flyboy
Pro
Posts: 1536
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posted June 07, 2006 09:50 PM
Forget Drag Racing--
and think about top speed for moment. Suppose you wanted to be the fastest around (top speed)?
As someone who is ignorant to factory electronics am I to understand that with the custom exhaust, PC, nitro, changing sprockets, turbo charger, slaming... that the bike will only do 186 mph top end? And then once you add on a Yellow box or speedohearler one might pick up around 28 mph more? Is that the case? The ultimate top speed stops there?
What does one have to do to the 14 to have the top end in direct proportion with the horsepower? Is is possible? Besides streamlining and losing weight... what else could one do? Please educate me. Thank you.
____________
'There's more living in five minutes flat-out on a bike than some men have in an entire life'.
"The World's Fastest Indian"
One fast red ZX-14,
Three World and four National Land Speed Records,
One faster red and white Cessna Turbo 210
   
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dubious
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Needs more time to ride!
Posts: 8442
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posted June 07, 2006 11:30 PM
 Edited By: dubious on 8 Jun 2006 00:49
disconnect the speed sensor for a fast trip!
It will only work for a couple of miles till the ecm reads an error, then it will go into limp mode.
You will have to reconnect the speed sensor to clear the trouble code.
This will give you a temporary idea of its true top speed!
The speedo will not be working while the sensor is disconnected, but the tach will tell all, if you compared it to the rpm at indicated 186 mph!
There is a post in the zx12r zone on this site and dan has had i t WFO at the maxton mile!
he's pulled some incredible #'s that are verified true speeds!.... stock!
http://www.bikeland.org/board/viewthread.php?FID=1&TID=23844&set_time=
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BobC
Pro
Posts: 1736
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posted June 08, 2006 01:39 AM
With the 18 tooth sprocket installed they were doing around 9800rpm for 196mph at Maxton.
For top speed, ignoring quarters, the answer seems to be to alter the gearing so that peak power coincides with the maximum achievable speed with the available horsepower.
For example if you need 200bhp to do 200mph (hypothetically) you set the gearing so that 200 in top gear equals peak power rpm.
Sounds too easy and it is. There are lots more variables which screw the theory, as we all know.
____________
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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Nukedog
Expert Class
Posts: 449
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posted June 08, 2006 06:02 AM
"With the 18 tooth sprocket installed they were doing around 9800rpm for 196mph at Maxton."
So with a 17 they may actually have pulled redline in 6th and went faster...
____________
02 Busa...Turbo...
09 YZF-R6S...
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TheVak
Expert Class
Posts: 274
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posted June 08, 2006 06:31 AM
I own a Blue 14 but freaked when I saw a 260Mph pass on a turbo
Busa. I have to say that if it wasn't for the Busa (wether I like it or not)
we probably would'nt have the 14. But I will admitt we will be hard
pressed ($ as well) to match a 260Mph pass...................... I will be
waiting for the first High Speed Turbo 14 to show up on the seen.
But it will take allot more then just some boost to match that. Article
is in some european mag......................................
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dubious
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Posts: 8442
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posted June 08, 2006 06:36 AM
Edited By: dubious on 8 Jun 2006 07:41
No Nuke,
the stock power curve tapers down before redline, so less power available at redline with stock gears, than 9500-9800 RPM with 18.
Put Brocks pipe on there and the curve keeps climbing right to redline... another 25 HP with pipe and MR9, pull air filter and another 4 HP in there too.
It would likely pull about 204 mph with his pipe and the 18 tooth!
Stock vs pipe pc3 and tuning:
Stock vs pipe, pc3 tune, MR9 and air filter out:
____________
natural selection.....
destiny will overcome intervention.
Some are not worthy of the effort.
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Mano 2
Expert Class
Posts: 360
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posted June 08, 2006 06:49 AM
Power peak is at 10,500rpm,correct?
If stock gearing 17/41 is for 208 [per Bob C] @11,000rpm the 10,500=198, perfect?
An 18 tooth would be 10,500 = 210mph. Not perfect. 198 would be 10,000rpm.
If stock gearing is 202 [magazines] @11,000rpm, then 18 tooth would be almost perfect 10,250 = 202mph.
Bob C said he verified his calcs and reposted. I have not done the math.
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dubious
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posted June 08, 2006 06:57 AM
Edited By: dubious on 8 Jun 2006 08:03
Look at the graphs, stock powewr peaks at 9500-9800 RPM, then tapers.
Modded peaks at 10,000.
Look at teh high points, not the markers
The markers are to compare largest gains with mods.
Totaly stock you want it geared for peak power, and will keep geraing it till top speed starts to drop off, because its geared too tall to pull peak power rpm, or if its geared too low(stock gears) it over revs past the peak an d therefor is not pulling its potential speed!
Dan did the right thing for a stock motor, and in fact, with a pipe probably the right thing too, as it has the balls to pull more rpm, and more power with more rpm to pull taller gearing!
These guys have been doing the Maxton thing for years ... they have it figured out!
____________
natural selection.....
destiny will overcome intervention.
Some are not worthy of the effort.
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Mano 2
Expert Class
Posts: 360
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posted June 08, 2006 07:01 AM
Then even stock gearing is way too tall right?
Unless stock is 202 @11,000rpm.
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dubious
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Needs more time to ride!
Posts: 8442
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posted June 08, 2006 07:04 AM
i edited the last post.
It explains !
____________
natural selection.....
destiny will overcome intervention.
Some are not worthy of the effort.
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dubious
Needs a life
Needs more time to ride!
Posts: 8442
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posted June 08, 2006 07:16 AM
The reason i said about 204 mph with 18 tooth, even though in theory, it shoul make 220! at 11,000 is coefficient of drag increases exponentialy with speed,
If it took 170 rwhp to pull 196, it might take 200 rwhp to pull 208 with the same bike.
____________
natural selection.....
destiny will overcome intervention.
Some are not worthy of the effort.
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