68 camaro carbon fiber

[Funk]

8) helemaal goed

[ampcamaros]

Mooi Camaro project man,daar zijn er maar weinig van in het land.
Ben erg benieuwd hoe hij eruit gaat zien.

Gr.Mike AMP

[roadrage david]

Vandaag de wielen opgehaald, en de hele dag met een dikke ... rond gelopen.

Hier nog wat foto's:









Erik

Erik ga die banden er maar opnieuw opzetten dat gele rondje hoort presies in lijn te zijn met je ventiel!!!!! het zijn race banden dat moet presies zijn voor de balansering..

[Thing]

nee dave dat is enkel een fabrieks markering....
Hoeft niet bij het ventiel.....

[Corp]

mooi wel, dat gele rondje geeft de plaatst aan waar de band het lichtste is en is dus bedoeld om recht in lijn met het ventiel geplaatst te worden...

[Thing]

wie zegt dat het wiel daar het zwaarst is?
Misschien heeft hij zijn banden wel eerst gematchd op het wiel dat er zo min mogelijk zink op moet

[Corp]

Nou, wat dacht je van..er zit daar een ventiel? Je weet dus van de fabrikant dat zijn band daar het lichtste is, dus als je dat tegenover het ventiel zet dan weet je zo goed als zeker dat je met zo min mogelijk lood kunt balanceren. En op een billet wiel of een meer delig race wiel is over het algemeen veel minder lood nodig dan op een stalen velg of een gegoten velg omdat de velgen veel nauwkeuriger vervaardigd zijn en de gebruikte materialen een veel constantere samenstelling hebben.

[Thing]

jij wil zeggen dat als je de gele markering tegenover het ventiel zet je automatisch het minste zink gebruikt? bull....
maakt niet uit wat voor wiel oud of nieuw groot of klein er zijn er geen 2 identiek als je ze los op een balanceer machine hangt.....
het is ouderwets en achterhaalt.....
Michelin en goodyear zetten die markeringen er nog amper op....

[Corp]

zink?

Het zijn geen normale straatbanden wat er op die velgen zitten, en jij vergelijkt normale autovelgen met die van hem. Die banden zijn bedoeld voor de racerij, dus ook voor race velgen, luchtgewicht velgen meerdelig voornamelijk die daardoor een veel uniformere gewichtsverdeling hebben t.o.v. stalen of gietvelgen.

Appels en peren!!!

Maar ja, jij weet het beter dus

http://www.eng-tips.com/viewthread.cfm?qid=86379&page=3

[roadrage david]

LOL dit is leuk!! Thing, ik en Corp hebben gelijk(wie had ooit gedacht dat we een keer op 1 lijn staan) dit zijn zoals eerder gezegt geen straat banden. Ga even met 200+kmh en in mijn geval 300+kmh rijden met niet gesentreerde race banden!!. dan hebben we problemen., weet jy hoeveel omwentelingen een band maakt met die snelheid EN hoeveel meer side load die banden krijgen in een corner.... nee. gewoon even er af en er opnieuw op.......... dat gele rondje zit er echt niet voor niets op vanuit de fabriek...

[Corp]

Ik ben het wel vaker met je eens maar antwoord dan niet om de rust te bewaren LOL, zoals die waardeloze KYBs vervangen door konis of bilsteins

[Thing]

sorry dat ik je uit de droom wakker moet maken Dave

jullie slaan allebei de plank mis...

ik heb even nagevraagt aan bijna 70 jaar ervaing op banden gebied...

die gele markering is niets meer dan dan een stempel die "approved" voorstelt

en 2 vertegenwoordigers van 2 fabrikanten (die beide ook race banden produceeren)

is het een approved stempel... gezet door een computergestuurde scanner

ohja.. ik heb het afzonderlijk gevraagt... 2 per telefoon (vertegenwoordigers)
en mijn werkgever(24 jaar in de banden) en diens vader (begonnen op zijn 15e en 3 jaar met pensioen.... )

oftewel... ouderwets en achterhaald... draaien is niet nodig...

