Kinematic - Hocus Pocus?
09-13-2013, 01:03 PM
#1
RL Community Team
Rennlist Member
Rennlist Member
Thread Starter
Kinematic - Hocus Pocus?
I always wonder if the kinematic adjustment is needed with every alignment. I understand the need if the struts or springs are changed causing height of the suspension changes but for general alignment is it really needed? I understand newer Porsche vehicles have the same suspension layout without the adjustability. I have learned that the adjustment may have been designed for a future state where the car would have 4 wheel steering and the kinematic setting would be adjusted dynamically on the fly. I also heard in the pre-electric 1990's suspension world the vendor quotes to engineer this were too expensive so it was not implemented.
Your thoughts?
Andy
Your thoughts?
Andy
09-13-2013, 01:07 PM
#2
Rennlist Member
Short answer - yes.
If you make any adjustments to rear camber you should recheck kinematic. Small adjustments to rear toe generally won't affect kinematic.
This is one of those "if you're going to do it, do it right" things.
If you make any adjustments to rear camber you should recheck kinematic. Small adjustments to rear toe generally won't affect kinematic.
This is one of those "if you're going to do it, do it right" things.
09-13-2013, 04:45 PM
#3
Race Car
+1, Any time you touch rear camber you must check KT.
I have fixed some mistakes made on a friends car where the alignment shop put 13mm of toe-in on each rear wheel (26mm toe-in total) instead of 13min's of toe. I checked the KT prior to making adjustments and after and there was no change in the balance ie, it remained the same left to right with only a half make movement of the bubble on the gauge.
I have fixed some mistakes made on a friends car where the alignment shop put 13mm of toe-in on each rear wheel (26mm toe-in total) instead of 13min's of toe. I checked the KT prior to making adjustments and after and there was no change in the balance ie, it remained the same left to right with only a half make movement of the bubble on the gauge.
09-13-2013, 09:00 PM
#6
09-13-2013, 10:52 PM
#7
I have fixed some mistakes made on a friends car where the alignment shop put 13mm of toe-in on each rear wheel (26mm toe-in total) instead of 13min's of toe. I checked the KT prior to making adjustments and after and there was no change in the balance ie, it remained the same left to right with only a half make movement of the bubble on the gauge.
that is just beyond classic!
in the changes I've made to rear camber the kinematic was always affected.
I can't use the bubble on my coupe but the difference in 2 and 5 arm angle side to side was pretty big for a camber change of -3 to -2.6.
I don't know how big the difference can be until it matters.
the good news is stock or after market arms, kinematic is easy to adjust.
