riaansh
Expert Class
Posts: 195
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posted January 13, 2007 05:28 AM
How Fast
Guys I did a top end run on a quite rd today. I'm impressed with this 14. I did not have a gps on hand but the bike revved to 11100 revs in top gear. How fast do you think that was?
Only mods is Brock's street/meg.
Top end derestricter from a local developer. I haven't fitted the power commander yet.
  
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phytrax
Zone Head
Posts: 526
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posted January 13, 2007 06:03 AM
 Edited By: phytrax on 13 Jan 2007 06:04
Should have looked at the speedo instead of the rpm. Your speedo is probably off from the derestrictor though (speedohealer?) See what your speed is at 5500 rpm in 6th and multiply by 2. What kind of derestricter do you have on it? Your speedo should have been around 215-220 at 11,000, which would put your actual speed right around 200 mph. You could get a little more accurate number with a good 5500rpm speed, but the best way is to use a gps.
____________
Concourse14- Corbin Seat, Candy Apple Red Paint, Area P Slip-On
RIP+ZX-14- Brock's Gen3, Heli Risers, Corbin Bags, Corbin Seat and Oval Backrest (Burgandy Snakeskin and black alligator), Muzzys Frame Sliders, flies out, 18t front sprocket, PC3, Puig Double Bubble, Pirelli Diablo Strada's
KX450F - kickstand
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riaansh
Expert Class
Posts: 195
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posted January 13, 2007 06:31 AM
Edited By: riaansh on 13 Jan 2007 06:33
quote:
Should have looked at the speedo instead of the rpm. Your speedo is probably off from the derestrictor though (speedohealer?) See what your speed is at 5500 rpm in 6th and multiply by 2. What kind of derestricter do you have on it? Your speedo should have been around 215-220 at 11,000, which would put your actual speed right around 200 mph. You could get a little more accurate number with a good 5500rpm speed, but the best way is to use a gps.
The derestricter also works from the gps[bike] I think you call it. This is a local developed derestricter that leaves the speedo standard. It does not affect the speedo like the speedo-healer. To sum it up then. This derestricter cancels the 300 km/h restriction. My local dealer said this development is endorsed by kawasaki SA. I will try and find out from them who is selling the product if anyone else is maybe interested. O yes and it felt like the bike would still go faster when I slowed down. I will take a GPS next time to make sure of the speed.
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kspz3
Expert Class
Posts: 334
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posted January 13, 2007 08:46 AM
In general - a 14 with stock gearing will go about 200MPH when the rev limiter kicks in (assuming bypassing the speed limiter of course) - which would be around 11,500 indicated (11,000 actual), - This of course varies with tire wear........ my guess is at 11,100 indicated actual speed would be between 192 and 193. Hopefully only ever done on a track.......
KSP
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kspz3
Expert Class
Posts: 334
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posted January 13, 2007 08:54 AM
Edited By: kspz3 on 13 Jan 2007 08:54
edited repeat....
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worm~hole
Needs a life
Miles to go before I sleep....
Posts: 10623
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posted January 13, 2007 01:39 PM
...you went two meeeeeeeeeeeeeeee-leon miles an hour!!!!!.... 
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stand ready in the night to visit violence on those
who would do us harm.”
-George Orwell
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Mano 2
Expert Class
Posts: 360
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posted January 13, 2007 03:16 PM
All posts I've seen agree tach is about 250rpm over.
11,000 is 10750rpm actual
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BlackMagic14
Needs a job
Posts: 2058
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posted January 14, 2007 08:33 PM
I would say at most 190 depending on your weight 200 is a lot tougher to get then most people think
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phytrax
Zone Head
Posts: 526
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posted January 15, 2007 05:56 AM
Stock bike is limited at 186 mph, which shows as 200-204 on the speedo. If you had the speedo on 200 mph the actual speed would be about 184 mph. Speedo is usually 8% off.
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Concourse14- Corbin Seat, Candy Apple Red Paint, Area P Slip-On
RIP+ZX-14- Brock's Gen3, Heli Risers, Corbin Bags, Corbin Seat and Oval Backrest (Burgandy Snakeskin and black alligator), Muzzys Frame Sliders, flies out, 18t front sprocket, PC3, Puig Double Bubble, Pirelli Diablo Strada's
KX450F - kickstand
>>> MySpace --CLICK-- <<<
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BobC
Pro
Posts: 1736
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posted January 15, 2007 07:23 AM
Edited By: BobC on 15 Jan 2007 07:37
I like this thread and here's my take on it.
The tachometer is optimistic too, just ask anyone who's seen their bike on a dyno'. It's around 7 to 8% over. Just like the speedo actually.
That means you were probably revving to 10300, not 11100. On standard gearing that gives a true 194.8mph. and your speedo would be reading around 208mph if it could. However if you still had the engine speed limiter working ?????? The other explanation might be clutch slip.
On stock gearing 200mph is 10573rpm. Ignoring any on-bike instruments, this is worked out on a spread sheet with correct ratios etc. Also I have found that the engine rev limiter cuts in at a true 10800rpm. When I did my 205mph run the tacho was reading around 11100 but the real rpm at this speed on 18/41 gearing is 10255.
