Cm vs steel kmember
If you're building a dedicated car and every ounce is important, then get CM. if its a driver and you're not overly concerned about the weight, then don't worry about it. It's all a matter of if you want to pay for the lighter parts.
I believe the cm is stronger. If you are pulling the tires off the ground pretty hard you might want to get the cm. Also if you are doing a lot of autox then you should also get the cm. But just trying to save some weight get the mild steel.
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Someone once it explained to me that CM was lighter and stronger but in the event of an accident it would be more likely to break. Mild steel would be more likely to bend under the same circumstances. Take it for what it is, I'm sure even mild steel will break if you hit it hard enough.
I have an old CM k-member from PA Racing. No complaints but I haven't tested it's breaking strength either...thankfully.
I have an old CM k-member from PA Racing. No complaints but I haven't tested it's breaking strength either...thankfully.
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Brett Foote
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Someone once it explained to me that CM was lighter and stronger but in the event of an accident it would be more likely to break. Mild steel would be more likely to bend under the same circumstances. Take it for what it is, I'm sure even mild steel will break if you hit it hard enough.
I have an old CM k-member from PA Racing. No complaints but I haven't tested it's breaking strength either...thankfully.
I have an old CM k-member from PA Racing. No complaints but I haven't tested it's breaking strength either...thankfully.
I've heard the exact same things regarding the strength. I've heard that chromoly is not as forgiving as regular steel. I'm pretty sure all of the NASCAR cars use regular steel, so they must do it for a safety reason.
Chromoly is not any lighter than regular steel. A given volume of it weighs exactly the same as the regular stuff. Chromoly is stronger which allows you to use thinner walled tubing than you would normally use with regular steel. That is where all of the weight savings come from, there is physically less metal used in building whatever part. For a k-member it is worth the extra cost, because of how much tubing is used and how much weight is saved. I've heard that it saves near 8-10lbs on a k-member. That is a good deal for $100. On the a-arms i've seen lowers go for an extra $100, and in my opinion, it isn't justified for the weight savings which would only be 1-2lbs. Maybe if you could find a package deal like many of the vendors run around x-mas time and get the entire setup in chromoly it would be worth the money. There MAY come a time down the road when you get serious with your car and you'll be looking to save weight wherever you can, and you'll kick yourself for not spending the $100 extra. A rollcage is another item that is very beneficial in going with chromoly. Typically it will cost $200-$300 more for the material but you'll save 20-30lbs easy.
I've heard the exact same things regarding the strength. I've heard that chromoly is not as forgiving as regular steel. I'm pretty sure all of the NASCAR cars use regular steel, so they must do it for a safety reason.
I've heard the exact same things regarding the strength. I've heard that chromoly is not as forgiving as regular steel. I'm pretty sure all of the NASCAR cars use regular steel, so they must do it for a safety reason.
If you are going to drive the car on the street a bunch I would stay away from the CM just because it won't hold up all that well to pot holes or even in the worst case a accident.
Kyle
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Glenn ***
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Glenn ***
Sales Tech
www.bmrsuspension.com
813.986.9302
Find a Quality alignment shop near you!
