Sup w/them 2024 Summer Projects?
Mar 3, 2022, 02:30 PM
#4531
if its more than 225 lbs helper spring then you effectively have 'progressive springs'... probably used for serious aero and not for you or me
it's definitely not just from the additional space given by a helper i dont think, since i already asked the question about a longer spring. the only way a minimal helper would provide more droop is if it extended the strut by the height of the helper, but that's going to just raise the car if the helper basically doesn't do anything.
you change the *starting point* by changing spring perch or spring length, then it changes the droop
Mar 3, 2022, 02:40 PM
#4533
NO. stiffer helper may mean quieter driving on a bumper concrete highway.
if its more than 225 lbs helper spring then you effectively have 'progressive springs'... probably used for serious aero and not for you or me
YES
NO. droop is *starting point* of the shock (while standing) to full travel (car lifted)
you change the *starting point* by changing spring perch or spring length, then it changes the droop
if its more than 225 lbs helper spring then you effectively have 'progressive springs'... probably used for serious aero and not for you or me
YES
NO. droop is *starting point* of the shock (while standing) to full travel (car lifted)
you change the *starting point* by changing spring perch or spring length, then it changes the droop
how did you achieve that level of rear camber?
Mar 4, 2022, 09:40 AM
#4540
FWIW none of the regular-ish track evos I've worked with have had a need for more than -2.5° in the rear.
Mar 4, 2022, 09:55 AM
#4541
They are running moderate rates. Nothing crazy but not soft either. One other component, a stock upright evo has a higher camber gain in the rear but also a higher rate of change of camber gain (camber acceleration?). With the SSB rear uprights its reset closer to OEM and more linear gain which is the component that makes the rear more predictable. But because of that it tends to need more camber than a stock upright car.
For example, Stock evo rear lowered 1.5" will be in the 1.0-1.1 (off the top of my head) deg/inch and with my uprights goes back to 0.6-0.7 deg/in and a stock ride height evo is 0.5 deg/in.
EDIT: Just to add, this all comes back to making the rear do more work. I put as much load into the outside rear tire as I can which means its getting more roll also. Just make sure rear tires are warm before you go too ham on track
For example, Stock evo rear lowered 1.5" will be in the 1.0-1.1 (off the top of my head) deg/inch and with my uprights goes back to 0.6-0.7 deg/in and a stock ride height evo is 0.5 deg/in.
EDIT: Just to add, this all comes back to making the rear do more work. I put as much load into the outside rear tire as I can which means its getting more roll also. Just make sure rear tires are warm before you go too ham on track
Mar 4, 2022, 12:24 PM
#4543
Why does it matter if it low? Once the wheel droops past the springs full extension nothing is pushing the tire down but it doesnt matter cause the bar is keeping the tire up. You can have more travel if you want, but its not going to effects much of anything. Using an assist/tender spring "can" soften the landing when tire sets down but it has a negative effect of reducing total roll rate at that intermediate zone which is not good.
It could help very marginally for daily driving. If you're going over uneven surfaces like a driveway entrance and you find yourself lifting a tire, some extra droop travel could reduce the thunk when that tire hits the ground again. But that's about it.
Unless you're jumping the car, in which case you're going to need a lot more droop travel.
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Dallas J (Mar 4, 2022)