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Candy Thunder Blue 2006 ZZR1400
Stock wheelbase
Max: 205.4 mph in 1.25 miles
2012 ZZR1400 in Golden Blazed Green
Brock CT Full System. etc
Max: 203.1 in 1 mile (so far)
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kspz3
Expert Class
Posts: 334
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posted January 15, 2007 05:51 PM
Bob,
I think your numbers are wrong - Dyno numbers should have rev limiter kicking in @ 10,800 with hard stop at 11,000. Tach should be reading in the 11,300 to 11,500 range in that same period. If you notice Brock's data at Maxton he was clipping the rev limiter @ 200MPH - and slowing down - reading were off of his data capture hardware - not sight. His tires had a good bit of wear - I think when I did calcs I was estimating another couple MPH on new rubber. I could cross check with my numbers later - I had mine catching the rev limiter in 5th around 196 - and turning on the shift light @10,400 at 184.xx MPH.... I had pretty new tires and with 18/40 gearing. Speeds were based on trap speeds at Maxton and my best estimates based upon relative correlation..... the numbers should be close. KSP
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BobC
Pro
Posts: 1736
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posted January 15, 2007 11:01 PM
Edited By: BobC on 16 Jan 2007 00:30
Don't forget I was running 18/41 gearing ( 200mph = 10000rpm, work it out from the crank speed, internal gearbox ratio in 6th, final drive and wheel circumference). The numbers I gave were observations based on my experience with the exception of the speed which was electronically measured through a speed trap. The spreadsheet I use for "real" speed/rpm/gearing is accurate. I'm not just theorising, that's the way it was.
Cheers,
Bob.
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kspz3
Expert Class
Posts: 334
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posted January 16, 2007 06:17 AM
Bob,
Could what is your calculation for top speed in 6th gear with 18/41? BTW - I an just trying to compare notes........ I will check mine later give you mine.
KSP
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sj1400
Novice Class
Posts: 96
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posted January 16, 2007 06:21 AM
With stock gearing are you guys reaching top speed in 5th or 6th ? This past season I noticed I was able to run people down by leaving her in 5th. The downside was she was pulling a lot of revs for a short period. Using 6th gear felt like the bike was on the governor.
Was hoping the speedo healer could get me more mph out of 6th gear.
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riaansh
Expert Class
Posts: 195
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posted January 16, 2007 09:30 AM
Edited By: riaansh on 16 Jan 2007 10:03
quote:
I like this thread and here's my take on it.
The tachometer is optimistic too, just ask anyone who's seen their bike on a dyno'. It's around 7 to 8% over. Just like the speedo actually.
That means you were probably revving to 10300, not 11100. On standard gearing that gives a true 194.8mph. and your speedo would be reading around 208mph if it could. However if you still had the engine speed limiter working ?????? The other explanation might be clutch slip.
On stock gearing 200mph is 10573rpm. Ignoring any on-bike instruments, this is worked out on a spread sheet with correct ratios etc. Also I have found that the engine rev limiter cuts in at a true 10800rpm. When I did my 205mph run the tacho was reading around 11100 but the real rpm at this speed on 18/41 gearing is 10255.
Hi Bop, I think i have to agree that the tacho must be off.
I don't exactly know what this derestricter is doing. My experience through the gears was that it revved easily to at least 11500 when i was testing it. So, maybe this thing also did something with the limiter. I realy dont know. It is a company called Club House motorcycles that developed this thing. Previously my bike would not rev more than 10 000 revs give and take a few. I will in the near future do a GPS run to clarify the top speed. I realise that it is not 200 mph, but it is way over the normal limit at least.
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blackbullet76
Pro
Posts: 1134
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posted January 16, 2007 12:08 PM
I hope I get the balls to reach the full potential of my 14. I've only hit 140 (indicated) so far. For some reason, it's seems I'm moving faster than on my old bike (01 zx6r) and I've hit 150 (indicated)on it. Both bikes with stock gearing.
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riaansh
Expert Class
Posts: 195
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posted January 16, 2007 12:56 PM
quote:
I hope I get the balls to reach the full potential of my 14. I've only hit 140 (indicated) so far. For some reason, it's seems I'm moving faster than on my old bike (01 zx6r) and I've hit 150 (indicated)on it. Both bikes with stock gearing.
Look for a very quiet road and open it up. It's like magic to go fast. After a few times fast is not so fast anymore. I think to stop would always be a problem when you are up there. So, have enough open road. The 14 is very stable at high speed.
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BobC
Pro
Posts: 1736
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posted January 16, 2007 01:49 PM
Edited By: BobC on 16 Jan 2007 13:59
quote:
Bob,
Could what is your calculation for top speed in 6th gear with 18/41? BTW - I an just trying to compare notes........ I will check mine later give you mine.
