, it will allow you to adjust the max rpm in the calculator, and gears
select the model of the bike, and it presets everything, you need to adjust RPM though, and can select other options for gears too.
Wish I would have found it a long time ago...
ive yet to hit the limiter in 6th, just curious if my calculations were close?
wee
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dubious
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posted June 26, 2009 08:10 PM
The calculator says the bike is mechanicaly capable of producing 161 MPH at 10,500 rpm in 6th gear with the stock tire dimensions and 16-48 gears
Are you wondering if there is a little bit more gear left in it?, maybe a 50 rear?
whats your 1/4 mile trap speed now?
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Rideharder
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posted June 26, 2009 08:42 PM
Edited By: Rideharder on 27 Jun 2009 04:48
Stock engine 16/41
On GPS 192.5
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Wheelie
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Old Man
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posted June 27, 2009 02:58 AM
quote:
The calculator says the bike is mechanicaly capable of producing 161 MPH at 10,500 rpm in 6th gear with the stock tire dimensions and 16-48 gears
Are you wondering if there is a little bit more gear left in it?, maybe a 50 rear?
whats your 1/4 mile trap speed now?
how did you know? lol . trap speed 146-150 depending on the temps.
wee
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dubious
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posted June 27, 2009 06:16 AM
Edited By: dubious on 27 Jun 2009 14:25
quote:
Stock engine 16/41
On GPS 192.5
Thats with nitrous I am sure, and I do KNOW personally from experience, the nitrous makes enough power even with the rpm limiter retarding timing, to over rev the limiter by 500 rpm.
Be carfeful doing that...the engine won't love you for long.
You must be defeating the rpm and speed limiter in some way, as 10,800 rpm is required wit the stock tire to acheive that at a real world 10,800 rpm, which is 300 actual rpm beyond the rev limiter, and would indicate approx 11,300 rpm on the tach.
That would not be stock engine then....
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natural selection.....
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Rideharder
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posted June 30, 2009 07:59 PM
quote:
quote:
Stock engine 16/41
On GPS 192.5
Thats with nitrous I am sure, and I do KNOW personally from experience, the nitrous makes enough power even with the rpm limiter retarding timing, to over rev the limiter by 500 rpm.
Be carfeful doing that...the engine won't love you for long.
You must be defeating the rpm and speed limiter in some way, as 10,800 rpm is required wit the stock tire to acheive that at a real world 10,800 rpm, which is 300 actual rpm beyond the rev limiter, and would indicate approx 11,300 rpm on the tach.
That would not be stock engine then....
Sorry dubious I missed this post..
It was without the nitrous.. there is a yellow box used on the zx14... I did receive the code to unlock the RPMs 500..
I will like to know your opinion on a 16/43?
Looking for the most pickup in third gear..
my weight 220 pounds
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freddie900
Expert Class
zx 14 2007
Posts: 152
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posted June 30, 2009 08:59 PM
what is this code you speak of?quote:
quote:
quote:
Stock engine 16/41
On GPS 192.5
Thats with nitrous I am sure, and I do KNOW personally from experience, the nitrous makes enough power even with the rpm limiter retarding timing, to over rev the limiter by 500 rpm.
Be carfeful doing that...the engine won't love you for long.
You must be defeating the rpm and speed limiter in some way, as 10,800 rpm is required wit the stock tire to acheive that at a real world 10,800 rpm, which is 300 actual rpm beyond the rev limiter, and would indicate approx 11,300 rpm on the tach.
That would not be stock engine then....
Sorry dubious I missed this post..
It was without the nitrous.. there is a yellow box used on the zx14... I did receive the code to unlock the RPMs 500..
I will like to know your opinion on a 16/43?
Looking for the most pickup in third gear..
my weight 220 pounds
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freddie900
Expert Class
zx 14 2007
Posts: 152
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posted June 30, 2009 09:00 PM
what is this code you speak of?
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Rideharder
Zone Head
Posts: 821
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posted June 30, 2009 10:02 PM
quote:
what is this code you speak of?
DynoJet Power Commander Ignition Module..
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