Duke
Duke MegaDork
5/28/24 1:11 p.m.

OK, hive:

We generally follow That Big Old Club's autocross classing.  We have someone who wants to enter a 2023 BMW IX, for whatever reason.

Track width is 66.0 F / 67.2 R, for an average of 66.6 inches.  Overall height is 66.8 inches.  I'm OK with that, subject to visual review of the vehicle on course.

But... what class?  I have no idea.  We haven't adopted EVX yet, and I'd rather not start with a single vehicle.

Any suggestions?  Thanks!

Sonic
Sonic UberDork
5/28/24 1:37 p.m.

Whatever class other super SUVs end up in seems to make sense, like an X5M or Cayenne Turbo.  

dps214
dps214 SuperDork
5/28/24 3:11 p.m.

Unmodified? SS ("all eligible unclassified cars not covered by another catch-all listing")

camopaint0707
camopaint0707 HalfDork
5/28/24 3:41 p.m.

In reply to dps214 :

This, because in reality it won't be competitive so what does it even matter.

ojannen
ojannen HalfDork
5/28/24 3:57 p.m.

Out of curiosity, is there a standard for electric cars that are on the edge of the height/width rollover threshold?  They all have a lower center of gravity due to the battery pack but I haven't had much luck finding official documentation.

I think the most obvious example is the BMW i3.  It is on the wrong side of the ratio.  Press material from the launch suggest it has a lower CoG than an equivalent 3 series but there isn't anything official from BMW.  It is in H-Street so someone decided it was ok but I am not sure what the process looks like.

81cpcamaro
81cpcamaro SuperDork
5/29/24 10:27 a.m.

Since most new vehicles have a Safety Stability Factor, that can be used to determine if the vehicle is safe for autox. The SSF needs to be 1.30 or higher to be allowed.  Otherwise it is the height of the vehicle needs to be the same or less than the track width.

Duke
Duke MegaDork
5/29/24 10:40 a.m.

In reply to 81cpcamaro :

Apparently the IX is "Not Rated" for Static Stability Factor according to the NHTSA website.  But with the dimensions given and the battery in its belly, I'm going to let them run, with the caveat that we may pull the plug if the vehicle looks unhappy on course.

I will put them in SS under the catch-all as dps214 recommended.  Thanks, all!

 

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