To 315.... or not to 315?????? SP edition
#34
Evolved Member
iTrader: (41)
To add some data points here I've mounted up a couple sets of R888R's 295/30-18 for buddies on their Vettes and was surprised to see on a 10.5 they appeared to be a little bit pinched. They were certainly more pinched than my 295 A7s on a 10.5 which I found strange and wasnt just bc they have that "lip" protector. I've considered going to 315s but seems new wheels would be required.
Since Dallas seems to have ordered new wheels I'll just wait for him to do the dirty work and copy him And no flags for me so should be even easier, lol!
Since Dallas seems to have ordered new wheels I'll just wait for him to do the dirty work and copy him And no flags for me so should be even easier, lol!
#35
EvoM Guru
iTrader: (2)
To add some data points here I've mounted up a couple sets of R888R's 295/30-18 for buddies on their Vettes and was surprised to see on a 10.5 they appeared to be a little bit pinched. They were certainly more pinched than my 295 A7s on a 10.5 which I found strange and wasnt just bc they have that "lip" protector. I've considered going to 315s but seems new wheels would be required.
Since Dallas seems to have ordered new wheels I'll just wait for him to do the dirty work and copy him And no flags for me so should be even easier, lol!
Since Dallas seems to have ordered new wheels I'll just wait for him to do the dirty work and copy him And no flags for me so should be even easier, lol!
#37
Evolved Member
iTrader: (15)
Excellent point I somehow completely forgot about. For those running 315's or looking to - is the evox control arm like clearance a must in the steps to get that working? This applies to the 275 tires coming within a couple mm of the frame on full lock typically. Because you would need to push it "out" and that'd be a first step.
#38
EvoM Guru
iTrader: (1)
Excellent point I somehow completely forgot about. For those running 315's or looking to - is the evox control arm like clearance a must in the steps to get that working? This applies to the 275 tires coming within a couple mm of the frame on full lock typically. Because you would need to push it "out" and that'd be a first step.
What the X arms (or just longer arms) will do is reduce the scrub but sacrifice the SAI. Lower arm moving to X is 20mm longer which comes out to be about 1.8deg more SAI angle but decreases scrub by a lot. I don't know which way is better here, but my thought for now is going with the path of least resistance. I may try it both ways with a billet X arm since it will just swap in replacing my 8/9 arms. But would probably just wait till I had a defect part so Im not testing good products
Now you could move the strut top out as well but that going to be about a 1:1 effect on pushing the wheels out also. Maybe not an issue on track but for AX that just makes for a wider car. Of course Im coming at it from the perspective of narrow and low as possible.
#42
EvoM Guru
iTrader: (1)
This thread is probably worth revisting
https://www.evolutionm.net/forums/mo...angle-you.html
With this table I made looking at the effects of SAI, Caster, Static Camber on instant camber for different steering angles.
Add another ~1.8 to 2 deg to "K" here and its where Id be with long control arms and fully inset strut top.
https://www.evolutionm.net/forums/mo...angle-you.html
With this table I made looking at the effects of SAI, Caster, Static Camber on instant camber for different steering angles.
Add another ~1.8 to 2 deg to "K" here and its where Id be with long control arms and fully inset strut top.
#43
EvoM Guru
iTrader: (2)
Per your picture is negative steering angle wheels being steered away from the side measured?
I'll have to read the thread. 20* seems like a ton of SAI. I remember reading somewhere that going far above 10 greatly increases jacking forces and will largely contribute to lifting tires.
I'll have to read the thread. 20* seems like a ton of SAI. I remember reading somewhere that going far above 10 greatly increases jacking forces and will largely contribute to lifting tires.
#44
EvoM Guru
iTrader: (1)
Negative would be the the inside tire but doesn't take into account Ackerman. Thought that seemed important in working to see if we were flattening out the inside so it could do more work. So adding caster, SAI, and scrub all seem to be increasing jacking though I haven't looked to see if scrub or ackerman has a bigger effect on jacking.