46 replies to this topic

[Kurt]

I have found that with the rear internal sway bar welded up and my new 195/50/15 '' rubber when taking hard fast turns the rear inside wheel lifts of the ground. Its kinda funny at round abouts because it holds the wheel in the air the hole way around. Have to be pushing it hard to get it to do it. But gets some crazy looks from other drivers.

So whats the fix, stiffer front end or am I asking to much of the little beast?

[nivek2002]

Do some searching we just had a post about this. Yes its a fairly common thing in our cars.

Got any pictures? If so you might get into the mext monthly background

3,000!!!!

Edited by nivek2002, 11 August 2004 - 09:13 AM.

[Ghost-One]

i think i am quoting krispy here
"if yoiy arnt lifting a wheel you are not going fast enough"

[RexKrazy]

i think lifting a rear wheel is a sign of understeer. my car used to do that, but i got stiffer t-bars and welded the rear bar, and now it stay's level and neutral. ever seen an oversteering car lift the front wheel?

[eadohcturbo]

sounds like your driving the car as you should and its set-up right. Common sight .

[Aren D.]

yeah man if your pulling tires off the ground insted of slideing out that means your car sticks and it sticks well.

[Greg Gauper]

ever seen an oversteering car lift the front wheel?

Yes....old 911 Porshes do it all the time. And at the runoffs in the 90's (last year of the SSA class) the BMW's used to get their front wheels a good 6" off the ground going thru turn 11 (corner leading onto Thunder Valley).

[CRXfanatic]

Commonly referred to as dog pissing, and it ain't a bad thing...

[RexKrazy]

ever seen an oversteering car lift the front wheel?

Yes....old 911 Porshes do it all the time. And at the runoffs in the 90's (last year of the SSA class) the BMW's used to get their front wheels a good 6" off the ground going thru turn 11 (corner leading onto Thunder Valley).

exactly my point

and DAMN that's a clean 1g. sm2? d16?

[CRXfanatic]

Thanks. Si motor with lots of head work... I figured SM2 was a better class for me than EP...

[RexKrazy]

sm2 is real competitive here. keeps me busy

[rpr]

I found this one while browsing last night:



It's from a Solo 1 at Mosport DDT earlier this year.

[gtpilot]

Lifting the inside rear isn't bad unless the opposite front corner is bottoming out the shock - that leads to an increadibly high spring rate for that corner and the car will push. The car will enter the turn very nicely and as the g forces increase and the body rolls further, the shock bottoms and suddenly you have mid turn push...I found out the hard way at MO many years ago... ...

Kirk

[Greg Gauper]

Kirk,

That sounds like one of those weird situations that Carrol Smith described in which the (counter-intuitive) fix is to increase the spring rate/roll stiffness at the front end of the car to reduce understeer

I had a similar problem at Gratten years ago with hitting my front bump stops, causing instant understeer in one particular corner (plunging off camber downhill entry with a sudden uphill exit....fun corner )

A 1/4" increase in front ride height was all it took to fix the problem. (I don't like running without bump stops since that is kinda hard on the struts if you do bottom out).

[gtpilot]

Greg,

That was the only choice we had that year at the Runoffs - raise the car up a little bit...also good to see that someone else reads the Carroll Shelby series of books! I need to get them out again, it has been a while since I have re-read them...

I also should have been clearer when I said "bottom out the shock"...I won't run without bump stops! Shocks are too expensive to ruin!! I didn't want to convey, or condone, running without them.

Kirk