Following is a list of restrictions that the SCCA has created for the street prepared autocross class with reguard to SFC's. I'm looking for some recommendations that will fit within these rules. My initial thought is that I will likely need to make my own. I have never paid much attention to SFC's since up until now no SFC's were allowed in this class so I'm not too sure what's out there.

E Longitudinal (fore-aft) subframe connectors (“SFCs”) are permitted with the following restrictions:
1. They must only connect previously unconnected boxed frame rails on unibody vehicles.
2. Each SFC must attach at no more than three points on the unibody (e.g. front, rear, and one point in between
such as a seat mount brace or rocker box brace).
3. SFCs must be bolted or welded, but welding must be to the OE subframe stampings, not to the floorpan in
between.
4. No cutting of OE subframes or floorpan stampings is permitted. Drilling is permitted for mounting bolts only.
5. No cross-car/lateral/triangulated connections directly between the driver’s side and passenger’s side SFCs are
permitted. Connections to OE components such as tunnel braces or closure panels via bolts are allowed and count
as the third point of attachment. No alteration to the OE components is permitted.
6. SFCs may not be used to attach other components (including but not limited to torque arm front mounts or driveshaft
loops) and may serve no other purpose.”

 

from what i see, just about every subframe connector on the market will work, only issue could be spohns because they are usually welded to the pinch rail and that is not allowed

 

To me it looks like only something like the Alstons would be legal.

 

Wow thats strict. I guess my Spohn's cant make it. heh

 

It is restrictive but it is better than no SFC's which was the case previously. I looked at the spohn's and if you skip the pinch seam welds I'm still not sure if the front tie in point is ok. The description is simply "behind the front wheel well" and I could not tell from the photos. Also not sure how effective they would be without the pinch seam welds. I will check Alstons next. I'm thinking the old Southside Machining design would fit.

 

Suck they don't allow a cross brace ie (Torque arm,drive shaft loop) My SSM are fine if I didn't seam weld them to the whole floor pan. And I will be running the BMR Ex-treme Torque Arm.

Are Roll-Cages allowed?

 

UMI SFC's only have 3 connection points to the car. One at the front subframe, one at the transmission tunnel and one at the lower control arm. By the description in item #5, this seems legal even though all three spots are welded. But items #2 & #3 make the fact that they are welded seem OK

Also seems that a bolt used on the tunnel brace would make these OK...

 

It looks like the UMI fits the need. It looks like it is a bit on the heavy side though. So far that is the best option I've seen. The way I read it the third point only needs to be bolted if it attaches to bolted component. The UMI attaches the third point to the sub frame so it should be good. Any other options

 

I just put the UMI's on my car. The connectors themselves are great, and strong. Just make sure you have a really good welder put them on. I tried to save money by having a friend put them on, and now I screwed myself over because I have these heavy red things permanently attached to my car, but they dont do a thing for it except make the t-tops squeak more, and some funny other noises.

[link]https://www.thirdgen.org/forums/aftermarket-product-review/456257-umi-subframe-connectors.html[/link]

 

I'm glad to hear this since I will be swapping out a lot of my suspension for the 08 autocross season.

Wouldn't the Spohn sfc work as long as you don't pinch weld to the floor? I've heard/seen that they tuck under the car better than anything else which is good for me because I like the stock look.

 

Hmm... this is good news. It looks like I'll have the guy installing my Spohn SFCs to not do the seam welding. Seems like they would be legal from what I can tell. Probably pointless though, cause my car is probably an ESP car without the SFCs. I just need to get another car to auto-x with and just finish this one as fun street machine.

 

Yes I do think the spohns work with out stitch welding to the pinch frame. What material are the UMI's made of?

 

This is off there site....