Back on topic

[roadrage david]

Thing ik denk dat die 75 jaar ervaring zijn peak had in periode 1914 toen Michelin solid rubber tires aan citroen gaf in WW1.
schrol even 90% naar beneden op de link!! heb het hier ook even neer gezet en voor de record de site heet THE WHEEL AND TIRE BIBLE http://www.carbibles.com/tyre_bible.html

Coloured dots and stripes - whats that all about?
When you're looking for new tyres, you'll often see some coloured dots on the tyre sidewall, and bands of colour in the tread. These are all here for a reason, but it's more for the tyre fitter than for your benefit.
The dots on the sidewall typically denote unformity and weight. It's impossible to manufacture a tyre which is perfectly balanced and perfectly manufactured in the belts. As a result, all tyres have a point on the tread which is lighter than the rest of the tyre - a thin spot if you like. It's fractional - you'd never notice it unless you used tyre manufacturing garage equipment to find it, but its there. When the tyre is manufactured, this point is found and a coloured dot is put on the sidewall of the tyre corresponding to the light spot. Typically this is a yellow dot (although some manufacturers use different colours just to confuse us) and is known as the weight mark. Typically the yellow dot should end up aligned to the valve stem on your wheel and tyre combo. This is because you can help minimize the amount of weight needed to balance the tyre and wheel combo by mounting the tyre so that its light point is matched up with the wheel's heavy balance point. Every wheel has a valve stem which cannot be moved so that is considered to be the heavy balance point for the wheel. (Trivia side note : wheels also have light and heavy spots. Typically the heaviest spot on the wheel is found during manufacture and the valve stem is then located diametrically opposite that point to help balance the wheel out).
As well as not being able to manufacture perfectly weighted tyres, it's also nearly impossible to make a tyre which is perfectly circular. By perfectly circular, I mean down to some nauseating number of decimal places. Again, you'd be hard pushed to actually be able to tell that a tyre wasn't round without specialist equipment. Every tyre has a high and a low spot, the difference of which is called radial runout. Using sophisticated computer analysis, tyre manufacturers spin each tyre and look for the 'wobble' in the tyre at certain RPMs. It's all about harmonic frequency (you know - the frequency at which something vibrates, like the Tacoma Narrows bridge collapse). Where the first harmonic curve from the tyre wobble hits its high point, that's where the tyre's high spot is. Manufacturers typically mark this point with a red dot on the tyre sidewall, although again, some tyres have no marks, and others use different colours. This is called the uniformity mark. Correspondingly, most wheel rims are also not 100% circular, and will have a notch or a dimple stamped into the wheel rim somewhere indicating their low point. It makes sense then, that the high point of the tyre should be matched with the low point of the wheel rim to balance out the radial runout.

What if both dots are present?
Generally speaking, if you get a tyre with both a red and a yellow dot on it, it should be mounted according to the red dot - ie. the uniformity mark should line up with the dimple on the wheel rim, and the yellow mark


Ok NOW WE GO BACK ON TOPIC I REST MY CASE!!!!!!!!!!!11

[roadrage david]

Even voor de duidelijkheid mocht je nog met een verhaal komen NASCAR gebruikt het ook

When it comes to race tires, they're Champion; Racing-based dealership serves some of biggest wheels in NASCAR.
Publication: Tire Business
Publication Date: 11-SEP-06 Format: Online
Delivery: Immediate Online Access
Full Article Title: When it comes to race tires, they're Champion; Racing-based dealership serves some of biggest wheels in NASCAR.(Champion Tire & Wheel Inc.)(Company overview)

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Article Excerpt
Byline: Jeff Yip

Think your shop had a tough week handling inventory and your customers' wheels and tire needs? Consider the major league grind faced by Champion Tire & Wheel Inc.

About 37 weeks during the year, the Cornelius, N.C.-based company just north of Charlotte serves some of the most demanding drivers in the U.S. Just a few of the names you should recognize: Kasey Kahne, Jeff Gordon, Tony Stewart, Jimmie Johnson, Matt Kenseth and Dale Earnhardt Jr.

