2016 SM (Street Mod) Autocross Discussion
#211
Oh wow never heard of them but here they are,
http://www.ludicrousspeedshop.com/Featured.html
IMO, so many lost opportunities for improvements. They might even be lighter than mine but without working on roll center or bump steer fixes the benefits aren't huge.
http://www.ludicrousspeedshop.com/Featured.html
IMO, so many lost opportunities for improvements. They might even be lighter than mine but without working on roll center or bump steer fixes the benefits aren't huge.
#214
You know it
Ill have to double check weights after this final version is done but I think we're right around 5lbs lighter now each side. Added a little weight back on this latest version just increasing stiffness and strength, especially through the steering system. I widened the bolt mounting points and changed to M10s from M8s along with the greater bump steer adjustment on the burly arms. Ackerman remains stock unless someone really wants something different.
I don't see how/why the "other" designs out there get away with weak looking steering mounts. Beyond just the actual strength of surviving steering forces there's also being stiff enough to not be a soft spring in the system. It is just a cantilevered bar after all connecting to the wheel bearing through a torsion bar.
#216
There would be so many unnecessary sacrifices to make something like that work and the granularity in adjustment would be far too coarse. Considering the forces in an upright, it really needs to stay solid as much as possible in the core locations of load path which is basically steering to hub and ball joint to hub.
Would be much better to have that adjustment in the control arm itself which actually becomes a little tricky. How do you keep rod ends out of bending without creating a length change between the inner mounts when adjusting. Only thing I can think of is to either make them two piece and pivot at the connection point between two pieces have a portion of the load on the rear joint in bending. The latter also has clearance issues with the chassis right there.
These are just things Ive been noodling on for my next project. I really want adjustable control arms. Welded tubes is the easy path, but I have a CNC...
Would be much better to have that adjustment in the control arm itself which actually becomes a little tricky. How do you keep rod ends out of bending without creating a length change between the inner mounts when adjusting. Only thing I can think of is to either make them two piece and pivot at the connection point between two pieces have a portion of the load on the rear joint in bending. The latter also has clearance issues with the chassis right there.
These are just things Ive been noodling on for my next project. I really want adjustable control arms. Welded tubes is the easy path, but I have a CNC...
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MrAWD (Aug 18, 2016)
#221
Evolving Member
Since you're looking at Porsche 911 parts, and you have a CNC, here's a few good examples to ponder;
http://elephantracing.com/suspension...ntrol-arms.htm
Basically, convert the front control arm into a two piece assembly.
http://elephantracing.com/suspension...ntrol-arms.htm
Basically, convert the front control arm into a two piece assembly.
#222
Evolved Member
iTrader: (2)
Since you're looking at Porsche 911 parts, and you have a CNC, here's a few good examples to ponder;
http://elephantracing.com/suspension...ntrol-arms.htm
Basically, convert the front control arm into a two piece assembly.
http://elephantracing.com/suspension...ntrol-arms.htm
Basically, convert the front control arm into a two piece assembly.
#223
EvoM Guru
iTrader: (1)
Originally Posted by griceiv
threads in bending...would not buy.
#224
EvoM Guru
iTrader: (2)
Well I'm finally going to the national championships, just in time before I get too old.
I just have the standard bolt ons. I did finally got around to work on a tire trailer and 'quick release' hitch/receiver I lowered the trailer too
I hope to make it coming from houston, having never driven more than 5hrs.
looking forward to meeting all you autox addicts!
I just have the standard bolt ons. I did finally got around to work on a tire trailer and 'quick release' hitch/receiver I lowered the trailer too
I hope to make it coming from houston, having never driven more than 5hrs.
looking forward to meeting all you autox addicts!
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ViciousLSD (Sep 1, 2016)