What else causes understeer?

I have read that to get the best out of the 348, you need to change all four tires simultaneously. Maybe that is your issue as you have different tread levels front and rear.

 

There are some old TR threads where the 512 crowd had to add some weight in the front trunk as a temporary cludge to reduce understeer.

 

Could be. Could also be a toe-in/toe-out or caster setting that's out of whack.

 

+1 my vote = toe in

 

Vince...come on by...I'll be in the garage all day with my 348 engine out and trying to build a seatbase to run a race seat in my Z06 since the Ferrai is off line and I want to do the tribute to lemans at WSIR. Email me [email protected] for directions to my house.

 

Many of these cars have been nose raised because they scrape everywhere. This can cause understeer and high speed float/wander. Transient understeer usually means loose/worn parts/mushy suspension/bad shock for example. I bet I could align it by eye and make it better

 

Exactly. Understeer you have not enough front grip or too much rear grip. Before you go change the alignment and create oversteer (be careful more of a handful on the road) you may want to get new front tires. That will increase grip and lessen understeer. Even if the tread is not terribly worn the rubber will get harder with age. Search past threads. There was a discussion on changing only rear tires on the 348 and how it made the car unstable. Although it would seem like you save money because the rears wear faster, the consensus is that it upset the balance of the car by only changing rear tires.

You can get into increasing toe in and camber on the front but you will also increase tire wear. Softer front sway bars with decrease under steer. Again be careful. Anything that increase grip on the front (reduces understeer) will increase oversteer which is much more dangerous on the street.

 

When's the party start?

 

Dead on......if you are running stock wheels..NO spacers...and stock tire sizes, set the car alignment and ride height to factory setting....this should establish a fixed starting point. If you are running new rears and old fronts there could be a difference with the way the rear and fronts are heating up under lateral load(i.e. cornering....new rears having full tread[hotter] and used fronts[cooler]...like having a shaved tire) which will can cause a sudden stick on the fronts as temps rise, usually about halfway into the turn. Worn a-arm,shock absorber, and sway bar bushings could possibly cause this and is pretty easy to check when car is on jack stands.

 

Not yet having decent carpets?

 

Maybe if you can co-ordinate with a local brother, you could try out his tires (assuming all four are of a similar age) on your car. Go for a drive and see if you face the same understeer issue. If the tires dont make a difference then alignment would be the area to focus on. Otherwise a matched set of tires are your answer

 

Try Chris - I am sure he is busy with his Porker. He wont notice 4 tires missing in his 348

 

Now that's pretty funny....

 

LOL Chris must be out with the beast as we speak .

 

I believe he may be or was just a bit "wound up" from the W/E.

He has not yet replied to me today!

I would take his tires.

 

Vince...did you notice the tire changer in my garage, the 20 extra tires, the 4 extra OEM wheels on the trailer and the 4 challenge wheels with slicks next to the welder? Which ones do you want to try?

 

It's good to have good friends!

 

I think the proper term is "Water Buffalo"

 

Vince while you are at FBB's place, pile on some liquor and lotsa food to FBB and make him sell his challenge wheels to me for $50.

 

+1.....wish I lived next to FBB