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Topic: wheels
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Page 1 of 1 of 16 replies
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January 30, 2012 at
10:07:16 AM
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What if someone could take half a pound out of one wheel on a race car? what would it be worth $?
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January 30, 2012 at
10:26:01 AM
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I believe this is a pretty common quandary for all racers.
How far do you want to go I guess is the question? It's always good to reduce your rotating weight, but is the wheel strong or is it going to smash like a beer can if you bump anything?
Many racers have spend hundreds of dollars on Titanium bolt kits to shave only a few pounds. I would look at it from a "pounds saved per additional dollars spent" ratio, and address the rotating weight first.
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January 30, 2012 at
10:46:11 AM
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Racers are always looking for that added edge. If they can loose a 1/2 a pound of rotating weight, and remain durable, they will buy them.
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January 30, 2012 at
11:15:24 AM
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Reply to:
Posted By: paydirt28 on January 30 2012 at 10:26:01 AM
I believe this is a pretty common quandary for all racers.
How far do you want to go I guess is the question? It's always good to reduce your rotating weight, but is the wheel strong or is it going to smash like a beer can if you bump anything?
Many racers have spend hundreds of dollars on Titanium bolt kits to shave only a few pounds. I would look at it from a "pounds saved per additional dollars spent" ratio, and address the rotating weight first.
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we are using some amount of material that is used in todays wheels and is stronger! and still lose the 1/2 pound!
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January 30, 2012 at
11:39:08 AM
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Reply to:
Posted By: paydirt28 on January 30 2012 at 10:26:01 AM
I believe this is a pretty common quandary for all racers.
How far do you want to go I guess is the question? It's always good to reduce your rotating weight, but is the wheel strong or is it going to smash like a beer can if you bump anything?
Many racers have spend hundreds of dollars on Titanium bolt kits to shave only a few pounds. I would look at it from a "pounds saved per additional dollars spent" ratio, and address the rotating weight first.
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has anyone checked weight on brands of tires. Of the 3 manuf. who comes on lightest???? Rims are lighter now for sure than when the beadlock rims first came. Just the beadlock ring is about 1/2 the weight. course ti bolts help but it costs alot to do 4 rims. check length of bolts in rim, it does no good to have a longer bolt than what you need.
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January 30, 2012 at
11:58:44 AM
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I've never actually weighed wheels, but have heard Keizer is the lightest.
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January 30, 2012 at
12:53:38 PM
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According to Blake Robertson at BR Motorsports one pound of rotating weight is worth 90 (thats right, NINETY) pounds of static weight on a racecar from an acceleration standpoint...reducing rotating unsprung weight also allows the suspension to work better as it is easier for the shocks and springs to control less unsprung weight and less rotating weight also makes the braking system work more efficiently.
Anybody on a budget should absolutely buy titanium wheel hardware before they buy titanium chassis bolts if they want more bang for their buck.
Loose is when you hit the wall with the rear of the
car, tight is when you hit the wall with the front of
the car. Horsepower is how fast you hit the wall and
torque is how far you move the wall.
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January 30, 2012 at
01:08:00 PM
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so taken off rotating weight is ideal?
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January 30, 2012 at
01:10:56 PM
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Reply to:
Posted By: darnall on January 30 2012 at 12:53:38 PM
According to Blake Robertson at BR Motorsports one pound of rotating weight is worth 90 (thats right, NINETY) pounds of static weight on a racecar from an acceleration standpoint...reducing rotating unsprung weight also allows the suspension to work better as it is easier for the shocks and springs to control less unsprung weight and less rotating weight also makes the braking system work more efficiently.
Anybody on a budget should absolutely buy titanium wheel hardware before they buy titanium chassis bolts if they want more bang for their buck.
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so if you took 1pound of wieght out of wheels on rear, how much more horse power do you make?
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January 30, 2012 at
02:28:17 PM
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Reply to:
Posted By: fast on January 30 2012 at 01:10:56 PM
so if you took 1pound of wieght out of wheels on rear, how much more horse power do you make?
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You'd really be making no extra horsepower, you'd just be holding it back less.
I think real gains could be made by letting air out of the tires. Why have 8 or 9 pounds of air in a tire? Surely, you could get away with under 5 and end up saving almost 20 pounds of rotating weight, and air is free!
lol
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January 30, 2012 at
07:33:03 PM
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Reply to:
Posted By: harriet_othelo on January 30 2012 at 02:28:17 PM
You'd really be making no extra horsepower, you'd just be holding it back less.
