2024 SCCA SOLO - STU Discussion
#46
Evolving Member
So something, I'm unclear on for the Evo X, as this year I'm working/planning suspension (currently stock). What I'm unsure about is bushing materials. With the rules stating no increase in metal, I honestly have no idea what our bushing rubber/metal ratios are. I'm researching rear camber arms to add after installing coilovers. Are there any threads regarding materials out there? The SPLs caught my eye at first, look lighter than WL but just guessing..
#47
So the bushing allowances have changed (a year or so ago):
14.8 B. Suspension bushings may be replaced with bushings of any materials as long as they fit in the original location. Offset bushings may be used. This does not authorize a change in type of bushing (e.g., ball and socket replacing a cylindrical bushing) or use of a bushing with an angled hole whose direction differs from that of the original bushing. If the standard bushing accommodated multi-axis motion via compliance of the component material(s), the replacement bushing may not be changed to accommodate such motion via a change in bushing type, for example to a spherical bearing or similar component involving internal moving parts. Pins or keys may be used to prevent the rotation of alternate bushings but may serve no other purpose than that of retaining the bushing in the desired position.
So from what I gather, you can change your bushings to any material type, but the bushing type itself needs to stay the same. Someone, please correct me if I'm wrong here!
14.8 B. Suspension bushings may be replaced with bushings of any materials as long as they fit in the original location. Offset bushings may be used. This does not authorize a change in type of bushing (e.g., ball and socket replacing a cylindrical bushing) or use of a bushing with an angled hole whose direction differs from that of the original bushing. If the standard bushing accommodated multi-axis motion via compliance of the component material(s), the replacement bushing may not be changed to accommodate such motion via a change in bushing type, for example to a spherical bearing or similar component involving internal moving parts. Pins or keys may be used to prevent the rotation of alternate bushings but may serve no other purpose than that of retaining the bushing in the desired position.
So from what I gather, you can change your bushings to any material type, but the bushing type itself needs to stay the same. Someone, please correct me if I'm wrong here!
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RobbieOh (Jan 4, 2024)
#48
Evolving Member
Interesting. Okay, I do remember reading that last year, I think my eyes glossed over tho. So as long as the movement of the bushing remains the same, it should be good to go.
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Construct (Jan 11, 2024)
#54
EvoM Guru
iTrader: (10)
Planning out my calendar for 2024. I'd like to do at least one tour in the Midwestish area since it seems like those were reasonably well populated in STU last year.
Spring nats would probably be the best one competition wise but I don't think I have an 18 hr drive in me for not-Nats.
Peru had 9 drivers as well as last year's national champion
- 10 hr drive
https://cdn.connectsites.net/user_fi...pdf?1687113406
Bristol had 9 drivers as well - 6 hr drive
https://cdn.connectsites.net/user_fi...pdf?1692117944
Chicago - 12 drivers - Brent won by 1.8 seconds - 11 hr drive
https://cdn.connectsites.net/user_fi...pdf?1689532832
Finger lakes - closeish, but had only 5 cars and lost to STR by 10 seconds (weather maybe?) - 6 hr drive
https://cdn.connectsites.net/user_fi...pdf?1690747182
I'm thinking Peru or Chicago for depth of competition - how are the lots? how are the events, vibes etc?
Spring nats would probably be the best one competition wise but I don't think I have an 18 hr drive in me for not-Nats.
Peru had 9 drivers as well as last year's national champion
![Smilie](https://www.evolutionm.net/forums/images/smilies/smile.gif)
https://cdn.connectsites.net/user_fi...pdf?1687113406
Bristol had 9 drivers as well - 6 hr drive
https://cdn.connectsites.net/user_fi...pdf?1692117944
Chicago - 12 drivers - Brent won by 1.8 seconds - 11 hr drive
https://cdn.connectsites.net/user_fi...pdf?1689532832
Finger lakes - closeish, but had only 5 cars and lost to STR by 10 seconds (weather maybe?) - 6 hr drive
https://cdn.connectsites.net/user_fi...pdf?1690747182
I'm thinking Peru or Chicago for depth of competition - how are the lots? how are the events, vibes etc?
