Young Ed Posted March 2, 2010 Report Posted March 2, 2010 (edited) Never seen this one before. Can't think of why I'd want to weld on a rim but this is good to know in case it comes up someday Edited March 2, 2010 by Young Ed Quote
55 Fargo Posted March 3, 2010 Report Posted March 3, 2010 Watched this video, very informative Ed.... Quote
Rollie��� Posted March 3, 2010 Report Posted March 3, 2010 kinda related but not: http://www.youtube.com/watch?v=_M0GNLvPmAg&feature=related Quote
Don Coatney Posted March 3, 2010 Report Posted March 3, 2010 That is scary. How do the nascar tires withstand the heat of glowing red brake discs? Quote
Young Ed Posted March 3, 2010 Author Report Posted March 3, 2010 Don I was wondering the same thing. Of course Nascar cars to get flats and blowouts but seems like it would be more often after watching this. Quote
Plymouthy Adams Posted March 3, 2010 Report Posted March 3, 2010 all these nascar car jockeys ..put them out there on tricylces..I rate nascar right up there with wrestling..which is about 6 feet under my septic tank Quote
48Dodger Posted March 3, 2010 Report Posted March 3, 2010 That is scary. How do the nascar tires withstand the heat of glowing red brake discs? From what I could tell...it seems the higher ply numbers carry more of the chemicals needed to cause this violent reaction. 8-12 ply side wall tires seemed to be the ones they were "blowing up". I wonder if the lower 2-6 ply are able to expand and dissipate because of less side wall chemicals etc....race tires expand a lot! After hot lapping the car/tires, I measure the tire's growth and move the larger tires to the outside of the car. I also use nitrogen to reduce mositure and expanding gases. In all though I had no proir knowlegde of tire cages.....good post Ed. 48D Quote
Don Coatney Posted March 3, 2010 Report Posted March 3, 2010 race tires expand a lot! After hot lapping the car/tires, I measure the tire's growth and move the larger tires to the outside of the car. I also use nitrogen to reduce mositure and expanding gases. In all though I had no proir knowlegde of tire cages.....good post Ed. 48D As I understand it nascar tires are "special" as they carry very low air pressure (5-6 PSI) when cold and also have a built in inner tube so they can run "flat" for a period of time. Do you run these special tires on your race car? Also (as I understand it) the use of nitrogen as the gas for tire inflation has additional benefits as it surpresses combustion. Quote
martybose Posted March 4, 2010 Report Posted March 4, 2010 As I understand it nascar tires are "special" as they carry very low air pressure (5-6 PSI) when cold and also have a built in inner tube so they can run "flat" for a period of time. Do you run these special tires on your race car?Also (as I understand it) the use of nitrogen as the gas for tire inflation has additional benefits as it surpresses combustion. First, NASCAR (and Goodyear) don't even allow that low a pressure, as it is unsafe. They probably start at 15-25 lb. depending on the track and the tire location on the car. Second, the inner liners are only used on Superspeedway tires, not short track tires. They are inflated to about 60 lbs using a separate fill valve. Lastly, there are actually very few plies in race tires, as they tend to be rather light weight. The NASCAR wheel assemblies are heavy because of the mandatory steel wheels, which have to be very strong to support the high side loads of 3600 lb. cars. We tried nitrogen in our road race tires, and found the it was a royal pain to get enough of the air out of the tire so that the pressure rise of the nitrogen was predictable; it was easier to just stick with air, which was predictable. Marty Quote
48Dodger Posted March 4, 2010 Report Posted March 4, 2010 As I understand it nascar tires are "special" as they carry very low air pressure (5-6 PSI) when cold and also have a built in inner tube so they can run "flat" for a period of time. Do you run these special tires on your race car?Also (as I understand it) the use of nitrogen as the gas for tire inflation has additional benefits as it surpresses combustion. Yep...the big boys run a small inner tube on the rim to keep it from flippin the car at high speeds after a flat tire incident. Nitrogen is more consistent as far as pressure build up goes. Compressed air has to much mositure to make any reliable changes. We (streetstock asphalt) do run low tire pressures...somewhere between 10 to 30lbs depending on the kind of track we're racing on (3/8 vs 1/4 mile plus deg of angle in the turns). I have a 60 dollar tire guage that measures very low pressures over a good size dial face. I'm sure nitrogen supresses combustion since its used as a welding shield and to displace oxygen in gas tank repairs involving welding. 48D Quote
power_hungry Posted March 4, 2010 Report Posted March 4, 2010 WOW!!! I was lucky... a few years back I had caliper on our van sieze while we were on the highway. I drove a mile or so to the exit and by that time there were flames from the caliper area. I pulled into a nearby parking lot and took a look and the rotor was glowing red and there were flames from the dirt seal on the piston. My wife always has a water jug, so I splashed some on the caliper to put out the flames. Then we chilled for a while... gave it a try and it drove fine. Did a brake job the next day in the parking lot of our hotel (not the first time) and replaced the caliper. I'm lucky that tire did't blow... never even considered it. Quote
eric wissing Posted March 4, 2010 Report Posted March 4, 2010 Doesn't the phenomenon need a thicker rubber surface for the burning to start which super heats the the tire and cause the pressure to rise so quickly? Would a thinner racing tire just pop before it could get so hot? Just thinking aloud here. Eric Quote
48Dodger Posted March 4, 2010 Report Posted March 4, 2010 Doesn't the phenomenon need a thicker rubber surface for the burning to start which super heats the the tire and cause the pressure to rise so quickly? Would a thinner racing tire just pop before it could get so hot? Just thinking aloud here. Eric I'm not an expert, but what I got from the dozen or so related videos (stemming from the one Ed posted) is there is a deteriation of the chemicals in the make-up of the tire that releases a gas into the tire. The heat causes this reaction to begin. Is it that there is a higher chemical content in the higher ply numbers of the big trucks, that make it so dangerous? That's why I was wondering if its harder to get that kind of "boom" out of a lower ply tire (ie..less chemicals involved). 48D Quote
Frank Elder Posted March 4, 2010 Report Posted March 4, 2010 WOW!!! I was lucky... a few years back I had caliper on our van sieze while we were on the highway. I drove a mile or so to the exit and by that time there were flames from the caliper area. I pulled into a nearby parking lot and took a look and the rotor was glowing red and there were flames from the dirt seal on the piston. My wife always has a water jug, so I splashed some on the caliper to put out the flames. Then we chilled for a while... gave it a try and it drove fine. Did a brake job the next day in the parking lot of our hotel (not the first time) and replaced the caliper. I'm lucky that tire did't blow... never even considered it. Tire was the least of your worries...that disc could have blown up in your face ALWAYS LET OVER HEATED BRAKES AIR COOL. Man you are lucky! Quote
41/53dodges Posted March 6, 2010 Report Posted March 6, 2010 whats worse? a cracked disk or a flaming van? Quote
Plymouthy Adams Posted March 6, 2010 Report Posted March 6, 2010 whats worse? a cracked disk or a flaming van? never having marshmellows at the right time... Quote
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