I think real gains could be made by letting air out of the tires. Why have 8 or 9 pounds of air in a tire? Surely, you could get away with under 5 and end up saving almost 20 pounds of rotating weight, and air is free!
lol
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To: Harriet_Othelo, I loved your post. I think you should get a nice van and take your comedy routine out on the road this racing season. I think many promoters would pay you good money to put on a racing based comedy show if you have more material such as your air weight saving lines. LOL with a big smile on my face.
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January 30, 2012 at
09:39:59 PM
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This message was edited on
January 30, 2012 at
09:41:21 PM by buzz rightrear
Reply to:
Posted By: harriet_othelo on January 30 2012 at 02:28:17 PM
You'd really be making no extra horsepower, you'd just be holding it back less.
I think real gains could be made by letting air out of the tires. Why have 8 or 9 pounds of air in a tire? Surely, you could get away with under 5 and end up saving almost 20 pounds of rotating weight, and air is free!
lol
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if you took all those lbs of air out of the tires you would have to be careful you weren't light at the scales. 
to indy and beyond!!
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January 31, 2012 at
09:37:36 AM
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Reply to:
Posted By: badger boy on January 30 2012 at 07:33:03 PM
To: Harriet_Othelo, I loved your post. I think you should get a nice van and take your comedy routine out on the road this racing season. I think many promoters would pay you good money to put on a racing based comedy show if you have more material such as your air weight saving lines. LOL with a big smile on my face.
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under 5 lbs would probably get you into the grand stand if on rt rear. You weigh a tire with 5 lbs and 1 with 9 pounds and let us know results. who knows, you might be right
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January 31, 2012 at
09:58:06 AM
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Don't laugh at Harriet I have heard worse,but,I remember back a few years a really popular Nascar team didn't measure tire wear on the tread they weighed all four wheel tire combos before they were installed,this involved them being really really clean,then they would run twenty five or thirty laps come in,clean all four units clean again then weigh them,to find where they were actually losing the weight of the unit in each position and adjusted accordingly,those guys down that way do some things differently .If I told you who they were,you wouldn't believe it.
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January 31, 2012 at
10:09:22 AM
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This message was edited on
January 31, 2012 at
10:10:45 AM by hinesks
Reply to:
Posted By: darnall on January 30 2012 at 12:53:38 PM
According to Blake Robertson at BR Motorsports one pound of rotating weight is worth 90 (thats right, NINETY) pounds of static weight on a racecar from an acceleration standpoint...reducing rotating unsprung weight also allows the suspension to work better as it is easier for the shocks and springs to control less unsprung weight and less rotating weight also makes the braking system work more efficiently.
Anybody on a budget should absolutely buy titanium wheel hardware before they buy titanium chassis bolts if they want more bang for their buck.
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Ok so one pound of rotating weight is 90 static pounds! Wow any racer would be interested in loosing that in his race setup. I think fast maybe onto something here. If his wheels are 1/2 pound lighter and stronger than conventional aluminum wheels, you could be saving possibly 360 pounds of static weight. WOW! As stated also less weight does not increase horsepower but every pound of reduced rotating weight means more energy is used in forward motion.
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January 31, 2012 at
08:28:22 PM
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darnall,
Did you get an explaination of that comparison? What radius from the axle centerline does that one pound assume?
-Kyle Chady
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February 01, 2012 at
09:31:53 AM
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Reply to:
Posted By: KCR57 on January 31 2012 at 08:28:22 PM
darnall,
Did you get an explaination of that comparison? What radius from the axle centerline does that one pound assume?
-Kyle Chady
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Wheels are already very very expensive, and they are already too light duty for many racetracks, especially in the northwest. I have split halves after not even hitting anything..
Using a completely worn out tire thats burned way down takes almost 8 pounds of rotating weight off each side, but you don't see anyone doing that ..The old saying that you must first finish to finish first would seem to hold true, and I suppose if your budget was very deep running super light wheels may be your cup of tea, I however would be willing to sacrifice a bit of weight for something that could take the abuse of holes, ruts, and the occasional front chute rub... And I am a lard butt that can use any weight savings known to man...lol
44H
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