hotshot Posted December 20, 2007 Report Share Posted December 20, 2007 80"-84" on the Goodyears, that's it!!! What happens to the ride height rule we have to abide by for Thunders??? If I sit my car on tires this small I am not sure it will meet the 6" height rule. Then What??? Lenny66 you go run on a dirt track. where the rules do not change as much thank you I.M.C.A. Link to comment Share on other sites More sharing options...
NickHolt Posted December 20, 2007 Report Share Posted December 20, 2007 80"-84" on the Goodyears, that's it!!! What happens to the ride height rule we have to abide by for Thunders??? If I sit my car on tires this small I am not sure it will meet the 6" height rule. Then What??? Lenny66 The more typical circumference range is 82 - 85 on the Goodyears. The numbers that I provided earlier, in the interest of accuracy, included pretty much both ends of the circumference range. And, unless my memory has completely failed (which, at times, I suspect it has), the F-53s run about two inches greater in circumference than the Goodyears - which translates to about 0.6 inch in actual ride height. I'm not a gear man, but it doesn't sound like a biggie unless you are already running at absolute max RPMs already and you are concerned that another 120 RPMs will grenade the engine. Nick Link to comment Share on other sites More sharing options...
lenny66 Posted December 20, 2007 Report Share Posted December 20, 2007 Nick, My concern is ride height, not 120 RPM's, that's a gimme. Trying to maintain a 6" height and correct stagger is my concern with tire size. A no "minimum" clearance rule would suit me just fine. Lenny66 13.) RIDE HEIGHT a.) The ride height must be 6-inches from the lowest point of the frame to the ground, with the driver out of the car. . Any obstruction, at any point under the car, below the 6” minimum height is considered to low. Regardless of what part of the car is obstructing the 6” wheel. The only exemption is if deemed by the technical inspector that race damage from the same night is the cause of the infraction. Link to comment Share on other sites More sharing options...
sandersracing Posted December 20, 2007 Report Share Posted December 20, 2007 Nick, My concern is ride height, not 120 RPM's, that's a gimme. Trying to maintain a 6" height and correct stagger is my concern with tire size. A no "minimum" clearance rule would suit me just fine. Lenny66 13.) RIDE HEIGHT a.) The ride height must be 6-inches from the lowest point of the frame to the ground, with the driver out of the car. . Any obstruction, at any point under the car, below the 6” minimum height is considered to low. Regardless of what part of the car is obstructing the 6” wheel. The only exemption is if deemed by the technical inspector that race damage from the same night is the cause of the infraction. the old road runner rulles had a 5" rule did they not. Link to comment Share on other sites More sharing options...
abrungot Posted December 20, 2007 Report Share Posted December 20, 2007 Lenny... If you need help changing your ride height let me know... I have a secret... that is well very very easy to do.. and works great.... doesn't change spring rate's Link to comment Share on other sites More sharing options...
sandersracing Posted December 20, 2007 Report Share Posted December 20, 2007 80"-84" on the Goodyears, that's it!!! What happens to the ride height rule we have to abide by for Thunders??? If I sit my car on tires this small I am not sure it will meet the 6" height rule. Then What??? Lenny66 you go run on a dirt track. where the rules do not change as much thank you I.M.C.A. Thr does not change there rules that much, this is one of the most costly changes made in along time. Link to comment Share on other sites More sharing options...
lenny66 Posted December 20, 2007 Report Share Posted December 20, 2007 Lenny... If you need help changing your ride height let me know... I have a secret... that is well very very easy to do.. and works great.... doesn't change spring rate's Thanx Aaron, I will probably be getting in touch with you. Happy Holidays to you and your family. Lenny66 Link to comment Share on other sites More sharing options...
NickHolt Posted December 20, 2007 Report Share Posted December 20, 2007 Lenny, I should have explained that better. The tire change we are looking at will probably make about 2/3-inch difference in ride height from what you have been running. Here is a handy dandy little chart that lets you translate tire circumferences to total tire height assuming that the tire is perfectly round - which it's not when supporting several hundred pounds of weight. I mention that because the Goodyears's sidewalls are much stiffer than the F-53s and even the 970s. That means that the Goodyear's sidewalls will not "sag" as much when under load as the F-53s and 970s. It also means that the ride height difference between the two brands will not be as much as the math says it should be....which is why I'm predicting only 1/2- to 2/3-inch changes in ride heights between the Goodyears and the Hoosiers. 86 inches in circumference = 27.37 inches in total tire height 85 inches in circumference = 27.05 inches in total tire height 84 inches in circumference = 26.73 inches in total tire height 83 inches in circumference = 26.42 inches in total tire height 82 inches in circumference = 26.10 inches in total tire height 81 inches in circumference = 25.78 inches in total tire height Nick Link to comment Share on other sites More sharing options...
hray Posted December 21, 2007 Report Share Posted December 21, 2007 Not to disagree but as a question, I don't understand the "Goodyears are smaller" statement for THR the difference between 83" rollout and 85" rollout should be ~ 120 RPM. First of all, in the real world, the rollout difference is 2" - 3". Every time we went thru Graham's inventory, we found alot more 81's than 85's. We don't live in Houston so we may not have been getting the best pick. We ran 3" rear stagger and 1" front stagger at HMP (slightly less rear at THR), so we did a lot of "sunshine treatment". Second, the rollout difference equals 200 - 300 rpm at either track. That may not make any difference if you're not pushing your engine, but we cam'ed our engines for a certain rpm range and that difference made the difference between the car snapping off the turn or 'leisurely' driving off. I'm being fecious, but front runners/competitive teams in any class tune their cars on the edge. Not necessarily on the edge of grenading, but tuned to maximum performance. 200 rpm does make a difference! There is a difference in ride height. That shouldn't make much difference for classes with weight jacks or c/o's, but the lower classes that can't use suspension adjuster may have a hard time raising the ride height. As I said, I don't have a dog in this hunt, but I would like to see all the classes on the same tire no matter which one it is. That has to include TSRS because that is where most of the pulloffs are going to come from. Link to comment Share on other sites More sharing options...
bigfat Posted December 21, 2007 Report Share Posted December 21, 2007 the old road runner rulles had a 5" rule did they not. Mine was 5", everyone else in the Road Runners had to have 6". Story of my life. Link to comment Share on other sites More sharing options...
hray Posted December 21, 2007 Report Share Posted December 21, 2007 Jody, There you go stretching it again (the truth that is). Link to comment Share on other sites More sharing options...
