Sticks_n_Stones
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posted September 20, 2007 08:30 AM
 Edited By: Sticks_n_Stones on 20 Sep 2007 09:32
couple things: road race tires and drag tires both are designed to "grow" as the rpms of the tire increase. This growth can be quite large and help in the gearing department. However, a soft compound also absorbs a significant amount of power, especially at higher speeds. So you will find it to be a "slower" tire unless you have the power to overcome this and utilize those tires "growth" at high speeds.
Do not forget, You are creating alot of heat at those high speeds and if your tire is under-inflated AT ALL you are going to either find the tire shredding or you'll 'cook' the oils out of it, hardening it for good. The closer to a full race tire you get, the better able to handle and dissipate the heat it gets. Compromise with a Pilot Power IMO.
BTW: you guys mention running specific speeds, I must assume you are using GPS to measure it??? what unit are you guys using, and how did you mount it? I plan on having a camera running for my runs, and want it to see the GPS and road, gauges are a +. Any ideas?
  
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Stage XXX Mr Turbo ZX14
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posted September 20, 2007 09:33 AM
Bob / Sticks
Thanks for the good advice, are you guys going to the texas mile?
XXX
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BobC
Pro
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posted September 20, 2007 10:21 AM
Edited By: BobC on 20 Sep 2007 11:23
Sticks,
I don't entirely agree with what you say. It was true that tires grew with rpm some years ago but modern construction has almost entirely overcome that. I'm talking standard road rubber, not specialist drag racing products. The speed at our meetings is measured through two beams a set distance apart and is accurate to one tenth of a mph, these are professionally run meetings on an airfield runway. I remember a few years ago a guy from Avon in the UK explaining that when they say their product is safe to a certain speed with a given loading, that means they run it on a test rig for 24 hours and if it fails it's back to the drawing board. The margins for safety are considerable but we are pushing the envelope at 200mph plus so we have to use the best product we can buy and not take chances. Safe riding.
I'd love to do the Texas mile but it's a bit of a journey from England. One day maybe.....
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Sticks_n_Stones
Needs a job
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posted September 20, 2007 10:50 AM
I JUST read an article where they tested a bunch of tires and mentioned it. As a matter of fact, they were unable to fully test the Dunlop 208GP's because over 100mph they rubbed on the swingarm! The article clearly states that all tires do it, race tires just more so. common sense, really. question is how much? On the 208GP's the answer at 100mph is over 4mm, which is the gap it had at rest. Here is the SuperBike Magazine article:
http://www.zinio.com/express?issue=77606059
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RyuNinja14
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Posts: 142
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posted September 20, 2007 05:45 PM
quote:
MR turbo. did the run on a highway here on a sunday morning at seven açlock in the morning.... my front sprocket was 17, standard.. You wrote about about the zx11 mr turbo, I did read that ten years ago, and you are right about those numbers, I think it was in performance bikes. it was a blue white zx11... it was water injected cooled, and they blew the engine in those testruns.
I think it was in cycle world they had that monster Mr. Turbo ZX-11 featured. Bike made well over 400rwhp making a dodge viper look funny in terms of power. Top speed was 234mph and would have been higher since the bike was still pulling. But the front tire was dancing so much they didn't push it any furthur. It was some yearly thing cycle world did for awhile called "UFO" where they'd have atleast 4 different built bikes just for the purpose of seeing how insanely fast they could go in the straight line. Last year they had it i think Mr. turbo showed up with a blackbird but the motor caved in before any top end runs could be done. However i don't think the zx-11's 234mph speed was ever surpassed in these events, which ended after only a few years.
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Stage XXX Mr Turbo ZX14
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posted September 20, 2007 06:44 PM
Ryu,
the bike made like 494hp over 10 years ago, talk about being ahead of its time. some builders would give a left nut to have anywhere near that now. i can tell you first hand Mr. Turbo is the man. The zx14 bike we are building is well up into the 400's hp and 230+ lbs of torque and that is only at 20lbs of boost. we have 30 to 35 lbs potential. runs perfect and is very streetable. not to mention fully chromed out top to bottom , all plastics etc chromed by XXX Chrome Plating, WI . the bike should be fully completed by the last prostar in FL in nov. but i am hoping to run it at the Texas Mile with member TG.