#55
Planning out my calendar for 2024. I'd like to do at least one tour in the Midwestish area since it seems like those were reasonably well populated in STU last year.
Spring nats would probably be the best one competition wise but I don't think I have an 18 hr drive in me for not-Nats.
Peru had 9 drivers as well as last year's national champion
- 10 hr drive
https://cdn.connectsites.net/user_fi...pdf?1687113406
Bristol had 9 drivers as well - 6 hr drive
https://cdn.connectsites.net/user_fi...pdf?1692117944
Chicago - 12 drivers - Brent won by 1.8 seconds - 11 hr drive
https://cdn.connectsites.net/user_fi...pdf?1689532832
Finger lakes - closeish, but had only 5 cars and lost to STR by 10 seconds (weather maybe?) - 6 hr drive
https://cdn.connectsites.net/user_fi...pdf?1690747182
I'm thinking Peru or Chicago for depth of competition - how are the lots? how are the events, vibes etc?
Spring nats would probably be the best one competition wise but I don't think I have an 18 hr drive in me for not-Nats.
Peru had 9 drivers as well as last year's national champion
![Smilie](https://www.evolutionm.net/forums/images/smilies/smile.gif)
https://cdn.connectsites.net/user_fi...pdf?1687113406
Bristol had 9 drivers as well - 6 hr drive
https://cdn.connectsites.net/user_fi...pdf?1692117944
Chicago - 12 drivers - Brent won by 1.8 seconds - 11 hr drive
https://cdn.connectsites.net/user_fi...pdf?1689532832
Finger lakes - closeish, but had only 5 cars and lost to STR by 10 seconds (weather maybe?) - 6 hr drive
https://cdn.connectsites.net/user_fi...pdf?1690747182
I'm thinking Peru or Chicago for depth of competition - how are the lots? how are the events, vibes etc?
I'm going to skip Peru this year. I went in '23. They are very limited in what they can do with their lot designs, but it is on concrete! There's a bit of a drive from hotels to get to the site as it's a Airforce base with small towns about 30 minutes away in every direction. There's videos on my youtube there as well.
chicago Day 1
chicago Day 2
#57
Evolved Member
iTrader: (3)
So noticed my fronts were like this. I'm running -4.5 up front with driving to autocross events and some driving around town, not a lot. I know my inside tire temps are higher when finishing an Autocross run but chalked that up to braking at the finish causing the higher inner tire temps. Makes me wonder if I'm actually running too much camber at the fronts. I've done -4 on 2 or 3 sets and never had wear like this. Thoughts?
#58
EvoM Guru
iTrader: (10)
So noticed my fronts were like this. I'm running -4.5 up front with driving to autocross events and some driving around town, not a lot. I know my inside tire temps are higher when finishing an Autocross run but chalked that up to braking at the finish causing the higher inner tire temps. Makes me wonder if I'm actually running too much camber at the fronts. I've done -4 on 2 or 3 sets and never had wear like this. Thoughts?
#59
EvoM Guru
iTrader: (1)
Originally Posted by CaptainSquirts
So noticed my fronts were like this. I'm running -4.5 up front with driving to autocross events and some driving around town, not a lot. I know my inside tire temps are higher when finishing an Autocross run but chalked that up to braking at the finish causing the higher inner tire temps. Makes me wonder if I'm actually running too much camber at the fronts. I've done -4 on 2 or 3 sets and never had wear like this. Thoughts?
Camber is 100% about tire wear and temps.
When we setup a spring race car, best grip usually means the inner edge cords in about an hour of track time. Endurance cars we setup for more even wear, but ultimate grip is given up.
So, did the front of the car work better for you? And if so was it worth the shorter tire life?
#60
EvoM Guru
iTrader: (2)
So noticed my fronts were like this. I'm running -4.5 up front with driving to autocross events and some driving around town, not a lot. I know my inside tire temps are higher when finishing an Autocross run but chalked that up to braking at the finish causing the higher inner tire temps. Makes me wonder if I'm actually running too much camber at the fronts. I've done -4 on 2 or 3 sets and never had wear like this. Thoughts?