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SPECIAL Stiffer shocks &"Jack-Down" valvings
These charts represent some typical damping curves used on the RF of an Asphalt LM car when used with very soft front springs so the front end “jacks down” for dramatically altered aerodynamics and down-force characteristics.
This is a special STIFFER shock ("-10 suffix"). These settings are developed to have very stiff rebound & very soft compression forces - about 2-1/2 times that of “standard” MagneShocks.
Note that the Programmer's LEDs roughly display ACTUAL damping forces for a "-20 suffix" shock.
This special "-10 suffix" shock gives about 2-1/2 times the values displayed [EX: 320 on display will give about 800 lb of damping force].
The usual Programmer settings (#394 below) are (Reb/Comp):
Velocity: 0 ½ 1 3 7
Settings: 60/16 180/16 190/17 240/26 320/36
In some cases you will find bumps on the track in the corners.
When this occurs, a shock with this much rebound has a tendency to make the car JUMP OVER about 1 or 2 lanes.
The bump causes the wheel can go up farther & faster and will require the shock to extend very quickly if the tire is to follow the track and maintain traction.
In fact, the shock cannot possibly rebound fast enough against so much resistance (damping), so the wheel “leaves the ground," loses traction and the car skips over.
MagneShocks have some UNIQUE Force-Velocity capabilities:
They can be adjusted so the damping force is REDUCED at higher velocities so it CAN rebound faster & possibly reduce or eliminate this skipping.
This 1st chart shows:
1. The CONVENTIONAL valving/settings (BLUE #394)
2. A setting (ORANGE #395) where the Rebound force starts to REDUCE at 3 in/sec and has
dropped off by more than 70% at 8 in/sec.
Only the Rebound setting at 7 in/sec was reduced from 320 to 36
3. A setting (GREEN #396) where the Rebound starts to REDUCE at 1 in/sec and has dropped
off by more than 80% at 3 in/sec & stays low at all higher speeds. The Rebound setting at
3 in/sec was also reduced from 240/26 to 26/26.
This 2nd chart shows the same shocks in a TIME-FORCE relationship (each vertical division is about 0.025 sec).
You can see that the damping force of #395 (ORANGE) drops off for about 250 milliseconds (1/4 second) - only while the shock it moving between 3 & 8 in/sec.
The damping of #396 (GREEN) drops off much sooner and stays low for about 335 milliseconds (1/3 second) - only while moving between 1 & 8 in/sec.
You may have noticed a slight “spike” in the compression damping (above) when it first starts. This chart shows that it only lasts for 0.025 sec (1/40th of a second).
This 3rd chart is, perhaps, only a “demonstration” of the capabilities of MagneShocks.
We have taken the original shocks (#394 BLUE)
and modified it (#397 VIOLET) so the damping force REDUCES (starting at 1 in/s) to a low around 3 in/sec & INCREASES all the way back up at 8 in/sec. (at this time we have NO IDEA how you could use this unusual Force-Velocity curve - BUT, it sure is “interesting”)
MagneShock™ designs, tests, and manufactures active damping
suspension systems using Magneto-Rheological (MR) technology.
Contact us today to improve your product.