XXX
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tg1820
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posted September 20, 2007 06:51 PM
I may just be watching with all the power the Stage III is making I just want to see that thing take off! It is truly amazing what Terry is capable of!!!
TG1820
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RyuNinja14
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Posts: 142
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posted September 20, 2007 10:44 PM
Edited By: RyuNinja14 on 20 Sep 2007 23:46
Hope you can make it to texas and do well! Good luck and keep us posted! 
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Sticks_n_Stones
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posted September 21, 2007 05:13 AM
Hey fellas, how about some onboard video of the runs??? Probably has to be onboard, I would imagine any outside camera would just show one helluva fast blur of reflected light off all that chrome going by at 200+!
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BobC
Pro
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posted September 21, 2007 05:26 AM
Edited By: BobC on 21 Sep 2007 07:02
quote:
I JUST read an article where they tested a bunch of tires and mentioned it. As a matter of fact, they were unable to fully test the Dunlop 208GP's because over 100mph they rubbed on the swingarm! The article clearly states that all tires do it, race tires just more so. common sense, really. question is how much? On the 208GP's the answer at 100mph is over 4mm, which is the gap it had at rest. Here is the SuperBike Magazine article:
http://www.zinio.com/express?issue=77606059
Thanks for the link, an interesting article. They do say, as you point out, that race tires grow more centrifugally than road and the D208GP they had problems with is not a road tire. The zero degree steel belted technology, such as that used by Pirelli and Metzeler, is to prevent growth. Take the Metzeler Dragtec for example. I'd like to get some definitive data for the BT014, maybe I'll use a laser level to measure it next time my bikes on the dyno.
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Stage XXX Mr Turbo ZX14
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posted September 21, 2007 10:44 AM
After a few days of research into tires, I think i am going with the pilot race med compound. that is what a few world record holders are using, and i can argue with that.
also does anyone know of the biggest front sprocket availble and the smallest rear?
thanks
XXX
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kspz3
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posted September 21, 2007 10:49 AM
I have 18x38 - vortex i believe - I use Battleax with race/street compound - hich has worked well.... jody and trillian are using the same and are pleased on their turbo set-up Busa at maxton.
KSP
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kspz3
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posted September 21, 2007 10:50 AM
I am assuming that you are planning to run on a track......
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iflyems
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posted September 21, 2007 11:16 AM
With his setup he's gonna have to run 18/38, or 40 gearing. 17t is really too small for a high horsepower turbo bike. You don't want the chain getting damaged, and you need the lower gearing to launch and race the bike, and it also raises the chain up off the swingarm.
I'll be going to an 18tooth front when I get around to ordering one.
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smokinzx14
Needs a life
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posted September 21, 2007 11:35 AM
quote:
With his setup he's gonna have to run 18/38, or 40 gearing. 17t is really too small for a high horsepower turbo bike. You don't want the chain getting damaged, and you need the lower gearing to launch and race the bike, and it also raises the chain up off the swingarm.
I'll be going to an 18tooth front when I get around to ordering one.
I have an 18 tooth off my zrx1200 ..Brand new in the package . I think it's the same for a zx1400 ..You want ??
____________
Smokin Performance Cycles..
Tampa Bay , FL .. Brocks Performance Dealer ..
Gen 2 ZX14R Best ET 8.43 , Best MPH 164.95
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Stage XXX Mr Turbo ZX14
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posted September 21, 2007 05:21 PM
Update on gearing
we have decided to have some custom gears made for it. (19 and 20 front) and somewhere between (30 and 38 rear) Mr. Turbo is working some gear charts right now based off of everything from tire dia. to crank speed, engine speed. and about 10 other variables, he has it down to how many inchs per rpm !!! he is way over my head with that stuff. but i will trust him he has been 260+mph on the budwiser busa he built for Ron Yancy. we really want to run some top end speed, then it is off to run prostar in Nov. to run super street. thanks for your input
XXX
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Halvefast
Zone Head
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posted September 21, 2007 09:29 PM
Here this will help you, I'm sure Terry has it all worked out with his own formula.
