What Do You Guys Think?(wheels)
#46
Joined: Jul 2008
Posts: 849
Likes: 10
From: San Ramon, CA
when you lower the car, you allow more room for the stretched tire to tuck into the fender. It introduces more negative camber, and when you're putting wide wheels with low offsets on a sedan and stretching tires, you need negative camber.
Like i said earlier... to fit a 19x10 +20 on a G sedan with around a 2" drop, all you need is around -1.8 camber and a 255/35 tire, or a 245/40 like the OP wants to run.
-1.8 camber is NOTHING... i've ran up to -3.5 on my sedan and the tires didnt wear that fast, as long as the TOE is in spec, you're fine. TOE is the real tire killer.
-GP-
Like i said earlier... to fit a 19x10 +20 on a G sedan with around a 2" drop, all you need is around -1.8 camber and a 255/35 tire, or a 245/40 like the OP wants to run.
-1.8 camber is NOTHING... i've ran up to -3.5 on my sedan and the tires didnt wear that fast, as long as the TOE is in spec, you're fine. TOE is the real tire killer.
-GP-
people need to understand also...camber does not kill tires, TOE DOES!!!!
ive ran 3-4 degrees of negative in the rear of my s2000 and i drove around with that setup for over 2 years, and i DID have some camber wear, but never did i have premature tire wear. i got at least 15k out of my tires, which was more than enough life for the type of driving i was doing in that car.
a vehicle needs to have some negative camber dialed in in order to handle good. look at it this way. when you are making a turn, the vehicle will lean, and SO WILL THE TIRES. by having negative camber set up, when you make a turn, the contact patch on the wheels will be at 100% efficiency, or whatever it will be, where as if you had a suspension set up with no camber, or very little, the wheel will have positive camber as you make the turn, thus reducing the contact patch, and the amount of traction/grip you have
#49
I do understand how camber works. There's no question its a necessary part of suspension tuning but additional camber isn't really necessary unless you're cornering hard at 80mph daily.
What I don't understand is how it helps clearance issues if you took the spring out of the car completely, the rear suspension would move in the same arc no matter where you started from which means if you contact at 1" lowering, you're still going to contact at 2" lowering unless you further add camber beyond what the suspension does on its own.
Let's take my car...I experience some rubbing in corners. When the suspension is compressed, it hits my unrolled fender. If I then put my car on coil overs and drop it 3", the car will simply rest on the fenders. If jump on the trunk, the tires will probably flex past the fenders but when I put the car on the lift, it'll just get stuck when the suspension decompresses...not something for everyday driving. Lowering isn't a solution to interference unless you're talking about adding camber(more than the natural arc of the wheel travel) into the equation.
Basically all I'm saying is that what's getting you past that point beyond the pulled fenders is additional camber. The lowering doesn't help unless the rear suspension suddenly changes travel direction when you go below say 2".
#50
ENVautoDetailing.com
iTrader: (47)
Joined: Sep 2005
Posts: 9,257
Likes: 136
From: San Diego/Redondo Beach
Uh, I think I've actually been here longer than you.
I do understand how camber works. There's no question its a necessary part of suspension tuning but additional camber isn't really necessary unless you're cornering hard at 80mph daily.
What I don't understand is how it helps clearance issues if you took the spring out of the car completely, the rear suspension would move in the same arc no matter where you started from which means if you contact at 1" lowering, you're still going to contact at 2" lowering unless you further add camber beyond what the suspension does on its own.
Let's take my car...I experience some rubbing in corners. When the suspension is compressed, it hits my unrolled fender. If I then put my car on coil overs and drop it 3", the car will simply rest on the fenders. If jump on the trunk, the tires will probably flex past the fenders but when I put the car on the lift, it'll just get stuck when the suspension decompresses...not something for everyday driving. Lowering isn't a solution to interference unless you're talking about adding camber(more than the natural arc of the wheel travel) into the equation.
Basically all I'm saying is that what's getting you past that point beyond the pulled fenders is additional camber. The lowering doesn't help unless the rear suspension suddenly changes travel direction when you go below say 2".
I do understand how camber works. There's no question its a necessary part of suspension tuning but additional camber isn't really necessary unless you're cornering hard at 80mph daily.
What I don't understand is how it helps clearance issues if you took the spring out of the car completely, the rear suspension would move in the same arc no matter where you started from which means if you contact at 1" lowering, you're still going to contact at 2" lowering unless you further add camber beyond what the suspension does on its own.
Let's take my car...I experience some rubbing in corners. When the suspension is compressed, it hits my unrolled fender. If I then put my car on coil overs and drop it 3", the car will simply rest on the fenders. If jump on the trunk, the tires will probably flex past the fenders but when I put the car on the lift, it'll just get stuck when the suspension decompresses...not something for everyday driving. Lowering isn't a solution to interference unless you're talking about adding camber(more than the natural arc of the wheel travel) into the equation.
Basically all I'm saying is that what's getting you past that point beyond the pulled fenders is additional camber. The lowering doesn't help unless the rear suspension suddenly changes travel direction when you go below say 2".
When you're stretching tires, you NEED to have a good drop to complete the look, the top of the tire is supposed to tuck into the fender while the wheel is supposed to stick out. You cant have that look with a 1" drop. IMO, you need ATLEAST a full 2" drop to have an aggressive setup.
Oh, and last, doesnt matter how long you've been on this site, that doesnt determine how much you know about cars. I've learned everything i've learned about offsets/camber/suspension and how they work together in the last 2 years and can school anyone on the subject.
