I've had my '84S (103,000 miles) nearly 3 years and its low ground-hugging stance was one of the things that I found most attractive. Of course, driving Texas back roads meant dodging lots of dead critters, and speed bumps and steep driveway aprons often meant creative approaches to avoid scraping the chin spoiler. After reading other posts on this subject, I realized that I was obviously in need of a ride height adjustment. I was particularly motivated by Wally P's comments about "freshened appearance and improved ride".
I started by making a homebrew height gauge out of two overlapping lengths cut from a new paint stirrer stick, held together by a small spring-steel paper clip (works great!) and then measured using a vernier caliper. Front measured 124mm & 131MM, rear - 144mm&146mm. At my local Home Depot, I found a vise grip with "C" clamp jaws that fit the ~3.5" nut. Using the "8 turns = 1" of lift" formula, I jacked-up the car, removed each wheel and cranked in the prescribed number of turns. After a 30 minute run down a local bumpy dippy road, I re-measured, made a few adjustments and took another bumpy test drive. The end result is 164-165mm all around (still a little below factory specs).
Wally's right, it does look fresher...and it does ride better! As much as I increased the height, I suspect it needs an alignment, though steering and handling seem fine. I'm expecting to put on new tires in November. Then I'll adjust it to 170mm and have Zim's (Irving, TX) align it.
The new height seemed odd at first, but now feels and looks good. The ride is more taut, but less harsh over expansion joints and the perpetual resurfacing activity we endure on DFW freeways. Thanks to all those who, in previous posts, provided helpful info on this subject.

 

Yep, you have seen the light......just like most others who have done it.

Yes, you will need the alignment.......as toe will be way out of spec until it is done......good job!

 

Mine was at 122mm and it's a miracle I didn't break off the ac compressor. The natural instinct is to hit the brakes on approaching an unexpected dip or bump - which only makes it worse. I'm near factory spec ride height now which felt weird at first - like driving on tippy toes. I'm sure Zims will do a good job. Many NTB tire stores now have the Hunter DSP400 alignment machines and can align your car without lifting it. I paid $89 for a 4 wheel alignment and 20k miles later the tires are wearing evenly. Raising the height as much as you did means you have severe toe misalignment now which will chew up your tires very quickly.

 

What suspension combination and modifications did you have that got it so low?

 

GlenL,
I am the 3rd owner. I work with the PO (who had it from 1989 to 2000) and he says he never touched the suspension. I doubt that the original owner cranked it down. I suspect the low height was the result of settling and spring weakening, which others have written is somewhat normal.

 

I checked mine yesterday and rear were 173 mm.
But front were only 154 mm :-( .
This is with new shocks, talking about sagging springs.
No adjustment possible on my car in the front.
Had the car aligned this morning and it feels great.
Adding adjustments to the front will be another winter project.