But you can play with gearing tire sizes, RPM's, it helped me out alot.
Link: http://www.xs4all.nl/~ator0437/gc/
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Stage XXX Mr Turbo ZX14
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posted September 21, 2007 09:43 PM
thanks --- very cool -- and usefull
XXX
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LandspeedLarry
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posted September 22, 2007 07:21 AM
Stage XXX get your facts straight. Rich Yancy built his Bud bike. He used a Mr Turbo kit but modified it so extensively that it is really a Yancy kit. Terry Kizer went 239 MPH on it at Texas while Rich (6' 8" tall) went 245 and Scott Guthrie (age 60) went 251 that same weekend. The bike has run 260 at Maxton, N.C. with Lee Shierts riding, A real accomplishment.
200 is pre-school in LSR. The stock tire is more than adequate. The best tire made for LSR is the Michelin Pilot Sport HPX. It might be too hard for short acceleration tracks so try something like a BT002 or equivalent. LSL
____________
Home of the World's Fastest Naturally Aspirated motorcycles.
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Stage XXX Mr Turbo ZX14
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posted September 22, 2007 08:02 AM
Larry,
All i am tring to convey is that he had been there, part of projects that have set lots of records. you dont become a 9 time national champ for nothing. he knows his stuff. As far as tires go, I have heard nothing but good things about those pilots and that is more then likly what i will get. Larry - what kind of bike to you run and how fast have you been. are you coing to Texas?
XXX
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LandspeedLarry
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posted September 23, 2007 10:42 AM
xxx I am retired as a rider (but not before joining the Bonneville 200 club with a stock exhaust Busa in 2000). My team runs at Maxton (We set a new Production record today at 206.9 mph) and Bonneville next week. The bike in the avatar has been 220 on motor. The other is a custom framed turbo which was the first Japanese powered bike to go 250 at Bonneville in 2003. 
I have all the respect in the world for Terry Kizer, his accomplishments speak for themselves. LSL
____________
Home of the World's Fastest Naturally Aspirated motorcycles.
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iflyems
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Posts: 233
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posted September 23, 2007 01:45 PM
Edited By: iflyems on 23 Sep 2007 14:47
quote:
quote:
With his setup he's gonna have to run 18/38, or 40 gearing. 17t is really too small for a high horsepower turbo bike. You don't want the chain getting damaged, and you need the lower gearing to launch and race the bike, and it also raises the chain up off the swingarm.
I'll be going to an 18tooth front when I get around to ordering one.
I have an 18 tooth off my zrx1200 ..Brand new in the package . I think it's the same for a zx1400 ..You want ??
Schitt...I just ordered one from Schnitz today.....wonder if I can cancel it....???
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smokinzx14
Needs a life
Posts: 10197
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posted September 23, 2007 01:52 PM
quote:
quote:
quote:
With his setup he's gonna have to run 18/38, or 40 gearing. 17t is really too small for a high horsepower turbo bike. You don't want the chain getting damaged, and you need the lower gearing to launch and race the bike, and it also raises the chain up off the swingarm.
I'll be going to an 18tooth front when I get around to ordering one.
I have an 18 tooth off my zrx1200 ..Brand new in the package . I think it's the same for a zx1400 ..You want ??
Schitt...I just ordered one from Schnitz today.....wonder if I can cancel it....???
Just call them in the AM ...I'm sure they can cancel it .... But check first to see if my 2005 ZRX1200 sprocket is the same ...I'm 99% sure that it is but better check anyway..
____________
Smokin Performance Cycles..
Tampa Bay , FL .. Brocks Performance Dealer ..
Gen 2 ZX14R Best ET 8.43 , Best MPH 164.95
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iflyems
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posted September 23, 2007 05:23 PM
Will do....shoot me a pm with your #....thanks
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Stage XXX Mr Turbo ZX14
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Posts: 157
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posted September 25, 2007 11:46 AM
SO WHAT WAS THE FASTEST 14 AT MAXTON ??????
XXX
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