Outside of tire turning blue
#31
Evolving Member
Thread Starter
BTW, I dropped 3.7 sec from my last time at this track with the following changes:
RE71R 275 from 255 (i measured only about a .5" increase in diameter)
Spring rate increase in the front
Tire pressure increase on all 4 corners
RE71R 275 from 255 (i measured only about a .5" increase in diameter)
Spring rate increase in the front
Tire pressure increase on all 4 corners
#33
EvoM Guru
iTrader: (4)
Please don't take this the wrong way as I don't know you. How much experience with autocrossing on Rivals/Stones do you have? Ask some of the top guys winning nationals in any class about these tires. Better yet try it yourself. Many go as low as mid 20s, most around high 20s on proper camber cars. Limited camber cars go anywhere from low to mid 30s.
#35
EvoM Guru
iTrader: (1)
Glad to hear you're happy with the new setup and that we were able to help you get there.
#36
Evolved Member
I don't have suspension numbers as you because I have to keep it stock, but my car went faster when I dropped the pressure from 38-39 down to 34 in the front. At the same time rears went from 36 down to 28. I do get blue markings at the edges and edges get beat big time, but the car is faster! And, with such low pressure I run in the rear, they get much higher temperature buildup compare to higher pressures.
Disclaimer: this is autoX only of course!
Disclaimer: this is autoX only of course!
#37
Evolving Member
Thread Starter
I don't have suspension numbers as you because I have to keep it stock, but my car went faster when I dropped the pressure from 38-39 down to 34 in the front. At the same time rears went from 36 down to 28. I do get blue markings at the edges and edges get beat big time, but the car is faster! And, with such low pressure I run in the rear, they get much higher temperature buildup compare to higher pressures.
Disclaimer: this is autoX only of course!
Disclaimer: this is autoX only of course!
That blueing is really bad. You are cooking the compounds that make the tire what it is. There is a sweet spot for tire and chassis combination. From experience untill you dont turn the sidewall blue, you havent headed the right direction. Since you AX its prob more to do with tire temps. you are making up the traction from the heat a tire should have by the pressure being low at the cost of the tires life cycle.
Last edited by xBoostx; May 15, 2017 at 12:47 PM.
#38
Evolving Member
Thread Starter
#39
EvoM Guru
iTrader: (1)
Get a new OEM gasket, and all new OEM hardware, also get x8 of the OEM concave washers. Use 2 washers on each bolt/stud. Make sure the washers face each other like so: (). Torque to 41ftlbs. I've had good luck with this.
#42
Evolving Member
Thread Starter
#43
EvoM Guru
iTrader: (1)
Unfortunately with the MAP cast manifold for the Evo X theres only space to do that on 2 studs. 1 of my studs is a head stud with nuts top and bottom. They still loosen up. My last occasion i had the nut stay on the stud and the stud back ALL the way out LOL.
I was looking at those. Thats what im buying for the next solution. Glad to know its the way to go!
I was looking at those. Thats what im buying for the next solution. Glad to know its the way to go!
The stud coming out with the nut still on it just means it came loose. The studs aren't an interference fit into the turbine housing. When the threads are clean, you can run them in and out by hand.
#45
Evolving Member
Thread Starter
Misread, i was thinking double nuts. I have it that way on one stud. Still came loose. On the oem manifold they all come double washer