CSG and RCE tag-team suspension Q&A thread! Ask us anything!

[cdrazic93]

I guess it just comes down to how crazy you want to get with the car.

[cdrazic93]

@CSG Mike
Is there anything that's more complicated than motion ratio in terms of suspenion? Or is that as bad as it gets?

[Captain Snooze]

Originally Posted by cdrazic93

@CSG Mike
Is there anything that's more complicated than motion ratio in terms of suspenion? Or is that as bad as it gets?

Originally Posted by Racecomp Engineering

There's the motion ratio but also things like camber curve, roll centers, bump travel, etc that are different and change differently front and rear. So there's a whole bunch of stuff to look at.

.

[cdrazic93]

Originally Posted by Captain Snooze

.

See all that seems more docile than motion ratio...although roll center is a doozy...

[Captain Snooze]

Originally Posted by cdrazic93

although roll center is a doozy...

Watch out for roll centers. Is it not the center which the car rotates about but the point at which the car rotates about at that particular point in time depending on what the car is doing. That is, the roll center can move about, off center line as well. Should be called instantaneous roll point.

Originally Posted by Racecomp Engineering

A lot of people are moving away from kinematic roll centers anyway and using force based roll centers and force application points (FAPs). The KRC is a good effective first look for most of us though especially in a simplified static condition.

[Racecomp Engineering]

Originally Posted by cdrazic93

See all that seems more docile than motion ratio...although roll center is a doozy...

Oh man, it gets way more complicated than motion ratios! Shocks on their own is a never ending rabbit hole of complicated lack of sleep. Always more to learn. Roll centers/FAPS and geometry are also very difficult concepts to grasp. Lots of things I'm still working on getting my head around.

- Andy

[Dimman]

Virtual centers (roll center is one type) for geometry are a PITA. Take point A and point B, draw an imaginary line until it intersects another imaginary line off of another set of points, in 3 dimensions, and can possibly end up underground or in the middle of the car. And the initial points change as the suspension moves, so a degree of recalculation needs to be done for different suspension positions. And those virtual centers then affect how other points with virtual centers move.

Fun times.

[cdrazic93]

Originally Posted by Racecomp Engineering

Shocks on their own is a never ending rabbit hole of complicated lack of sleep

This would be a good sig lol

Good to know I need more math to accurately understand what is happening...yaaaay calculus

[solidONE]

Originally Posted by cdrazic93

This would be a good sig lol

Good to know I need more math to accurately understand what is happening...yaaaay calculus

How do I dislike this or "No Thanks" this post?

CALLUCUS!!!!!!!

[200hp/tonne]

Will the Bilstein B14 PSS work well with 215/45-17 Michelin Pilot Super Sports on 14 lb Kosei K4r 17X7 wheels?
What would be a good Sway bar setup for the above parts?

Goals for car are:
-DD with 4-5 track days a year max
-Good ride quality for crap Detroit roads
-Equal steering response to stock or better
-Neutral to slight oversteer handling

I am also open to other coilover options under or around 1500$.
Thanks

[cdrazic93]

Originally Posted by solidONE

How do I dislike this or "No Thanks" this post?

CALLUCUS!!!!!!!

I know I feel the pain too Dx

[cdrazic93]

Originally Posted by 200hp/tonne

Will the Bilstein B14 PSS work well with 215/45-17 Michelin Pilot Super Sports on 14 lb Kosei K4r 17X7 wheels?
What would be a good Sway bar setup for the above parts?

Goals for car are:
-DD with 4-5 track days a year max
-Good ride quality for crap Detroit roads
-Equal steering response to stock or better
-Neutral to slight oversteer handling

Around $1,500 you say? RCE Tarmac 0's would be better applicable to the situation IMO, since they are a bit more aggressive than the B14's are, and probably better feel around the track those 4-5 days out of the year.

[psyclone07]

I am getting a lot of mixed responses when it comes to a question I have and was wondering if you guys could help out.

I have some RCE tarmac 2 going on once the weather gets nice and will be doing some occasional autocross and possibly track days. The car is more of a weekend driver.

I am looking for a decent lightweight rim for autocross and track days/occasional weekend driving. The RpF1's are great rims but I am leaning toward the TsW nurburgrings (simply aesthetics in this case) in a 18x8 w/ 35mm offset(18.6lbs).Would the 10mm difference in offset be detrimental in comparison to the 45mm. Also the 1 inch increase from 17 as well.

I am also looking for tire suggestions as well if you have any. Probably looking to get some Michelin pilot super sports in 225/40/18. (Another mixed area as some people say drop in the widest tire possible and others disagree.)

I appreciate your time and insight. Thanks in advance.

[Racecomp Engineering]

Originally Posted by 200hp/tonne

Will the Bilstein B14 PSS work well with 215/45-17 Michelin Pilot Super Sports on 14 lb Kosei K4r 17X7 wheels?
What would be a good Sway bar setup for the above parts?

Goals for car are:
-DD with 4-5 track days a year max
-Good ride quality for crap Detroit roads
-Equal steering response to stock or better
-Neutral to slight oversteer handling

I am also open to other coilover options under or around 1500$.
Thanks

Not a bad choice. For track work (and in general) I prefer linear spring rates and I wish the Bilsteins were slightly firmer up front but they have good valving. I'd add a front bar at least.

RCE T0 would be worth considering.

- Andy