Landracing Forum
Bonneville Salt Flats Discussion => SCTA Rule Questions => Topic started by: RP on January 14, 2007, 10:04:47 AM
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I assume this new motorcycle rule(7.B.8) is for rear tires......could someone clarify this? Is the 18 inch Goodyear Eagle Dragway Special slick tread motorcycle tire designed for the front still legal for a front tire?
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It sounds like another "knee jerk" rule that was not thought through by the rulers.
The note with the proposed change was as the result of 1 bad result with a wrong applicatioon and by one of them.
They could have benefited from some prior review that is so valuable to the cars for example and that additional preview might have resulted in fewer mistakes.
Dipping from the strainer basket of the gene pool comes to mind. :roll:
"Failed as designed or designed to fail ?"
THAT IS MY NICE
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Another example of not thinking about how you can read a rule.
If I have to think about it, it isn't clear. Since I am thinking about it, I would guess that the rule is talking about a drag racing slick that has a flat profile, where on a bike you would be up on a thin edge if you turned at all.
But the rule says no drag racing slicks, and that would include the entire Goodyear Eagle Dragway Special catalog. It might list the tire as am Eagle Land Speed model, but at the top of the page it still says Eagle Dragway Special.
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Maybe the 7.B.8 rule will be updated to "REAR" Drag Racing slick are not allowed?????? Since this is the first roll out of the new rules, this forum will do the proof reading for the rule makers. Last year the shaved V rated rules bounced back and forth before being written in stone for the year.
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The final scheduled presentation for approval was done only a week ago and quite late.
It did not follow the car format with a prior presentation to the clubs that might have caught the error.
I think I see a pattern.
It is hard to even guess what they mean if it is written wrong.
It kinda smells like they don't know what they are talking about.
"Things that go on behind closed doors perhaps should stay there."
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I have wondered wh, on the SCTA website, there is nothing that would allow for such questions to be asked and get an "official" answer. As we have been told the powers that be don't visit this site so we are sort of just talking to each other.
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As a volunteer organization I can see why SCTA would not want to force their folks to have to respond to any body that might post a question on their site. While I?m sure no one here would ask a ridiculous question, that might not be true for everybody. That being said, I believe you can Email individual questions to the people responsible for those areas. Am I right on this?
John
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Maybe the 7.B.8 rule will be updated to "REAR" Drag Racing slick are not allowed?????? Since this is the first roll out of the new rules, this forum will do the proof reading for the rule makers. Last year the shaved V rated rules bounced back and forth before being written in stone for the year.
Not all of the rear drag slicks are the square profile they are likely speaking of.
They are in violation of their own rules with respect to the preview of the proposed rule changes that might highlight any mistakes or obvious favoritism.
E-mail might work if it was answered but that is also selective and only one person gets a possible answer that can be as bad as the initial rule and the rest go wanting.
When answered on a forum like this the questions and answers are more accountable.
Ask the guy that not only misunderstand a rule, put it the wrong context, and then lied about it's origin.
You no longer see him around here and he has said he feels this is an "ignorant conversation."
I think I see a pattern.
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John
www.scta-bni.org the web site has the board members and the committees listed with address, e-mail etc. You can contact them and get what you are asking or direct you to someone who can help in most caes.
Glen
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there is a fellow I know who ran a "road racing" DOT tire last year to +200mph range on the rear of a typical blown M framed hayabusa. massive delamination and chunking. wide footprint. low profile. it is a DOT tire now w-i-d-e-l-y accepted in drag racing circles as gospel. wide reaching sweeps often miss what is buried under the rug.
well, its the best "dolanese" I can come up with. ;)
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Proper tire preparation and use would have allowed that tire to go substantially faster in a long LSR application.
What might work at Maxton or Gainsville, won't work on the salt without some additional conditioning.
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You can certainly e-mail them. Sometimes you get an answer. I didn't word my previous post too well (maybe I should be a rule writer!). What I meant was a section where proposed rule changes could be posted and discussed. What has bothered me for a long time is what happened this year. Rule change proposals not made available to those they may affect until January 7th. to take effect immediately. If you are building a bike or a car you could be hit with a major surprise. And for those unfortunate enough not to have this forum available getting your 2007 rule book in March is a bit late if you plan to run at El Mirage in May. Don't flame me, it's only a thought.
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Proper tire preparation and use would have allowed that tire to go substantially faster in a long LSR application.
What might work at Maxton or Gainsville, won't work on the salt without some additional conditioning.
it was prepped and passed tech as "shaved" proper prep DOT for speed rating. go figure.
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7.B.8 Tire Requirements
0-130 H rated
131-150 V rated
151 + ZR rated or V rated shaved.
No description anywhere what "shaved" might entail, but clear enough
200+ Experience has shown that using tires with hard rubber compounds and reducing the tread thickness by 2/3 by carefully shaving the tread provides the best results.
(http://sgforklifttires.com/812%20Pneu.jpg)
This is an 8.25x15 forklift tire. Should work, huh?
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Proper tire preparation and use would have allowed that tire to go substantially faster in a long LSR application.
What might work at Maxton or Gainesville, won't work on the salt without some additional conditioning.
it was prepped and passed tech as "shaved" proper prep DOT for speed rating. go figure.
bbb
I and others have done a lot of figuring and proper conditioning would include a break in session that substantially improved the bond of the tread compound to the casing.
