ride heights with the advanced suspension

[Advancedynamix]

So I have a question about the tires achilles economist; a lot of us seem to be using them. Last autocross was my first season and I was using achilles economist 165/50/15 stretched on 15x7 wheels. I felt like I was having traction issues because every time I turned (even a little bit) the car would rotate or lose traction. Now I know this could have been because of my inexperience, lift-off oversteer, tire temperature, tire stretch or that the tires were a few months old or a combination of many things, etc.
But I am stuck with my bias that these tires just lacked grip. All you guys seem to use them and love them, and I do too for daily driving but I want different ones for autocross.

Also my setup is bp/hydro g, advanced suspension 150/120. I liked how the car felt but I have been told that 120/105 is better. Why is that?

Not to thread jack I posted this because I thought of this while reading through the posts

Very excited to try Ryan's new product!

I used to have this issue as well with my b6t/g car. I fixed it with negative camber in the rear. Have you adjusted the camber/toe in the rear?
You can also learn to manage that oversteer and eventually you can use it to dance the car, then add negative camber and increase corner entry speeds.

[skeeters_keeper]

IIRC you're running an aspire rear bar without the camber spacers yet, both of those things can contribute to over steer. Stock rear beam (or even removing the sway bar from the aspire beam) and putting the camber plates in should help quite a bit.
The camber plates can be a little tricky to get adjusted right, if you want to come down one weekend before AX season starts we can set them up - much easier with a lift, and I've done it a half dozen times now. Not till after Insanity though, I'm slammed up till then!

[fudge]

Looks like I will look into the camber plates in the rear then! Thanks

[mikemounlio]

IIRC you're running an aspire rear bar without the camber spacers yet, both of those things can contribute to over steer. Stock rear beam (or even removing the sway bar from the aspire beam) and putting the camber plates in should help quite a bit.
The camber plates can be a little tricky to get adjusted right, if you want to come down one weekend before AX season starts we can set them up - much easier with a lift, and I've done it a half dozen times now. Not till after Insanity though, I'm slammed up till then!

The plates now have a bit more adjustment then the 1st ones right.

[skeeters_keeper]

Yes, all of the normal-production plates have more toe-in adjustment, but that only matters if you're running fairly high ride height. I still have the "pre-production" on my car.

[ryanprins13]

Guess I'll jack the front up 1/2 an inch Sunday and retest.

Did you end up having a chance to try that?

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[Dragonhealer]

Did you end up having a chance to try that?

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I did, I can't tell a difference on the street, except the car is less "nervous" at speed when I have the 150lb/in springs in the rear.
James reports the track handling is improved and is more confidence inspiring, though his lap times only improved by a second. Steering effort is up a small amount.
This change caused our test packings to "squirt" out.

[Dragonhealer]

So I have a question about the tires achilles economist; a lot of us seem to be using them. Last autocross was my first season and I was using achilles economist 165/50/15 stretched on 15x7 wheels. I felt like I was having traction issues because every time I turned (even a little bit) the car would rotate or lose traction. Now I know this could have been because of my inexperience, lift-off oversteer, tire temperature, tire stretch or that the tires were a few months old or a combination of many things, etc.
But I am stuck with my bias that these tires just lacked grip. All you guys seem to use them and love them, and I do too for daily driving but I want different ones for autocross.

Also my setup is bp/hydro g, advanced suspension 150/120. I liked how the car felt but I have been told that 120/105 is better. Why is that?

Not to thread jack I posted this because I thought of this while reading through the posts

Very excited to try Ryan's new product!

Sorry I forgot to reply to this, try lowering your rear tire pressures 5psi.

[fudge]

Sorry I forgot to reply to this, try lowering your rear tire pressures 5psi.

I will try this, thanks!

[mikemounlio]

I will try this, thanks!

Get something to mark on your tires sidewall. Drop/raise psi until you only use only the entire tread. You you are rolling over to the side wall you need more air. If you still need more grip after finding the right psi you might need to look into the camber paltes.

[Dragonhealer]

I need to post a clarification to the preload of the rear upper shock rubber mounts.
3-1/2 turns is specified if you are using old shock rubbers which have taken a "set" over the years. 12 to 14 turns will be correct on new rubbers!
The original 3/4" thick (19mm) are too thick to work well with new rubbers.
Subsequent production spacers will be 5/8" thick (16mm) and the 1/8" (3mm) aluminum washer replaced with a .050" (1.25mm) steel washer.

Sorry for any confusion.

[ryanprins13]

These spacers to adjust static droop are now for sale at the festiva store. See this post here: https://r.tapatalk.com/shareLink/top...7&share_type=t

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