Nissan 370Z Forum - Swift Springs // Problem with Alignment

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- - Swift Springs // Problem with Alignment (http://www.the370z.com/brakes-suspension/52203-swift-springs-problem-alignment.html)

Quote:

Originally Posted by MJB (Post 1629488)

^Huh? Toe does affect the way the vehicle handles....

This article came from AA1 auto repair and discusses alignment characteristics and why a vehicle may be pulling to the right or left....

" The underlying cause may be rear toe out of specifications, a bent rear axle, chassis misalignment or a stackup of assembly tolerances in the chassis causing rear axle misalignment. Measure and compare the wheelbase on both sides, check for the presence of a thrust angle, and/or measure individual rear toe. Correct by realigning the rear axle or rear toe, or by performing a thrust angle alignment"

If one rear wheel has some "toe in", and the other rear wheel is has some slight "toe out", the car is going to be all over the place. I'm thinking that is probably whats wrong with the OP's alignment. Plus since he said he installed a camber kit, I'm assuming the alignment techs were able to get the camber back to specs, however he didn't say anything about new toe bolts.

Or they could have gotten the correct toe but the camber is way out of specs.... We really need to see the his alignment sheet to see whats going on

Rear toe does not cause pull. Rear toe is responsible for the thrust angle which then your front wheel toe is adjusted to. In your specific example of one wheel toe in and the other toe out, this will just cause the rear end to be off to the side. There is even a specific name for this called dog tracking because it is just like some dog that walk with their rear end to one side while going in a straight line. Think about it, if you set the LR wheel toe in and the RR toe out and then the front gets adjusted to that (this is why rear toe is adjusted before front toe) so your LF also gets toed in and your RF gets toed out because front toe is set from thrust angle which is determined by rear toe (compared to true vehicle center). Now your vehicle will go in a straight line with the steering wheel being centered all the while you’ll be looking through your side window as your windshield.

SPL rear camber arms installed, two new rear tires, and an alignment.

Does the alignment look ok to you all?

I mean looks good to me.
I'll be doing the same mod. No coils yet. #brokelife problem

So here I am 8 months later and around 6k miles and I need new rear tires again. Inner tread is just wearing down. Alignment looked good to me.

Any suggestions here folks?

post alignment specs

i hope you are not literally relying on how it appears visually

if you did not get a lockout kit, your eccentric bolts may also become loosened

Quote:

Originally Posted by TacoSport10 (Post 3988901)

So here I am 8 months later and around 6k miles and I need new rear tires again. Inner tread is just wearing down. Alignment looked good to me.

Any suggestions here folks?

You could take some camber and toe out. Camber from -1.69 to -1.40. Toe from 15* to 9*.

Quote:

Originally Posted by OptionZero (Post 3988923)

post alignment specs

i hope you are not literally relying on how it appears visually

if you did not get a lockout kit, your eccentric bolts may also become loosened

My alignment is a few post up from 7/29/20 (#32). I’m not the most mechanically inclined, but I would go off more than visual! Lol

I upgraded to the SPL rear camber arms and Z1 eccentric elimination kit ( https://www.z1motorsports.com/z1-pro...t-p-11977.html ). Looks to be the same as the lockout kit? But looking back it looks like I only ordered the camber bolts and not toe.

I saw that alignment, but that's why i inquired about the lockout kit

Quote:

Originally Posted by OptionZero (Post 3988975)

I saw that alignment, but that's why i inquired about the lockout kit

I'm hoping alignment got knocked out somehow and that's why I didn't get much out of this set of rear tires. I went ahead and orderd the eccentric bolts from ZSpeed for the toe (already have them for the camber). And spoke to Joe who gave me some suggestions on how to have them setup the alignment.

Quote:

Originally Posted by Rusty (Post 3988924)

You could take some camber and toe out. Camber from -1.69 to -1.40. Toe from 15* to 9*.

That's very close to what Joe said as well. Basically the combination of the camber and the toe is a tire killer. He suggested getting the toe as close to .18 total as possible.

Quote:

Originally Posted by TacoSport10 (Post 3988978)

ok so there is the disconnect

you only had camber lockout, no toe locckout

so your toe might not actually be what that alignment from months ago says it is

but this is why i tell everyone to replace every arm with SPL adjustables, lockout everything, and get coilovers. max adjustment, no slip

Quote:

Originally Posted by OptionZero (Post 3988993)

Very well could be the toe became way out of alignment. I’m an electronics tech, not too much on mechanical. Didn’t realize I should have done both.

I was planning on coilovers this year, and may still be able to.

anything factory is prone to slippage, nissan did not do us any favors from a handling adjustment standpoint