KSP
This is my calculation, (you didn't state at what rpm) but you can work it out from this :
10000rpm in 6th on 18/41 is 200.305mph ( around 20mph per thousand rpm )
10800rpm in 6th on 18/41 is 216.33mph ( 10800 is when I think limiter cuts in )
18/41 is going to be overgeared for top speed on a ZX-14 with "normal" bhp unless the conditions and track length are absolutely ideal. I was lucky when I did my 205 it was with a tail wind on a 2 mile runway, including stopping. A huge gamble that paid off. I think 17/40 would be more sensible, 10300 on 17/40 would give 199.7mph. Try to gear so that the speed you are aiming for coincides with peak power.
Hope this is useful.
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kspz3
Expert Class
Posts: 334
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posted January 16, 2007 04:53 PM
I was talking about at Rev limiter. First I believe based upon dyno numbers and graphs that I have seen that the rev limiter is at 11,000 and that it reads 11,500 on the tach. I think that you are in the ball park on speed when you hit the rev limiter - depending upon tire wear. My calculations say that top speed will vary by approx 4% for 1/4" differance in tire wear - which is substantial in actual speeds achieved.
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kspz3
Expert Class
Posts: 334
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posted January 16, 2007 05:34 PM
Bob,
I chose 18/40 for 2 reasons - first I was not using a speedo healer and therefore the gearing ratio could cary me to 201MPH prior to hitting the 186MPH built in 6th gear limiter - as the new gear ratio is not recognized by the speed sensor. Second - for Bonneville I was looking for Headroom in the event of tire spin and based upon my calculations the top speed would be about 220MPH - resulting in 10% headroom (200MPH is my goal). Third - I believe that peak horsepower in the 10,200 - 10,300 are and therefore the optimal point to achieve terminal velocity - again my calculations put that at 206 with 18/40 gearing. So that is the reasons for my gearing set-up. Now some would debate that at Maxton - it is a one mile drag race basically with untreated start line - that lower ratio would increase acceleration - but from my perspective with the chosen gearing I still need throttle control as it will either loft the front end or break the tire loose in first gear - therefore lower gearing - resulting in increased torque is not of any value as I am traction limited in how much torque can be delivered. I have had a number of experieinced folks tell me that I would be better off with lower gearing - but I am still sticking o my plan. Brock landed up with 17/40 gearing...... as 18/41 had him into the limiter at 200.
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vegasdude
Zone Head
Posts: 821
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posted January 16, 2007 10:56 PM
with speedohealer installed
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BobC
Pro
Posts: 1736
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posted January 17, 2007 02:46 AM
Edited By: BobC on 17 Jan 2007 03:58
Nice image of your speedo Vegas dude. Did you know that with the Speedo Healer set to the "convert kph to mph" mode your mph speedo steps down to the inner scale and becomes a 280mph speedo?
That's the mode I use for speed events, just leave it in transparent mode for the road.
kspz3, 18/40 gearing will give 200mph at around 9750rpm, that's short of peak power and you'd need around 215 rwbhp to pull that gearing to the max. Best option is to take a selection of sprockets and rear chainwheels and select whichever ratio suits the conditions. That's if you're really serious about getting the maximum speed. Good luck, let us know how you do.
Regards,
Bob.
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RICH CRAFT 1
Zone Head
Posts: 681
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posted January 17, 2007 10:10 AM
17-41= 3.85 gear ratio. tire circ 76.5=207MPH@11000 . 18-41=3.63 gear ratio=219MPH @11000 RPM.19-41=3.44 gear ratio=231MPH @ 11000RPM. You can obtain the 11,000
RPM by grinding off 1 corner of the 4 corners on the front nut this reduces the speed by 25%,
for example at 200 MPH your speedo would show 150 MPH. I have tried this and it works.
Extra nut $22.00.
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Vegasdude
Zone Head
Posts: 821
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posted January 17, 2007 11:03 AM
quote:
Nice image of your speedo Vegas dude. Did you know that with the Speedo Healer set to the "convert kph to mph" mode your mph speedo steps down to the inner scale and becomes a 280mph speedo?
That's the mode I use for speed events, just leave it in transparent mode for the road.
kspz3, 18/40 gearing will give 200mph at around 9750rpm, that's short of peak power and you'd need around 215 rwbhp to pull that gearing to the max. Best option is to take a selection of sprockets and rear chainwheels and select whichever ratio suits the conditions. That's if you're really serious about getting the maximum speed. Good luck, let us know how you do.
Regards,
Bob.
Hey that's go to know thanks..........!!
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famous1
Expert Class
Posts: 402
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posted January 17, 2007 11:25 AM
quote:
17-41= 3.85 gear ratio. tire circ 76.5=207MPH@11000 . 18-41=3.63 gear ratio=219MPH @11000 RPM.19-41=3.44 gear ratio=231MPH @ 11000RPM. You can obtain the 11,000
RPM by grinding off 1 corner of the 4 corners on the front nut this reduces the speed by 25%,
for example at 200 MPH your speedo would show 150 MPH. I have tried this and it works.
Extra nut $22.00.
wow...... this guy is sharp..... firdt the flies, now this.... what else you got rich?
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