Even the employer of the head ruler has proved that and used it to their advantage.
The speeds that are encountered in Police work on a bike have now included the adoption the break in procedure and that has made a remarkable difference in the accident rate for them due to tire failures.
Proper preparation techniques have been described here in the past and don't always include shaving a new tire. A proper tire that has been used but undamaged will be the best .
Jack
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It's hard to argue posting proposed rule changes for comment is a bad idea. It provides access to the broadest cross section of knowledge. It alows you to utilizse the good points and not use the inappropriate. However, I suspect many folks may a little more thin skinned than those trading their views here and possibly reluctant to expose themselves in that way.
John
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Have you ever argued with one of the tech guys?
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"Thin skin can be a sinister disguise for an otherwise thick head."
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Have you ever argued with one of the tech guys?
Yes, and I do my homework first to make sure they really hate it.
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:-D Works great on forklifts :wink: Maybe they will start a new class. What would the minimum be? 5.687 mph :evil:
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wheres that leave roadracing slicks are they legal. It would seem they would be. of course that leaves you with only 17 inch wheels.
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:-D Works great on forklifts :wink: Maybe they will start a new class. What would the minimum be? 5.687 mph :evil:
Actually that sounds more like it should be a maximum.
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wheres that leave roadracing slicks are they legal. It would seem they would be. of course that leaves you with only 17 inch wheels.
Don't you find them in 18 and 19 inch sizes ?
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haven't seen them in anything but 17 and 16.5 in some time. Could be I'm not looking in the right place.
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My Norton runs 19" front and rear. Finding 19" rears has become nearly impossible. Fronts are fairly readily available but the speed rating is nearly always H. If my Norton were a 200 mph bike I would have to go to 17". Finding speed rated slicks in 19" would be like finding a rule maker who knew what he was doing. 18" slicks are still available but I think you would be calling England to place the order.
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I scarfed a lot of used hard compound tires from the guys that ran Daytona in March. They were profiled on one side more than the other but a little bit of work and they were excellent.
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Avon has a 19" tire that is V rated. Dunlop still makes a 18" KR vintage road race slick and has a distributor in Florida. I believe both are tube type which would be a good thing ( no speed rating reduction for tube) if the Norton is running spoked wheels.
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The company to contact for Vintage roadracing tires in Florida is....R.C. Barker Eng. at rcbeng@gru.net..................................
They are the Dist. for Dunlap Vintage racing tires.....with some higher speed-ratings.........
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You see, leave it to a racer to figure it out.
One of the things the rulers need to learn is what resources are really available before the entrants are saddled with a rule.
The entrants are just one of the great resources but they hafta be asked.
Not all of them will tell the world for various reasons that are not always speed secrets.
If they are made comfortable with the procedure, the good information will be a lot more forthcoming.
Treat them all the same and they will treat you with respect , otherwise they will work around or walk over you.
That is kinda how I figure it anyways, and it ain't jest bikes.
OBTW: That last instant answer was from Holland.
Can he be trusted ? LOL
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Avon has a 19" tire that is V rated. Dunlop still makes a 18" KR vintage road race slick and has a distributor in Florida. I believe both are tube type which would be a good thing ( no speed rating reduction for tube) if the Norton is running spoked wheels.
Metzler also makes a 19" V rated tire, which I use.
Matt
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I sent off an email to the SCTA tech people to get a clarifaction on the No drag racing slick allowed rule change. I will post the explaination when I get it ...... for others with the same concern.
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how about something like this new Metzler DOT tire? coming out in the next week. finally.
(http://www.psychobike.com/iB_html/uploads/post-4-69111-IMG_0985.JPG)
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Tread compounds, preparation , and use will be the determining factors.
Top rated street design tires have proven to be the best.
Proper preparation and responsible use have seen them run over 260.
The same tire might have a failure at under 200 if not applied correctly.
The bike safety record owes it's success to the forewarning the tires give a rider before a catastrophic failure that will put you on your head.
The shared experience level with responsible inspection is going to do the best testing and is what keeps the sport going.
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I think the Metzler should be just fine.
(http://www.rocketindustries.com.au/images/brands/mickey%20thompson/thumb_MT3221.jpg)
The Mickey Thompson 17" ET Drag slick is what they had in mind.
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I got a quick reply from a SCTA tech person, and as I suspected, the new "Drag slicks not allowed" rule change applies only to rear tires.
We used to run an 18" rear Goodyear square corner slick, but it had a good crown to it when pumped up to the maximum PSI....worked pretty good below 150 mph, but thin sidewall constuction became a concern. That new Metzler looks pretty square edged....bbb, I would send a picture to the SCTA tech people before showing up at a race with it. If it is designed for drag racing , you might get gonged. Better to be safe than sorry.
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The squared off corners are what will cause the first problem when you get a little out of shape with a tire that is designed to always run straight up.
Moving the contact patch off center on a square tire will give you a really exciting ride.
Most of the tires that are designed for drive use on a Drag Bike are too soft to be very useful for LSR anyway reguardless of the designed shape.
That make ruling them out easier.
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it was a little leg pulling on my part.
my other proejct may get shod with the new metzler.
my lsr bike will continue to use power mediums. prepped well.