Camber, Castor and Toe.

300sx · Post by **300sx** » Fri May 09, 2008 9:15 am

btw, these will work for your camber.. not the best money can buy though..

mario_200sx · Post by **mario_200sx** » Fri May 09, 2008 9:16 am

The SX def is a car that naturally understeer.(standard)

But, when you floor it around a corner, you drive it out of the understeer into a understeer.

Do this, take your car and enter a corner at a consistant speed. (keeping the same speed)

Now use the same corner but go in faster and faster, you will reach a limit where the car will start to understeer, however if you feel the car starts to understeer, give it some gas, you can drive it into a oversteer.

Riekert · Post by **Riekert** » Fri May 09, 2008 9:19 am

mario_200sx wrote: But, when you floor it around a corner, you drive it out of the understeer into a understeer.

mario_200sx · Post by **mario_200sx** » Fri May 09, 2008 9:22 am

oversteer, you know what I meant man!

Gary57 · Post by **Gary57** » Fri May 09, 2008 9:29 am

Camber does NOT wear your tyres unevenly. Look at the old box shape BMW they had about 2 degrees negetive camber on the rears - tyres never wore unevenly. Even better check the beach buggy, I think they had like 10degrees positive camber, tyres never wore unevenly.

mario_200sx · Post by **mario_200sx** » Fri May 09, 2008 9:31 am

ok gary, if you say so, make my day and go put chamber on your car.... just remeber to take the wieght of your car in consid!

300sx · Post by **300sx** » Fri May 09, 2008 9:31 am

Now use the same corner but go in faster and faster, you will reach a limit where the car will start to understeer, however if you feel the car starts to understeer, give it some gas, you can drive it into a oversteer.

yeah , i feel you..
however , my s13 has always had the tendancy to OVERSTEER at the limit.. dunno why, always assumed that was because of the design of the rear suspension, you know ,the whole 4 squigy bushes thing deteriorating over time.. might even have been accident damage i guess..

either way, it took a lot of ajustable parts , (ajustable upper arm, ajd. control arm, toe arm) to get the car to coner to my liking..

oh , and a motor weighing 100kg more in the nose helped dail in more understeer..

mario_200sx · Post by **mario_200sx** » Fri May 09, 2008 9:35 am

The only drawback to negative camber is increased wear on the inside of each tire. Since the top of the wheel is leaned in, the car is riding on the inside of the tire while it is on straightaways. In a corner, suspension travel and lateral forces on the tire’s rubber compound combine to straighten the tire relative to the ground. Therefore, the car rides evenly on the tire in turns, which improves cornering ability. However, extra time spent driving on the inside of the tire causes that part of the tire to heat up and wear.

( I hate to quote stuff! but here is a small example. Perhaps go do some research gary.)

mario_200sx · Post by **mario_200sx** » Fri May 09, 2008 9:37 am

Remember not to add too much negative or positive camber since it will decrease the life of your tires and may cause a blowout. Even pure race cars rarely use more than about 3 degrees of camber.

(Another quote for fun)

mario_200sx · Post by **mario_200sx** » Fri May 09, 2008 9:40 am

As you may have expected, toe increases tire wear because the tires are fighting each other and, therefore, scrubbing along the ground. Toe-in tends to increase tire wear on the outside edges of the tires. Toe-out tends to increase tire wear on the inside edges of the tires. Make sure that you consider your camber setting when adding toe-out. If you are using negative camber, you are already wearing the inside of the tires more than normal. The combination of excessive negative camber and toe-out can quickly wear the inside of a tire and cause it to fail.

(Im on a roll, sorry)

Sokar · Post by **Sokar** » Fri May 09, 2008 9:51 am

Gary57 wrote:Camber does NOT wear your tyres unevenly. Look at the old box shape BMW they had about 2 degrees negetive camber on the rears - tyres never wore unevenly. Even better check the beach buggy, I think they had like 10degrees positive camber, tyres never wore unevenly.

Ahem.... I drive an E30 and I do get uneven wear at the back due to the camber, so do all the guys from the E30 club...

Gary57 · Post by **Gary57** » Fri May 09, 2008 9:53 am

I am talking 1.5-1.75degrees, you can barely see it. Im sure if I ran 30degrees negetive camber I would wear the insides of my tyres aswell.

mario_200sx · Post by **mario_200sx** » Fri May 09, 2008 9:56 am

1.5 - 1.75 is still a big enough diff to make the tyres wear uneven.

mario_200sx · Post by **mario_200sx** » Fri May 09, 2008 9:57 am

if you combine the toe adjustment with camber, the angle will get even more....

Gary57 · Post by **Gary57** » Fri May 09, 2008 10:04 am

I dont think so, I have run 1.5-1.75 degrees for 2 and a half years now with NO uneven tyre wear. I think if you had a 40 profile then yes maybe, but on a 45 I KNOW not.

Anyway I will get the front suspension checked and set the camber right.