Lowering the Rear

[Hamza]

Hey so I bought my '13 86 off of a guy who had the stock coils chopped, and it has aftermarket wheels. I bought Tein advance Z's so I can adjust but now I'm having issues on the rear.

1. I remember reading somewhere that the rear cannot be lowered more than 1.5" from stock in the rear before you get into territory of risk breaking the dif axle connection. Is this true? I'm trying to ever avoid the need of any dif risers of some sort.

2. Now if I need to stay within the 1.5" range, how do I measure the height to compare to stock?? As in, the wheels have an effect on the height so I'm confused that I can't just compare directly?

Any help would be greatly appreciated

[marco_mc22]

Rear stock from hub center to fender is 372mm (14.6in) with gas filled up and spare tire in, I wouldn’t lower the rear more than 1.4in

[Hamza]

Originally Posted by marco_mc22

Rear stock from hub center to fender is 372mm (14.6in) with gas filled up and spare tire in, I wouldn’t lower the rear more than 1.4in

What if I don't got a spare tire

Was just thinking shouldn't the center of the hub stay the same regardless of the wheel and I just measure that to the fendor?

[Turdinator]

Originally Posted by Hamza

What if I don't got a spare tire

Its still gives you a max low point to use.

Originally Posted by Hamza

Was just thinking shouldn't the center of the hub stay the same regardless of the wheel and I just measure that to the fendor?

Yes, that is why he gave you that dimension and why its generally used to determine ride heights.

The lower you go the quicker you will wear out the CV joints in the rear axle and obviously the worse the car will deal with bumps. Are you racing the car or more of a cruiser or daily driver? Are you on stock or near stock power?

[Hamza]

Originally Posted by Turdinator

Its still gives you a max low point to use.


Yes, that is why he gave you that dimension and why its generally used to determine ride heights.

The lower you go the quicker you will wear out the CV joints in the rear axle and obviously the worse the car will deal with bumps. Are you racing the car or more of a cruiser or daily driver? Are you on stock or near stock power?

Ahhhhh sorry my bad I read it as thinking he meant put the spare tire instead of my wheels and measure. But makes sense, thank you very much!!

And I'm practically stock power. When I bought the car it had a widebody on and I just wanted to get rid of as much fendor gap as I could (I'm not slammed in any way). I sort of daily it, but it's honestly a max of a 20 minute drive a day. Not racing on it.

[Turdinator]

Originally Posted by Hamza

Ahhhhh sorry my bad I read it as thinking he meant put the spare tire instead of my wheels and measure. But makes sense, thank you very much!!

And I'm practically stock power. When I bought the car it had a widebody on and I just wanted to get rid of as much fendor gap as I could (I'm not slammed in any way). I sort of daily it, but it's honestly a max of a 20 minute drive a day. Not racing on it.

Keep in mind the wide body might change the fender height.

Honestly if you are daily driving it just lower it until you are happy with the look and call it a day. Personally I would try and keep about 2 fingers gap from the top of tire to the fender tho. And make sure you get it aligned asap after you have settled on a height.

[Hamza]

Originally Posted by Turdinator

Keep in mind the wide body might change the fender height.

Honestly if you are daily driving it just lower it until you are happy with the look and call it a day. Personally I would try and keep about 2 fingers gap from the top of tire to the fender tho. And make sure you get it aligned asap after you have settled on a height.

Noted! Appreciate it!!

[Hamza]

Originally Posted by Turdinator

Keep in mind the wide body might change the fender height.

Honestly if you are daily driving it just lower it until you are happy with the look and call it a day. Personally I would try and keep about 2 fingers gap from the top of tire to the fender tho. And make sure you get it aligned asap after you have settled on a height.

Okay I've been fiddling with it and trying different thing but now the confusion has come again.

On the Tein specs, it says the max rear drop is 3". I measured before changing anything and I was at 37 cm from hub to fendor. I've dropped the coil as much as I could in a safe region, but now it's at 2 cm from being completely bottomed out, however the distance from the hub to fendor is still 36ish cm. The numbers don't add up because if I drop 2 cm more (bottom out the coil) I'll be at 34 cm, which isn't nearly 3 inches that the coil is capable of.

[x808drifter]

Dumb question.
These have all been measured with the car on the ground right?

Please provide pic of what you have it set to.

[Hamza]

Originally Posted by x808drifter

Dumb question.
These have all been measured with the car on the ground right?

Please provide pic of what you have it set to.

Yeah yeah ofcourse it's measured with the car on the ground. I can't take a picture right now but I'll attach what I measured. Before the coils that was at about 370mm and now after dropping the coil to only 2 cm of threads left, it's at 360mm (so changing the coil threads by about 3 cm only changed 1 cm of ride height). I'm really curious to what the 3" measurement Tein says of max drop but it doesn't seem like these coils go far enough to break axles?

[Turdinator]

Originally Posted by Hamza

Yeah yeah ofcourse it's measured with the car on the ground. I can't take a picture right now but I'll attach what I measured. Before the coils that was at about 370mm and now after dropping the coil to only 2 cm of threads left, it's at 360mm (so changing the coil threads by about 3 cm only changed 1 cm of ride height). I'm really curious to what the 3" measurement Tein says of max drop but it doesn't seem like these coils go far enough to break axles?

Is that lowering the spring perch, the mounting point or both?

[x808drifter]

Originally Posted by Turdinator

Is that lowering the spring perch, the mounting point or both?

This is why I want pics of the suspension.

[EndlessAzure]

@Hamza Does the installation manual have a reference on how to set-up the preload and height adjustment collars to factory recommendation? If there are, it will also tell you where the car will sit relative to stock when set-up according to the recommendation. This will be part of the total drop the coils are capable of.



Then, you can adjust from there using the lever ratio (1:1 in the front, 1:1.3 in the rear)

[Hamza]

Originally Posted by Turdinator

Is that lowering the spring perch, the mounting point or both?

The spring as far as I know