Nissan 370Z Forum

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-   -   too much understeer now! (http://www.the370z.com/brakes-suspension/27773-too-much-understeer-now.html)

vortrex 11-24-2010 12:13 PM

changed my tire pressures to 36F and 32R, what a big difference! no more bobbing in the corners. feels like it did when stock now.

travisjb 11-24-2010 12:28 PM

ahhhh... I think what you were describing then was turn in not understeer... higher front tire pressure is going to feel more "crisp" when you turn in, but not necessarily give you a greater lateral G before break-away nor tighten up slip angle

glad it's working out

Jessobear 11-27-2010 07:35 AM

I looked around and was never able to find the factory toe specs. What I was going to suggest is having the car aligned so that the front toe is towards the maximum end of the spec and the rear toe is towards the minimum end of the spec.

By the way, the factory tire inflation spec is 35 psi front and rear. Glad to hear the tire pressure changes helped.

Jessobear 12-07-2010 06:15 AM

Just in case you're still looking at this, I finally found the factory alignment specs.

Front:

Camber - -1.41 to 0.08 degrees (-0.67 nominal)
Caster - 4.42 to 5.91 degrees (5.17 nominal)
Total Toe - 0.04 to 0.11 inches (0.08 nominal)

Rear:

Camber - -2.16 to -1.17 degrees (-1.67 nominal)
Total Toe - 0.08 to 0.21 inches (0.15 nominal)

They list this spec as total toe in, but above on the rear you list split measurements for toe. So my interpretation is that you have 0.08 inches total toe in the front and 0.18 inches in the rear? If that's correct, since you have the minimum camber spec in the front and close to the nominal spec in the rear, I'd try decreasing rear toe to the nominal spec or slightly lower and see how things are.

djpathfinder 12-07-2010 08:20 AM

That's in degrees, not inches. :tup:

Jessobear 12-08-2010 01:05 AM

Quote:

Originally Posted by djpathfinder (Post 840410)
That's in degrees, not inches. :tup:

No, that's inches (if you're talking about toe). They did also list the spec in degrees and millimeters..


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