[anthonymaher]

I am fascinated by the suspension and drivetrain in my 968, and I am looking for some insight on the "ride height adjustment" on my M030 suspension: As I am working through basic suspension maintanence, I can tell that the shocks have never been adjusted based on the amount of gunk on the shock threads.



If my car is a daily driver,(not a track car), does it matter? If I were to lower (or raise) everything by 25mm, would I notice a difference--- and is that only based on changing the center of gravity? If that is the case, I am assuming that optimal height would be as low as possible without tire/wheelwell conflicts. Lastly, is there a baseline height that I should be referencing?



Sorry for all the questions!

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[bombfactory]

If you have an M030 car, it should already be set at the 'correct' height. I forget, but Flash can tell you what the measurements should be at the top/center of each fender well. Remember, you want to set your ride height with you in the car. I had initially set mine too low (found some M030 struts on eBay) and Flash fixed me up.



-Austin

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[Eleasar]

Hi there

 

I would love to know the original ride height from the M030 968. The car I bought was lowered and I want to have it all back to stock, as it came with the M030 option I would really like to know the original height of the car. Does anyone know it here?

 

Thanks a lot

Philipp

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[Rap]

Talk to Pete at RS Barn.

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[unknown4u]

The settings you can find in the original factory repair manuals. Mine is lowered as well. And it improve the ridings from stocksettings.


Only bumps/topas are harder to take.

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[unknown4u]

Page 44-2 and 44-3 from the workshopmanual
The page
Again.

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[Cloud9...68]

Ritchie,

 

Thanks for posting the page out of the workshop manual that describes the ride height measurements.  And specifically, for anyone interested in checking and/or changing their ride hieght, take note of the procedure, as it isn't exactly intuitive.  For the front, measure from the head of the bolt securing the caster block to the chassis to the ground (if you have the D1R lower brace, add the thickness of the bracket to your measurement), and the height from the center of the wheel to the ground, and subtract the former from the latter.  At the rear, it's the difference between the distance from the center of the wheel to the ground, and the distance from the center of the torsion bar carrier (that tube-shaped that protrudes out laterally a few inches in front of the rear tire) to the ground.  So it isn't quite as simple as slapping a tape measure against the fender wells and measuring to the ground.

 

As long as the OP doesn't plan to track his car, and only wants to lower it a little bit, he should be fine.  But if he ever wants to track the car, and wants to lower it significantly, he needs to get a PhD in mechanical engineering first, as things get incredibly complicated in a hurry.  Lowering the center of gravity is a good thing, but lowering these cars has other consequences that open a huge can of worms.  It can all be compensated for, but not without delving deep into the dark world of instant centers, roll centers, roll couple lengths, suspension frequencies, the impact all this has on front-to-rear roll stiffness, etc.

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[RS Barn]

the MO30 suspension doesn't like to be lowered too much. The front struts have adjustable spring height with threaded collars. The rear springs are fixed. So to lower the car equally at each end, you need to lower front via spring adjustment and rear by spring plate adjustment. This pre loads the rear springs, which tends to kick the rear end over tiny bumps. If you are going to lower I would only suggest about 10mm.

The fix is to replace the rear shocks with a threaded body shock. Then you can lower approx. 20-25mm. That is maximum I'd recommend for street use

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[unknown4u]

You are completly correct. Mine is lowered and it took me a lot of time to do it correct with the adjustable springs and plate as well. I also weighted each corner. The car bumps a bit on tiny bumps. But I Do not have the energy to change it again.


But hey compare to a stock 68 the maximum height of the car is low..

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