Champion Tire-which has no retail stores and operates solely for racing venues-is entrusted to take care of more than 4,000 wheels per week for most of the teams in NASCAR's Nextel Cup, Busch Grand National and Craftsman Truck racing. Champion Tire operates 17 tractor-trailers to take care of its customers.

They may be just 15-inch wheels, but the investment is anything but ordinary in NASCAR's brutal environment. Each team buys roughly 300 wheels per year at $100 a pop, said Kevin Mahl, who started the dealership in 2002 with Jamie Rolewicz.

Wrecks take their toll, and that's why NASCAR teams usually have 60 wheels each on race weekends (72 at Darlington Raceway in South Carolina).

"We bring back at least 10 damaged wheels every week,'' Mr. Mahl said. "Some get smashed up pretty good-to the point where it is a challenge to get the tire off the wheel. They come back smashed with paint on them from another car, the wall or concrete dust-depending on what kind of hazard they got into.

"Even though they are wrecked, we still bring them back so we can scan them out of the system and tag that wheel number as damaged.''

Champion marks the "low spot'' on each wheel with a bar code. This lets
-----------------------------------------------------------------------------
the mounters at the racetrack line that mark up with the yellow dot on
----------------------------------------------------------------------------
the tire, also known as the "high spot'' or the radial first harmonic dot.
----------------------------------------------------------------------------
This creates what might be called a "match-mounted'' assembly and
---------------------------------------------------------------------------
helps the teams manage the consistency of the tires and wheels better
-----------------------------------------------------------------------------
throughout the course of a race, Mr. Rolewicz said.

"It is not always safe to assume that the things that make a wheel `good' will stay in check throughout the course of a 37-race season,'' according to Mr. Mahl. "If you think of the life of a race wheel-we take delivery of the wheels for teams in December and January, it gets prepped for the season, then transported, unloaded, mounted, raced on, loaded at the track, unloaded, dismounted, de-glued, washed, restocked and ready to transport to the next race-there are plenty of opportunities for something to cause a wheel to go out of tolerance.

"We try and look at what we do from a crew chief's perspective and ask ourselves how we would want our wheels and tires handled if we were them. It is becoming more and more recognized that every force that the driver feels travels through those four wheels and they should be considered a critical piece of the overall suspension. The teams have developed a confidence in us to know that the wheels we are bringing to the race track are ready to go on the race track.''

Champion Tire, which has 50 full-time employees and several part-timers, was formed in September 2002 and supplied and tested race tires to NASCAR teams. Mr. Mahl, who holds a B.S. in chemical engineering and an M.B.A., was with Goodyear for 13 years as a race tire engineer and product manager. Mr. Rolewicz, who holds a B.S. in civil engineering, worked in Goodyear's racing projects as well. NASCAR instituted a tire leasing program for the 2006 season, but Champion Tire still works with teams that have stockpiled tires.

All tires are mounted with "state-of-the-art'' equipment from Bridgeton, Mo.-based Hunter Engineering Co., Mr. Mahl said.

"The thing we like about the Hunter is the nylon mounting heads, which tend to take care of the wheel, the safety inner-liner and the tire beads,'' he said. "They are then balanced on the Hunter GSP9700 using the new `SmartWeight' technology. We really are starting to build a lot of confidence in the SmartWeight software.

"The technology seems to be changing decades-old thinking about `balance' by essentially shifting the amount of residual radial and lateral forces left in the assembly after balancing is completed. Because of this, we are starting to believe that the end result is a better performing tire-and-wheel assembly, especially in a high-speed racing situation.''

"It's not that traditional balancing is wrong, but it's a waste of time and a waste of weight,'' said Dave Scribner,...


DAN HEBBEN WE BRIDGSTONE TIRES
http://www.bridgestonetrucktires.com/us ... Doctor.asp

HOOSIER TIRES
http://www.hoosiertire.com/springrt.HTM


NOUGHF SAID!!!!!!!!!!!!!!!!!

[ampcamaros]

He Dave ,zijn dat die Nittos waar je het over had in muiden.
Mike