Does the Z have a rear toe-steer problem?

Guard Dad · 01-25-2012, 09:48 PM

Quote:

Originally Posted by kenchan

ha!

softening the rear damp rate will not help, actually will make it worse.
swaybars will not help in this case either.

it's completely related to the amount of stroke, toe-in angle on the rear, and damp rate. ive already experimented with this on my G35C and it's got a similar suspension geometry. it's a programmed design of this kind of suspension. i already mentioned on my earlier post on how to reduce this feel.

this is another reason why im not running lowering springs on stock dampers.

Is more toe going to eat the rear tires, or do you just bias it to the factory maximum spec for toe in? Whose dampers do you like?

kenchan · 01-25-2012, 10:01 PM

Quote:

Originally Posted by Guard Dad

Is more toe going to eat the rear tires, or do you just bias it to the factory maximum spec for toe in? Whose dampers do you like?

more toe-in condition (0.40 total) will eat at your tires, but it will improve straight line stability for sure. but stiffer dampers will net your a lot more on this type of suspension.

on stock springs i think im going to be okay with koni yellows which are only re-bound adjustable (yellows are usually only re-bound adjustable and i am assuming the same for the 370Z's set). unfortunately this is the only damper set currently available for the 370Z that i know of. my only other alternative would be to get coilovers with near stock spring rate, linear rate springs, and keep stock ride height, use the adjustable damp settings to tighten up a little bit.

if im running progressive rate lowering springs i would prefer to have simultaneous adjustment dampers for street (bound and rebound stiffens together like my tokico D-Specs on the G...but not available for the 370Z). my goal would be to minimize suspension movement since it's already sitting near the outer stroke range of the stock suspension from the lowering springs... sacrifice would be some ride comfort. tires are eating pretty quick but i was able to get ~10K with sprited driving on RE050A PolePositions so that's not bad at all (currently running the new S04 PolePositions

).

Guard Dad · 01-25-2012, 10:20 PM

Quote:

Originally Posted by kenchan

more toe-in condition (0.40 total) will eat at your tires, but it will improve straight line stability for sure. but stiffer dampers will net your a lot more on this type of suspension.

on stock springs i think im going to be okay with koni yellows which are only re-bound adjustable (yellows are usually only re-bound adjustable and i am assuming the same for the 370Z's set). unfortunately this is the only damper set currently available for the 370Z that i know of. my only other alternative would be to get coilovers with near stock spring rate, linear rate springs, and keep stock ride height, use the adjustable damp settings to tighten up a little bit.

if im running progressive rate lowering springs i would prefer to have simultaneous adjustment dampers for street (bound and rebound stiffens together like my tokico D-Specs on the G...but not available for the 370Z). my goal would be to minimize suspension movement since it's already sitting near the outer stroke range of the stock suspension from the lowering springs... sacrifice would be some ride comfort. tires are eating pretty quick but i was able to get ~10K with sprited driving on RE050A PolePositions so that's not bad at all (currently running the new S04 PolePositions

).

Regardless of toe in or toe out, firmer shocks would reduce suspension travel and minimize undesirable toe changes,

ChrisSlicks · 01-26-2012, 06:15 AM

Quote:

Originally Posted by Guard Dad

Regardless of toe in or toe out, firmer shocks would reduce suspension travel and minimize undesirable toe changes,

Firmer suspension will reduce the bump steer but will increase the bounce on very sharp bumps. How many miles on your tires? Might be time for a good alignment.

Guard Dad · 01-26-2012, 11:18 AM

Quote:

Originally Posted by ChrisSlicks

Firmer suspension will reduce the bump steer but will increase the bounce on very sharp bumps. How many miles on your tires? Might be time for a good alignment.

5K on the the original tires, the wear pattern is near perfect, no irregular wear.

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