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Alignment numbers and some suspension Q's

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Old Nov 7, 2012 | 01:21 AM
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From: Lorain Oh
Alignment numbers and some suspension Q's

OK this maybe a lil long but figured it was better than multiple threads. car is an 88 gxl with the aas long gone by a previous owner.

First off I had an alignment and just the toe in front was changed and got the numbers and there are a few things that bug me. driver camber was -.4 degwhich sounds ok but passenger side had +1.3 deg. I know you can rotate the mounting block to ad negative camber but they are not origional blocks and look be centric unlike the stock block, is there anyway to maybe measure up the block to find out?

Second is the camber and toe of the rear. the driver side camber is -1deg and the passenger side is +.1 deg. driver toe .7 deg and passenger is .21 deg. the fsm say to adjust toe by rotateing a cam plate on each side, but the image is very vague. so where is the cam plate located on the suspension. Is the only way to adjust the camber of the rear is with a camber link or what ever its called, and why would the camber be that positive on one side, i would think if the strut and spring were worn it would cause neg camber.

the final thing is the ride height. The front looks to be ok but the rear looks to be pretty high especially compaired to the front. FSM says to measure the height from the center of the wheel to the bottom of the fender brim. does any one got the height for the front and rear or could meassure the height with stock suspension? struts look to have been replace at some point in its life.

Thanks in advance.

Last edited by slayne; Nov 7, 2012 at 01:24 AM. Reason: additional info
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Old Nov 7, 2012 | 11:52 AM
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From: https://www2.mazda.com/en/100th/
just going down the list, the strut tops eccentricity can actually be seen if you look at it from the top, the strut is off center. i'd be surprised if there was an aftermarket part available...

since the camber on the drivers side is fine, and its not on the passenger side, i would actually look for bent parts. the rear camber is usually not equal, but yours is off quite a bit, its unusual to see positive camber in the rear at all, the spec is somewhere around -1 for anything up to mid 91, and then its -.5

the toe adjusters in the rare are at the front of the trailing arm, or where the trailing arm bolts to the subframe.

stock ride height is about 1" higher in the rear than the front. i usually measure from the top of the wheel arch to the ground, which means that the wheel and tire matter, but my stock 87 GXL was about 26.5" in the front and 27.5" in the rear, from the ground to the top of the wheel arch with stock wheels and tires
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Old Nov 7, 2012 | 01:52 PM
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From: Lorain Oh
Thanks, the block mounts are clearly centric are obviously not stock. I can see it in the stock blocks but was afraid these didnt have the stock adjustment. the goodthing i guess is i noticed a small rubber **** on the block and the side that the camber is fine is on the centered and towards the fender and the passenger is on the engine side. im hoping that has something to do with the issue, but again they are nowhere near eccentric like stock. I may post the pics of the block when i get home.

Ill also check for anything bent in the rear, but the car is accident free and is straight. The lateral link controls camber correct? I know the subframe link is used to adjust both sides equally and they do sell individual adjustment links for each side.
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Old Nov 7, 2012 | 02:29 PM
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camber isn't really adjustable in stock form front or rear except for spinning the top strut mount up front.

The lateral link is there to control toe change.

the rear ride height greatly changes camber, is the ride height the same left to right?

I'd like to see a picture of the front top strut mount.
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Old Nov 7, 2012 | 06:28 PM
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From: Lorain Oh
ok measured out the ride height and i got these measurements.(its not on stock wheels and tires stock diamiter is 24.68 and these are 25.07) both sides of the front were 25 3/8 in. it looks almost as if the fronts been lowered about an inch, if it matters the aas has been removed and im assuming just some stock replacement struts and springs. then theres the rear. driver side measured 26 1/4 and the passenger 27 1/4. so something is going on with the passenger side of the rear. I got home too late to crawl under and see if i can find anything bent. if i cant see anything obviously bend what can i start measuring to find whats the issue, anything specific i should focus on? sub frame, trailing arm, strut anything else?

I snapped a few pics of the mounts, when lookig at them they dont look eccentric but in the pics they do. I dont think they are stock because the small rubber **** that indicates where the the adjustment for the camber is, is not inline with a bolt, but rather is between 2 bolts. you can see it in the passenger side mount better. and is in the same orientation as the driver side where as it should be facing the opposite direction.

fist pic is the driver side, second is passenger side, and third is the alignment specs.
Attached Thumbnails Alignment numbers and some suspension Q's-driver-mount.jpg   Alignment numbers and some suspension Q's-pass-stut-mount.jpg   Alignment numbers and some suspension Q's-imag0474.jpg  
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Old Nov 7, 2012 | 07:42 PM
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they are stock shock mounts.
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Old Nov 8, 2012 | 12:40 PM
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From: https://www2.mazda.com/en/100th/
those are the stock mounts. if the ride height is off by like an inch in the rear something is going on, that needs further investigation. i forget if there is a spec for that, but on the Rx8 its 10mm max variance side to side.

i would spin the RH strut top too, its in the max positive camber position.
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Old Nov 8, 2012 | 01:52 PM
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From: Lorain Oh
Yeah im gonna rotate the mount, i thought the rubber knub on the mount was suppose to be in a different location. as far as ride height is concerned the passenger is about the stock height from what j9fd3s measured and +.1 camber doesnt sound like a lot and should not wear the tire crazy fast , right? Now im thinking that the driver side is just sagging, maybe a strut or spring issue?
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Old Nov 9, 2012 | 11:03 PM
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+.1 camber isn't too bad, but it is a quarter degree out of spec. Rear should be from -1.25 to -.25. Is that third picture your final specs? Your rear toe is pretty terrible.

The front camber is a bit concerning. That much cross camber would definitely contribute to a pull.
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