Excessive side wall roll over

Nick · 06-11-2006, 05:08 AM

At auto x today, I was geting some excessive side wall rollover on my front tires, the scrub line was about 1 1/2" down the side wall.
Im running Hoosier a3s04 , front tires were runing 38 PSI hot, I'm consernd about going more than 40 psi that is the max raiting on the side wall.
My curent alingment is 1* camber, stock caster, 1/8th" toe.

Few problems I might be having thats coming to my mind. not enough camber, not enough tire pressure, or my alignment has sliped out.

dominojd · 06-11-2006, 08:46 AM

I would say camber is your biggest problem. Hoosier recomends a minimum of 2.5 degrees negative.

Here is a good read on care of hoosier tires.
https://www.hoosiertire.com/rrtire.htm

Nick · 06-11-2006, 02:11 PM

Quote:

Originally Posted by dominojd

I would say camber is your biggest problem. Hoosier recomends a minimum of 2.5 degrees negative.

Here is a good read on care of hoosier tires.
https://www.hoosiertire.com/rrtire.htm

That just link just sent me to hoosier's page with a bunch of news, but I assume you ment this article ? http://www.hoosiertire.com/TcT.pdf

choaderboy2 · 06-11-2006, 02:15 PM

Quote:

Originally Posted by Nick

At auto x today, I was geting some excessive side wall rollover on my front tires, the scrub line was about 1 1/2" down the side wall.
Im running Hoosier a3s04 , front tires were runing 38 PSI hot, I'm consernd about going more than 40 psi that is the max raiting on the side wall.
My curent alingment is 1* camber, stock caster, 1/8th" toe.

Few problems I might be having thats coming to my mind. not enough camber, not enough tire pressure, or my alignment has sliped out.

you need way more camber, 2.5-3.5 degrees negative depending on what your set up is like.

Nick · 06-11-2006, 02:15 PM

Quote:

Originally Posted by dominojd

I would say camber is your biggest problem. Hoosier recomends a minimum of 2.5 degrees negative.

Here is a good read on care of hoosier tires.
https://www.hoosiertire.com/rrtire.htm

That just link just sent me to hoosier's page with a bunch of news, but I assume you ment this article ? http://www.hoosiertire.com/TcT.pdf

From what I have read there ill run mytire's at 40 PSI cold on the front and work the hot PSI down to till i just start to get some roll over and set it to a point were its at an exceptable level.

Nick · 06-11-2006, 02:17 PM

Quote:

Originally Posted by choaderboy2

you need way more camber, 2.5-3.5 degrees negative depending on what your set up is like.

im trying to do that too, I have cusco plates on order but they are taking a hell of a long time to come up at my buddys shop. I think ill install some crash bolts in the mean time to help.

FastNX · 06-11-2006, 02:35 PM

How low is your car? If it's too low, you LOSE camber as the suspension rolls. So if you are running -1° of camber, you might actually have +3° of camber when in the corner. If you have pics of the car cornering, look at the front end and you will see what I mean.

This picture illustrates what I mean.

Nick · 06-11-2006, 03:05 PM

The front isnt to low its ruffly 335mm from the hub center or 595mm from the ground to the top of the well arch. ruffly 45 mm (1.3/4") lower than stock ride hight.

FastNX · 06-11-2006, 03:07 PM

At that height, you lose camber when you roll.

People like to talk about the NX having such a great suspension, but the reality is it could not be much worse once you start pushing it hard.

Nick · 06-11-2006, 03:28 PM

Quote:

Originally Posted by FastNX

At that height, you lose camber when you roll.

People like to talk about the NX having such a great suspension, but the reality is it could not be much worse once you start pushing it hard.

lol, yeah there are some limitations of the suspension thats for sure, But its half to fun to make it work.

Unfortunetly this is the only thing recent I have of my NX from 2 weeks ago. http://www.members.shaw.ca/nick18a/CIMG4040.AVI and it dosnt show much

I was having suspension jacking issues that race but over came that with increasing my bump.

I'll have to ask around to see if any friends got some shot's of my in the hair pin or hard corners that were set from yesterdays race.