Autocross- SCCA EV-X Class vs. SS

[Dallas J]

Looks like Unplugged also sells theirs individually and has 2 options.

 

[Yperformance]

Excuse my ignorance, I just did a Autocross test day and loved it.
My car already has square all round 285, coilovers, adjustable front control arms , rear camber and toe arms. Just about to install track module. What class will I be running in, can't quit work it out.

 

[Rodney!]

Looks like Unplugged also sells theirs individually and has 2 options.

If anyone is interested, I have the unplugged Race bars, front was used for two events and rear is brand new.

 

[Dallas J]

Excuse my ignorance, I just did a Autocross test day and loved it.
My car already has square all round 285, coilovers, adjustable front control arms , rear camber and toe arms. Just about to install track module. What class will I be running in, can't quit work it out.

So this is the problem with EVX, that camber and toe arm put you in SM basically. Though really you can just run EVX and no one would care.

If anyone is interested, I have the unplugged Race bars, front was used for two events and rear is brand new.

I'll take em. That'll be a decent compromise for what we're doing.

 

[Rodney!]

I'll take em. That'll be a decent compromise for what we're doing.

Ah, the old guard in SM (ran SM from 2000 to 2008) working with the new SM guy...

Pm sent.

 

[Dallas J]

Ah, the old guard in SM (ran SM from 2000 to 2008) working with the new SM guy...

Pm sent.

Oh snap, I thought I was old school SM. I started in 2004 in SM with my Talon and just never left.

 

[dsgerbc]

So this is the problem with EVX, that camber and toe arm put you in SM basically. Though really you can just run EVX and no one would care.



I'll take em. That'll be a decent compromise for what we're doing.

Technically, the rule about not modifying both upper/lower arms is under camber kits and says nothing about toe arms. But maybe someone should write to SEB and make those explicitly allowed.

 

[Rodney!]

Oh snap, I thought I was old school SM. I started in 2004 in SM with my Talon and just never left.

Dennis Grant days? That guy was such a tool...

 

[NoDrama]

Just thought I'd follow up for anyone who is interested. Wheels and tires all mounted and good now.

To recap, 19"x9.5"+35 Konig Ampliforms, with 275/35/19 BFG Rival S 1.5. Pictures of tire hitting knuckle:

View attachment 855106View attachment 855107
Now mounted with 5mm wheel spacers:

View attachment 855113

End result. MPP FUCA with -3 deg camber in front, and MPP Rear Camber Arms with -2 deg camber rear. First track day this weekend, then hopefully first autocross a week later!!:

View attachment 855115View attachment 855117View attachment 855119View attachment 855121View attachment 855123

So, the plot thickens. Did my track day last weekend - very fun, all good. Then yesterday (4 days later) I lost traction control, ABS, cruise control, regen... So this happened:

Installed new speed sensor, with belt and suspenders and suspenders:

Added a 3mm spacer to the 5mm, to yield 8mm of spacer:

Hope I'm good now! Autocross on Saturday...

 

[Yperformance]

Using MPP arms how much caster do you get.

 

[dsgerbc]

Added a 3mm spacer to the 5mm, to yield 8mm of spacer:

Oh-oh, now you need extended studs.

 

[gearchruncher]

Using MPP arms how much caster do you get.

MPP arms do not change stock caster nor allow you to adjust it.

 

[NoDrama]

Oh-oh, now you need extended studs.

How

Oh-oh, now you need extended studs.

Crap. You're probably right.

So it looks like the +25 offset Ampliforms would be a perfect fit for me, vs. the +35 that I'm working to make fit now. Seems odd based on past experience that everyone has posted on this forum. Can anyone explain this?

 

[jackmott]

How

Crap. You're probably right.

So it looks like the +25 offset Ampliforms would be a perfect fit for me, vs. the +35 that I'm working to make fit now. Seems odd based on past experience that everyone has posted on this forum. Can anyone explain this?

Variance in how close that wire is?
variance in tire width and deflection?

 

[gearchruncher]

Seems odd based on past experience that everyone has posted on this forum. Can anyone explain this?

Like I mentioned before, the rivals are wider than other 275 tires.
I've seen the upright rubbing like you have too though, like I also mentioned before. It's trivial to keep the ABS wire out of the way of this though. If you can live with a bit of tire rub at high loads, you can probably run just your 3mm spacer to make up for the wider tire.

 

[Yperformance]

I run 285/35/20 square. My offset is 35 . No problems. I think some tires are wider Hoosier are an inch wider than my Michelin A/S 285s for example.

 

[Rodney!]

So it looks like the +25 offset Ampliforms would be a perfect fit for me, vs. the +35 that I'm working to make fit now. Seems odd based on past experience that everyone has posted on this forum. Can anyone explain this?

BFG's are typically a smidge wider than other manufacturers, so I'm going to go with that reasoning.

 

[dsgerbc]

How

Crap. You're probably right.

So it looks like the +25 offset Ampliforms would be a perfect fit for me, vs. the +35 that I'm working to make fit now. Seems odd based on past experience that everyone has posted on this forum. Can anyone explain this?

TBH, I don't think you need that much clearance between the knuckle and the tire. Go back to 5mm spacer and move the zip-tie either above the rub point, or below.

 

[gearchruncher]

I run 285/35/20 square. My offset is 35 . No problems. I think some tires are wider Hoosier are an inch wider than my Michelin A/S 285s for example.

I assume from your user name that you have a Model Y, not a Model 3? The knuckles on a 3/Y have a different part number, now I wonder what the difference is....

 

[jackmott]

I assume from your user name that you have a Model Y, not a Model 3? The knuckles on a 3/Y have a different part number, now I wonder what the difference is....

Wondering if Y knuckles can be used to fit more tire on a 3? heh