Nathan Posted December 21, 2007 Report Share Posted December 21, 2007 what about letting us stay on the 970s for one more year? then next year have everyone switch to the F53. that way it give us a year to get pull offs from the TSRS guys and a year to get off the tires we have. Espically considering this is a make or break year (as others have stated) for the track. I don't believe it would be a good thing if car counts drop do to people not being able to purchase tires rather they be goodyears or F53. It would be alot easier to make the switch to the F53s if we had a year to get some together rather than an off season. Link to comment Share on other sites More sharing options...
Crazyhorse Posted December 21, 2007 Report Share Posted December 21, 2007 you'll go through 6 sets of take offs to one new set of goodyear. somebody has to pay full price and sooner or later those take offs may not be available when you REALLY want them. this way everybody races , everybody also races by their own budget and likeness of need. not everybody has an over abundance of take offs. Link to comment Share on other sites More sharing options...
Nathan Posted December 21, 2007 Report Share Posted December 21, 2007 so far we have found it hard to find good take offs Link to comment Share on other sites More sharing options...
Truck99 Posted December 21, 2007 Report Share Posted December 21, 2007 Question for the track management team - will there be a good selection of tires at the track if Goodyear is the tire of choice? Seems like last year there was a supply problem. With the increase in demand, just want to make sure that the tires will be available. Thanks Link to comment Share on other sites More sharing options...
sandersracing Posted December 21, 2007 Report Share Posted December 21, 2007 Question for the track management team - will there be a good selection of tires at the track if Goodyear is the tire of choice? Seems like last year there was a supply problem. With the increase in demand, just want to make sure that the tires will be available. Thanks i think the track will have the same selection of tires no mater what tire they go with just my .02 Link to comment Share on other sites More sharing options...
bigfat Posted December 21, 2007 Report Share Posted December 21, 2007 lucky for us your .02 is just that, or less. Link to comment Share on other sites More sharing options...
sandersracing Posted December 21, 2007 Report Share Posted December 21, 2007 lucky for us your .02 is just that, or less. right now i think it is less Link to comment Share on other sites More sharing options...
Guest HUFF MOTORSPORTS Posted December 21, 2007 Report Share Posted December 21, 2007 Ok Jody i have let you wait long enough for my vote. I would perfer to run the American Racer Tires but i'll vote for the Goodyears. JAMES HUFF / # 37 THUNDERSTOCK Link to comment Share on other sites More sharing options...
bigfat Posted December 21, 2007 Report Share Posted December 21, 2007 LMAO, American Racers. Thanks, but I knew that it would be another vote for the GY. Looking forward to your mirrors down here. Link to comment Share on other sites More sharing options...
speed demon 7 Posted December 21, 2007 Report Share Posted December 21, 2007 Last years Goodyear shortage was caused by a strike at the Goodyear plant. We had a shortage too for about a month. I will say this, the tires after the strike were better than the ones before, they held air for a longer period of time. Link to comment Share on other sites More sharing options...
RodneyRodriguez Posted December 21, 2007 Report Share Posted December 21, 2007 thats why I thought with TRS & SS/TS on F53's sizes and inventory would be better. Link to comment Share on other sites More sharing options...
j.j.&s.racing Posted December 21, 2007 Report Share Posted December 21, 2007 i got on goodyears web site.left sides are as follows ;softer tire#2462 hard tire#2464[advertised rollout 82"footprint 11".] 26.5 right sides;softer tire #2663, hard tires#2665[advertised roll out 84.5 footprint 11.5] 27.0 is that why some poked better then others?? which one are they buying??? houston has the softer ones on there rules. Link to comment Share on other sites More sharing options...
Nathan Posted December 21, 2007 Report Share Posted December 21, 2007 here is a link to the specs on the goodyear tire the g24 http://www.racegoodyear.com/pdf/2007_price_book/asphalt.pdf here is the hoosier tire link for the 970s and F53 (go to specs) https://www.hoosiertire.com/otatire.htm AT this point I wish they would just make a decision that way we can start looking for tire or start setting them up. Link to comment Share on other sites More sharing options...
Houston Motorsports Park Posted December 21, 2007 Report Share Posted December 21, 2007 Seems like last year there was a supply problem. With the increase in demand, just want to make sure that the tires will be available. There has never been a supply shortage of 8” Goodyear tires at HMP. HMP has always maintained adequate inventory to have stagger options available. In addition, HMP has always made its entire inventory available, at cost, to THR for all races. To make it even more convenient and financially viable, HMP supplied the tires with no upfront cost and only requested payment for the tires that were actually sold. In addition, all unsold stock could be and has been returned free of charge. Often times, Graham even made the arrangements with racers to get the tires delivered to THR. However, HMP admits that it cannot control the supply requests from the THR supplier nor can HMP control the quantity that they maintain on hand. If a shortage at THR ever occurred, it would have only taken a simple phone call to make arrangements to get additional tires, to meet demands, sent to THR. Link to comment Share on other sites More sharing options...
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