| Author | Message | ||
     Xbnick12r |
I have a design for a modified stock muffler but the way the outlet is hooked up it points at the back wheel, not off to the side like most (think of a drummer with a wider and shorter oval tip pointing back). would that design adversely affect the back tire temp/traction at all. the tip of the muffler is about 3-4 inches away from the tire. a couple of my friends said that it shouldn't be a problem but I wanted more opinions. | ||
| Rah7777777 |
well the heat is going to only help with your traction (hot rubber sticks better) but over a long period of time, it might take a negative affect. but that would take a while i would think. it might make your tire pressure go up a little more than you want, so maybe when you adjust your tire pressures (cold) drop it an extra couple PSI. that way when the extra heat gets to the tire and raises the pressures, you'll be right on specs (hot). but overall I would not worry about it. if your doing all higher speeds you wont have hardly any issues. but traffic would for sure make the temps go up a bit (1-3 PSI). i say go for it!!!!!!! | ||
| Js_buell |
Actually heat help traction to a certain point, too much heat and then it's the opposite that will happen. | ||
| M1combat |
And it doesn't take too spirited of riding to overheat the tire. It takes a good ten miles if you're riding hard. I generally have more trouble keeping them cool so they don't get greasy than I have warming them up. I wouldn't want anything heating up the tire except maybe in the winter. I wouldn't do it. | ||
| Punkid8888 |
I would not worry about it too much, the only time your gonna notice it is sitting at a light for a while, or durning start up. I will say watch out on the cool morning the exhaust will spit out a lot of moisture and it will keep the tire damp until the bike comes up to operating temp. But again once the tire is spinning I see little effect on it. I actually have the same situation on my 72 Dodge truck. I dumped the exhaust before the rear tires, but with the angle it actually rolls around the tires (when you can see the exhaust in the morning) and it will make droplets on the tire. But once its warm its fine | ||
| Fmaxwell |
Better hope that there's no oil blow-by that gets out the exhaust. Also, the heat of the exhaust in a Buell is way different than the heat from a '72 Dodge truck, where the exhaust has been cooling through ten feet of pipe. I'd bet that the temperature would be too high to be safe. Imagine sitting still at a long light on a hot day with the exhaust dumping on one spot on the tire. That could get scary-hot. | ||
| Slaughter |
Don't do it for all the above reasons. You DO NOT WANT a hot spot on the tire. Period. You do not want unpredictable handling. Period. | ||
| Teeps |
If hot exhaust gas flowing over a tire was beneficial, we would see it done on race bikes, then production bikes. | ||
| U4euh |
Hot rubber wears out faster, no? If you have a 'hot spot' that just seems dangerous to me. I have designed my own muffler and went through exactly the stage your at right now, and I decided against it. It is not that much harder to weld a piece of angled pipe on there. With my design, I ended up using the stainless cover that came on the pipe, and cut the outlet hole to match the inner diameter of that pipe. Sounds really good also.IMHO | ||
| Punkid8888 |
maybe I should of went into a little more depth. 1972 Dodge D100 440 RB engine. Aftermarket intake, Cam, Headers, 3 inch exhaust, with 40 series mufflers (maybe 8 feet long) with a Holley 750cfm carb. currently it runs a 13.76 @ 100mph in the 1/4 mile which is only a little a second slower the my Buell 12.656 @105.6mph. so its a little more then your average truck  anyways I just wanted show off my truck a little sorry for getting off topic but on a bike it is much different. Like U4euh said, how about a small peice of metal shaped like a V and weld it right in the center of the oval tip, but in far enough where its not noticeable | ||
| Diablobrian |
Bad idea. You do not want a hot spot on your rear tire. Each time your tire warms up and cools down it gets a little bit harder (heat cycle) because volatile chemicals are cooked out of the rubber. You do not want to accelerate the process. Street tires get more cycles than race tires, but there are still only so many in the life of a tire. | ||
| Slaughter |
Also - you don't want to have just one hot spot (idling when stopped) - the ruber is softer and then will let the tire flex more in that spot - no good no matter how you look at it. Just not a good idea. | ||
| Glitch |
Exhaust gas and tires. will i have a problem? Yes. |
