Shocks (dampers) and the AE86 (Part 1)
Posted: Wed Aug 27, 2014 3:51 am
The AE86 GTS left the factory with open type oil filled front shocks and KYB
gas filled rear shocks. These were quite well matched to the standard springs,
and gave a somewhat firm and sporty ride. Thirty years on the factory "stance"
of the car is not going to cut it with the current drift orientated image of the
AE86, so suspension upgrades are one of the first mods that the average
AE86'er will perform.
HOW TO GO LOW...
First timers (and I was one) want the car to be lower, and the easiest way to
achieve this is to get a set of "lowering springs". These are factory diameter
springs that will typically drop the car 1.5 to 2" (40 - 50mm) and have a spring
rate 25% higher than factory springs. NOTE: Cutting springs and other ghetto
mods will not be discussed in this article.
Your car will look better, handling will improve slightly, and the ride will be
pretty much the same as stock. However, 2" is regarded as the maximum
drop for standard length shocks. Anything more and you should be looking at
installing "short stroke" shocks.
WHY DO I NEED SHORT STROKE SHOCKS ?
When your suspension moves up (bump) and down (rebound) the shock
piston moves up and down inside the shock. The factory selects the shock
length to place the piston in about the middle of the shock travel when the
car is at rest. By lowering the car, the piston is now 2" further down the
shock, which reduces the available bump travel, and increases the chances
of the shock bottoming out when you hit a bump.
Bottoming out is not a good thing for handling, and can damage the shock.
So what we need is a shock with a shorter stroke (spear) to restore the
piston to around the middle of the travel. The other reason for installing
short stroke shocks is to make sure the springs remain captive at full droop.
SO, WHAT'S THE BEST SHOCK FOR MY CAR ?
You don't really think I'm going to tell you that... do you ? I will tell you that
the best shock is one that is the right length for your ride height; stiff
enough to control the springs you are using, and tuff enuff to stand up to
the kind of use intended. With shocks you get what you pay for... big names
like Bilstein and Koni work well, can be custom valved and repaired. WalMart
brands are factory replacements, and generally speaking, throwaway items.
See Part 2 for a bit of shock tech
Cheers... jondee86
gas filled rear shocks. These were quite well matched to the standard springs,
and gave a somewhat firm and sporty ride. Thirty years on the factory "stance"
of the car is not going to cut it with the current drift orientated image of the
AE86, so suspension upgrades are one of the first mods that the average
AE86'er will perform.
HOW TO GO LOW...
First timers (and I was one) want the car to be lower, and the easiest way to
achieve this is to get a set of "lowering springs". These are factory diameter
springs that will typically drop the car 1.5 to 2" (40 - 50mm) and have a spring
rate 25% higher than factory springs. NOTE: Cutting springs and other ghetto
mods will not be discussed in this article.
Your car will look better, handling will improve slightly, and the ride will be
pretty much the same as stock. However, 2" is regarded as the maximum
drop for standard length shocks. Anything more and you should be looking at
installing "short stroke" shocks.
WHY DO I NEED SHORT STROKE SHOCKS ?
When your suspension moves up (bump) and down (rebound) the shock
piston moves up and down inside the shock. The factory selects the shock
length to place the piston in about the middle of the shock travel when the
car is at rest. By lowering the car, the piston is now 2" further down the
shock, which reduces the available bump travel, and increases the chances
of the shock bottoming out when you hit a bump.
Bottoming out is not a good thing for handling, and can damage the shock.
So what we need is a shock with a shorter stroke (spear) to restore the
piston to around the middle of the travel. The other reason for installing
short stroke shocks is to make sure the springs remain captive at full droop.
SO, WHAT'S THE BEST SHOCK FOR MY CAR ?
You don't really think I'm going to tell you that... do you ? I will tell you that
the best shock is one that is the right length for your ride height; stiff
enough to control the springs you are using, and tuff enuff to stand up to
the kind of use intended. With shocks you get what you pay for... big names
like Bilstein and Koni work well, can be custom valved and repaired. WalMart
brands are factory replacements, and generally speaking, throwaway items.
See Part 2 for a bit of shock tech
Cheers... jondee86