Gauging interest in Shorty Subframe connector GB

[SHO--ripper]

I've decided to go ahead and start the Group Buy. Check the group buy section over the next day or so, and place your orders

 

[Racer X]

A must have for any GEN II!

Cosigned!

 

[ghostrider]

I'm down for a set.

 

[SHO--ripper]

Check the group buy section. It has started

 

[1slickRED89]

Well, if you don't bevel the front edge, and you bottom out, I want certain pieces off your car when they total it and you part it out.

I'm not sure how hitting something with un beveled SFC's could total a car. has anyone ever seen or heard a report about this? as far as I can guess, the worst case senario the front end will would be a collection point for grass and weeds if one drove off road. Corey

 

[Racer X]

I'm not sure how hitting something with un beveled SFC's could total a car. has anyone ever seen or heard a report about this? as far as I can guess, the worst case senario the front end will would be a collection point for grass and weeds if one drove off road. Corey

If the edge of the beveled SFC caught a curb, it'd just bounce up and off. If the edge of an unbeveled SFC caught a curb, and for some reason God were to part the heavens and bless you with the luck of the Irish at that moment, the SFC would be ripped off quite violently. More than likely, however, the SFC won't rip off, and your unibody will be teh fuxor'd, big time.

Either way, try to get it on video if you can. :corn:

 

[SHO--ripper]

To get rid of any confusion these SFC's aren't going to take the bottom of your car off if you jump a curb. They are beveled, not square.

 

[Yamaha V6]

For a visual, watch the Mythbusters where they drop the front of the driveshaft off the car, and try to pole-vault it.

 

[1slickRED89]

To get rid of any confusion these SFC's aren't going to take the bottom of your car off if you jump a curb. They are beveled, not square.

I'm sure you sell a fine product i'm just addressing the people who think that a car can be destroyed from hitting a curb with a square part of a SFC, which of course your item doesn't have.

If the edge of the beveled SFC caught a curb, it'd just bounce up and off. If the edge of an unbeveled SFC caught a curb, and for some reason God were to part the heavens and bless you with the luck of the Irish at that moment, the SFC would be ripped off quite violently. More than likely, however, the SFC won't rip off, and your unibody will be teh fuxor'd, big time.

i disagree, i could safly say that if one jumped a curb in such a way that the floor pan came that close to the ground:

a. you would wreck many parts anyway

b. the thick walled steel would simply chip away the brittle concrete and your car would continue on it's way into whatever was hit anyway.

now you could say that going over a speed bump might also cause a problem. but indeed, if full length SFC are held on with 1" welds ever 6 inches that would make for roughly 12" of weld per connector, assuming a 1/4" weld thickness thoughout, thats 3 sqaure inches of weld at a very conserivtive 34KSI yeild strength it would take over 100,000 pound of force to "rip" each connector from the body of the car, point being somthing else will give first. now shortied have roughtly 5 square inches of weld area to each end of the connector (1.75" on either side and 2" on each end) thats still over 40,000lbs of force to break the welds. just proving that nothing you can hit will rip a SFC from the body of a car. that said i think beveling sfc is a good idea, just know what your talking about before you get melodramtic and get people to worry.

For a visual, watch the Mythbusters where they drop the front of the driveshaft off the car, and try to pole-vault it.

that myth was busted. Corey

 

[Yamaha V6]

The Pole Vaulting part was, did you see the damage the car lift (ie, LOTS of force exerted upon the car), and the damage that was done to the chassis (not just the hole in the trunk pan)? That was what I referring to, for a visual of how nasty a hit that is. That was my point, anyway.

 

[Racer X]

that said i think beveling sfc is a good idea, just know what your talking about before you get melodramtic and get people to worry.

Ok, now go back and read my post carefully. You'll see that I said that in a good case scenario, the SFC would be ripped from the car. You'll also see that I said that more than likely, the SFC won't rip off, and consequently will cause moderate to significant damage to the chassis, depending on how hard the hit is on a square faced SFC.

Thank you, however, for reiterating my point with the mechanical engineering aspects included.

 

[1slickRED89]

Thank you, however, for reiterating my point with the mechanical engineering aspects included.

np. I though I should go one step further with this post though. since this perticuler malidy has never happened in real life, that i know of, i'll have to work simply with numbers.

To twist the body of a car I think that maybe only ONE connector face would smack concrete, and for the sake of numbers lets say only one hits. concrete has a compresive strength (point at which it crumbles or otherwise breaks) between 3 and 6 KSI, probably less if the concrete in question is in an area where cars frequently crash into it, but lets go with 6,000 psi all the same. a 2" x 1" SFC with a un beveled face has an area of 2" sqaure. so to crumble away concrete you would need 12,000lbs static force, less for a shock load as we are talking about, but I don't know how to calculate that. to make my post easier to understand I'll use acceration in G's, this eliminates what speed one my be going from consideration. *crunchs numbers*. that comes to about 4G's for a 3000 lb car. MAIN POINT, if you hit a concrete birm with the front end of a car with one SFC face you and your car will feel roughly a 4G deacceration!! to give you a feel how little that is air bag deployment for cars made after 1998 is around 80G's, previously years are around 36G's, 4G is about a smack on the back your not going to twist anything on your frame from a SFC having a flat face. tie rod ends and other crash items, probably, but no twisted frames. then again I live in Ohio where birms are rare so the treat is less real to me. Corey

 

[Slo-Sho]

Check out the big brain on Corey!