Originally Posted by
Cain
How is the hit on the wheel for the inside tire on the turn (basically the opposite direction in your picture)?
The pic was taken in that angle to show the turnbuckle itself.
Here's the comparison.
Stock. Turnbuckle touches the spring.
Modded. Turnbuckle is not able to touch the spring.
Originally Posted by
Cain
By the way nice mod using a button head screw with the nut on the back of the tower! That should help with tracks that require you to trim flush the screw to the nut on the front to protect the carpet, I gotta give that a look see.
Yup. Saves carpet from tearing, saves screw from bending and makes shock tower hole changes easier. Give it a try!
Originally Posted by
Cain
So something that appears to be an option for tuning for more rotation has been going back to the S3 a-arms from the CAL3 with shorter driveshafts (68mm) though I wonder if you could still run the 69mm and pull the shims that are on them which I think are about 1mm in shims?
69mm driveshafts do come with 2x0.5mm shims for a total of 1mm.
Not true for S3 arms.
What are the handling differences between the 73 and 75mm arms.
Brief explanation from RogerM (thanks!)
The arm length effects the roll centre and more significantly the roll centre migration as the car rolls in the corners.
Shorter rear arms will encourage more tire loading so more grip as the car rolls, great for lower grip surfaces but on high grip surfaces they can stall the rotation mid corner costing corner speed. They can also make the car feel more reactive which is good when a low grip level makes the car feel less reactive so making it harder to place in technical sections.
Long rear arms the opposite, car will rotate more freely for more corner speed but won't generate as much side-bite so mid/late corner will be reduced. Make the car feel naturally lazier which is great on high grip surfaces as it makes the car easier to drive overall.
So the long Vs short rear arm is just like the flat Vs gullwing front arm, all about the grip level from the surface and how technical the track layout is.
Originally Posted by
Cain
I have also seen some recent setups using the YZ4SF2 rear hubs but with stock L5 a-arms on the CAL3.1. I am assuming this also narrows the car on the rear but of course keeps the same shock positions relative to the a-arm versus going to S3 a-arms but stock rear carriers.
Has anyone tried the two and has information on how they felt in comparison to each other, as well as in comparison to the stock car rear hub / arm setup?
SF2 rear hubs do narrow rear width a lot. probably needs some different driveshafts or axles. Is your car lacking something?