One more tid bit... do a mild roll on your rear fenders and it'll never rub again... takes 20 minutes with a hair dryer and a wooden baseball bat or dowel.
-GP-
#51
I'm really not trying to argue w/ you guys. I merely asked a question as to how suspension which travels in an arc can logically not contact the same fender w/o physically adjusting the camber. Please look in my message...I say that I know when suspension compresses it increases the camber angle of the wheel. The issue that I'm focused on is if my suspension contacts now, no lowering will fix it until I either remove the obstacle by rolling the fender or changing my alignment/camber to clear. If you introduce those changes, you definitely can get the aggressive offset to clear but I was asking how it was physically possible with only ride height changes. My suspension compressed 1" by a bump has the tire in the exact same position as if I was lowered 2".
As for my car, I'm getting the fenders rolled next month once I have more time since I'm barely driving at all right now.
I wasn't insulting your experience Gdup...I was commenting on the fact I was called a newb by another member. I've worked on enough cars over the past decade to understand suspension well enough that I think the question I posed is completely valid. I think you answered my question sufficiently though...you effectively said you have to change the suspension settings after lowering further which was my original position.
As for my car, I'm getting the fenders rolled next month once I have more time since I'm barely driving at all right now.
I wasn't insulting your experience Gdup...I was commenting on the fact I was called a newb by another member. I've worked on enough cars over the past decade to understand suspension well enough that I think the question I posed is completely valid. I think you answered my question sufficiently though...you effectively said you have to change the suspension settings after lowering further which was my original position.
Last edited by mishap; 02-25-2009 at 12:34 PM.
#52
ENVautoDetailing.com
iTrader: (47)
Joined: Sep 2005
Posts: 9,257
Likes: 136
From: San Diego/Redondo Beach
I'm really not trying to argue w/ you guys. I merely asked a question as to how suspension which travels in an arc can logically not contact the same fender w/o physically adjusting the camber. Please look in my message...I say that I know when suspension compresses it increases the camber angle of the wheel. The issue that I'm focused on is if my suspension contacts now, no lowering will fix it until I either remove the obstacle by rolling the fender or changing my alignment/camber to clear. If you introduce those changes, you definitely can get the aggressive offset to clear but I was asking how it was physically possible with only ride height changes. My suspension compressed 1" by a bump has the tire in the exact same position as if I was lowered 2".
As for my car, I'm getting the fenders rolled next month once I have more time since I'm barely driving at all right now.
I wasn't insulting your experience Gdup...I was commenting on the fact I was called a newb by another member. I've worked on enough cars over the past decade to understand suspension well enough that I think the question I posed is completely valid. I think you answered my question sufficiently though...you effectively said you have to change the suspension settings after lowering further which was my original position.
As for my car, I'm getting the fenders rolled next month once I have more time since I'm barely driving at all right now.
I wasn't insulting your experience Gdup...I was commenting on the fact I was called a newb by another member. I've worked on enough cars over the past decade to understand suspension well enough that I think the question I posed is completely valid. I think you answered my question sufficiently though...you effectively said you have to change the suspension settings after lowering further which was my original position.
I told the OP in his new thread that he needs to drop the front more, which will tuck the tire right under the fender, as opposed to where it sits right now. There is no camber correction on the front with out a kit, therefor the camber will increase and the setup will look perfect.
-GP-
#53
I wasn't insulting your experience Gdup...I was commenting on the fact I was called a newb by another member. I've worked on enough cars over the past decade to understand suspension well enough that I think the question I posed is completely valid. I think you answered my question sufficiently though...you effectively said you have to change the suspension settings after lowering further which was my original position.
Like Grant said, it doesn't matter how long you've been here.
#60
i agree with gdup
people need to understand also...camber does not kill tires, TOE DOES!!!!
ive ran 3-4 degrees of negative in the rear of my s2000 and i drove around with that setup for over 2 years, and i DID have some camber wear, but never did i have premature tire wear. i got at least 15k out of my tires, which was more than enough life for the type of driving i was doing in that car.
a vehicle needs to have some negative camber dialed in in order to handle good. look at it this way. when you are making a turn, the vehicle will lean, and SO WILL THE TIRES. by having negative camber set up, when you make a turn, the contact patch on the wheels will be at 100% efficiency, or whatever it will be, where as if you had a suspension set up with no camber, or very little, the wheel will have positive camber as you make the turn, thus reducing the contact patch, and the amount of traction/grip you have
people need to understand also...camber does not kill tires, TOE DOES!!!!
ive ran 3-4 degrees of negative in the rear of my s2000 and i drove around with that setup for over 2 years, and i DID have some camber wear, but never did i have premature tire wear. i got at least 15k out of my tires, which was more than enough life for the type of driving i was doing in that car.
a vehicle needs to have some negative camber dialed in in order to handle good. look at it this way. when you are making a turn, the vehicle will lean, and SO WILL THE TIRES. by having negative camber set up, when you make a turn, the contact patch on the wheels will be at 100% efficiency, or whatever it will be, where as if you had a suspension set up with no camber, or very little, the wheel will have positive camber as you make the turn, thus reducing the contact patch, and the amount of traction/grip you have
But I understand that the neg camber is done for fitment reasons and not necessarily handling.
In the case of the sedan, 1.8 neg isn't unreasonable IMHO. I think that is just out of the 350z oem spec?