Quote:
Originally Posted by 86merc
I can't follow your circle talk. You said forget power. I said so without power we are talking no acceleration. Which means no concerns about traction for acceleration. So we are purely talking lateral handling. And 100% weight is a huge factor in traction and handling. Not only how much weight, but where it is located.
I am sure you have heard the term E = mc^2. In the most basic terms, it means that mass and energy are interchangeable when figuring kinetic energy. Add either weight or speed to a car and the forces intended to break the coefficient of friction of the tire to the road in a lateral movement increase. SO yes, weight is a huge factor is what the tires are able to handle before friction is gone and the tire slips. Obviously is the tire compounds and designs are the same, the increased tire contact patch increases traction. But there are also drawbacks to a larger contact patch. Mainly friction and weight.
If you don't want to believe weight is a factor in how a tire needs to perform, that is fine. I'll stick to know it and use it to my advantage. Good luck.
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Where did I say forget power? Unless you're assuming I'm saying forgot about the P1 making the power it makes. No. Do you see the ..... followed after the sentence? That means it's a sarcastic remark.
Understand that weight has nothing to do with determining what size tires you need for a racing/sports/hyper/powerful car.
Look at the tires that hyper cars have, why do you think they have those big tires. Because of the power the car makes. How do they make the a stay planted to the ground when it reaches higher speeds? By adding extra down force by winglets, splitters or a wing. That way the wind will push down on the car to add weight so the car will be firmly planted to the ground.
You know, that cool. Go drive a P1 with 255mm tires all around and see what happens when you go full throttle or race it around a track. Since it does weigh so little.
F1 cars also up'd they're tire size for this season from 325mm rears to the 405mm rears while uping the fronts from 245mm to 305mm for the 2017 season. The car is wider too. Body and chassis.
I don't see where you said "so without power we are talking no acceleration" comment anywhere.
Now if you're talking about straight line accel, weight still isn't an concern. It's still about the power. As I mentioned before, you want to put the power to the ground as efficiently as possible and we'll assume you're suspension/drivetrain is already setup properly. So now choose a proper sized tire for the power you're making. Would you want a 245mm rear tire when you're pushing 650rwhp since you're car only weighs 3100lbs? No. You'd want start with a 275mm tire and then try a different tire if you spin too much.
You'll actually be surprised at how many cars run 275s while making 600+rwhp and weigh over 3600lbs. Though they may be on barely street legal tires or actually slicks. Like 2nd gen CTS-V's, 03-04 Cobras, GT500s, Hellcats, etc.