Say that your car (like my 996 GT3)has approximately a ratio of weight 35% front 65% rear?Is it possible thru corner balancing to change that somewhat (don't believe you could do much) so you had more weight on the front to help turn in and I suppose end up with a"livelier " rear end ?
Is this considered an attractive idea?TIA HOM

 

To achieve that, you would need to move the center of mass forward in the car. Either lighten the rear, or weight the front. It can't be done with height adjustment.

 

You can only do that for one front wheel vs. the other. So if your're running ovals, you could make your RF wheel weight match you RR weight, but the car would only turn left, and the LF wheel would about be off the ground. The short answer is no. Corner weighting only works in diagonals.

 

I know a Guy... local... a selection of box end wrenches, ball of string, a jack and some citrus hand cleaner. He can help.



Cheers

Matt

 

Sure you can. Increasing rake will move some weight to the front wheels but then you introduce other issues.

 

You talking about me ???

Cheers
Phil

 

I believe the saying is "if the shoe fits"

 

Common misbelief. I am an engineer and I did the math, if you raise a 911 a foot on one end it barely moved the c of g and barely any weight moves front to rear. As said above you need to move ballast or parts of the car to change weight distribution.

 

I agree that especially on a 911 the effect is very small but it does move some.

 

Love you like a brother!



See you soon.

Cheers

Matt

 

Jack Olson moved his engine and trans forward 1", if I'm not mistaken.
-C

 

THAT will work, as it moves the c of g forward. It's easy to calculate the ft/rear distribution, as only the C of G point is needed. That does not really move forward or backwards when you raise an end of the car unfortunately. But changing the ride height a bit on a 911 changes handling a lot because of the suspension geometry.

 

Moving the engine forward causes other problems. Most notably, the drive shaft angle gets worse so you trade off moving the cg forward with being able to lower the cg. I'd rather lower the cg.....

 

So, is that the answer to the question I WAS going to ask, which is: How/why does rake affect handling?

I lowered my front by 4 turns at Road America to get rid of some push last fall and it seemed to work... but then I had a mechanical and crashed, so haven't been able to finalize my conclusion yet.

This (the perceived improved handling, not the crash) could have been due to increased toe out and camber, but what about rake itself?

 

How far up is the cg from the bottom of the unibody?