my jbody has alot of under steer - Suspension and Brake Forum

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my jbody has alot of under steer
Friday, February 09, 2007 8:03 PM
HOW DO I GET A LITTLE MORE GRIP IN THE FRONT FOR HARD CORNERING ........... WHAT PRODUCTS SHOULD I LOOK INTO OR ARE THERE ANY MODS I COULD DO!!!!

Displacement= 2.2L
Valve Train= OHV
Bore & Stroke= 3.50 x 3.46
Compression Ratio= 9 to 1
Net HP @ RPM= 125 @ 5200
Maximum Torque Ft Lbs @ RPM= 135 @ 4000
Fuel System= MFI
Normal Oil Pressure: psi @ 3000 RPM= 56

Re: my jbody has alot of under steer
Saturday, February 10, 2007 7:20 AM
front and rear sway bars
aftermarket springs and struts
bigger wheels
front and rear strut tower braces

thats a good start



Re: my jbody has alot of under steer
Saturday, February 10, 2007 7:38 AM
and dont ever forget the value of a good set of tires.



JBO Stickers! Get yours today!
Re: my jbody has alot of under steer
Saturday, February 10, 2007 8:17 AM
All said above is correct, but more directly to your question, understeer is a result of your front end being tighter than your rear.

The car was built this way on purpose, as understeer results in your car wanting to go straight. Safer under normal driving (average driver), especially in a panic situation.

Adding a rear sway bar will be the quickest way to reduce understeer.






Re: my jbody has alot of under steer
Saturday, February 10, 2007 12:31 PM
thanx for the info


Displacement= 2.2L
Valve Train= OHV
Bore & Stroke= 3.50 x 3.46
Compression Ratio= 9 to 1
Net HP @ RPM= 125 @ 5200
Maximum Torque Ft Lbs @ RPM= 135 @ 4000
Fuel System= MFI
Normal Oil Pressure: psi @ 3000 RPM= 56
Re: my jbody has alot of under steer
Saturday, February 10, 2007 1:57 PM
explain to me how bigger wheels will get rid of understeer please?




Re: my jbody has alot of under steer
Saturday, February 10, 2007 2:06 PM
USJDM.....GOT YA B!TCH! wrote:explain to me how bigger wheels will get rid of understeer please?


Wider would be the most help, less sidewall on the tire would help some too.. not too little though.



1983 Camaro Z28
Re: my jbody has alot of under steer
Saturday, February 10, 2007 5:30 PM
ling427ttvette wrote:
USJDM.....GOT YA B!TCH! wrote:explain to me how bigger wheels will get rid of understeer please?


Wider would be the most help, less sidewall on the tire would help some too.. not too little though.

Wider tires or lower profile tires will not change understeer, unless you're talking about staggered size, which makes no sense on a FWD car.

Understeer is because the suspension of the car is unbalanced, with the rear having more body roll than the front.






Re: my jbody has alot of under steer
Saturday, February 10, 2007 7:53 PM
Exactly, and to be honest a 16 inch wheel w/ an autocross tire will benefit you the most



Re: my jbody has alot of under steer
Sunday, February 11, 2007 7:36 PM
go 15s and get a fat autocross tire, more sidewall and the tire will have a stiffer sidewall which equals less flex and more grip





Re: my jbody has alot of under steer
Monday, February 12, 2007 6:53 AM
USJDM.....GOT YA B!TCH! wrote:Exactly, and to be honest a 16 inch wheel w/ an autocross tire will benefit you the most
<---Wow, lots of poor information in this thread. Autocross tires are not a viable street solution. Why would recommend a tire to someone that only lasts 10,000 miles or so? Bad idea.

You can add a rear sway bar to help balance the car out. It is probably the cheapest solution-- $150

If you had the money I would recommend a mild spring drop and nicer struts (KYB AGX's or something similar). This will make the care more neutral and you can adjust the strut settings in the front and rear to get the car to your desired handling. This would run you close to $500 though.




Re: my jbody has alot of under steer
Monday, February 12, 2007 1:37 PM
when i said autocross tire i meant something like the Falken Azenis RT615, its got nice life and great grip in cornering and such, i know ive had that and the older RT215 and they lasted me quite awhile, i didnt mean a strictly autocross tire like the Victoracer/V700/Advan tires for example.



Re: my jbody has alot of under steer
Monday, February 12, 2007 2:44 PM
DevilsSi1481 wrote:when i said autocross tire i meant something like the Falken Azenis RT615, its got nice life and great grip in cornering and such, i know ive had that and the older RT215 and they lasted me quite awhile, i didnt mean a strictly autocross tire like the Victoracer/V700/Advan tires for example.



exaclty...



Re: my jbody has alot of under steer
Monday, February 12, 2007 8:21 PM
Typical J-body.org advice....

A rear sway bar will make the car handle better than 2 Azenis' in the front and street tires in the rear. Azenis were not designed to be a daily driving tire. I seriously doubt you get over 10-15,000 miles on a set considering they are good for 1-2 autocrosses at most. Not to mention it would look stupid to have tires that don't match.

A rear sway bar is still the cheapest and best solution.



Re: my jbody has alot of under steer
Monday, February 12, 2007 8:22 PM
~ Autocross seaons not autocrosses



Re: my jbody has alot of under steer
Tuesday, February 13, 2007 5:23 AM
As mentioned, a rear swaybar is probably the quickest and easiest way to reduce the tendency for the car to understeer, but by getting stickier tires (a good set of performance summer tires) the car will hold on to the road better before losing grip and understeering.

It will still understeer when you break loose, but you won't break loose as early.

If your goal is to corner faster, I think better tires will give you more than the rear sway bar, but if you're looking to tune the behaviour of the car then the sway bar is a good first step.

Hell, get the sway bar regardless. They're cheap and you'll like it.




Re: my jbody has alot of under steer
Tuesday, February 13, 2007 12:01 PM
i never told the kid to just get 2 tires.....the main point of my post was to get everyone in here suggesting bigger rims w/ a tire that has a smaller sidewall to stop thinking like that. Bigger rims will not do anything, expecially seeing that a majority of the people here who get bigger rims get the cheapest thing they can find which normally means a heavy ass rim and a really @!#$ty tire.



Re: my jbody has alot of under steer
Tuesday, February 13, 2007 2:58 PM
i think i had about 30,000 miles on a set of azenis 215's , and alot of drag strip use


great tires







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