If you have sfc's and wanted to tie a 6/8 point cage into the frame of the car would you tie it into the subframe rails, into the sfc's or both?

Just trying to decide what brand of sfc i want to get and if it really matters.

 

yes it does matterwhat kind of sfc's you have since some of the more expensive ones fit a whole lot better then some of the more generic ones that you can find. I personally installed both the SFC's and a 8 point rollcage and this made the car super rigid which helped greatly in cornering and stabillity in acceleration. both items were time consuming (the rollecage espcially) I have about 800 or so into the sfc's and cage

 

Ya no my question was with some sfc's could you tie the cage into the sfc? or in every scenario would you be tieing the cage into the existing sub frame

 

I.M.O, the subframes are overkill if you are doing the roll cage. I have an 8 point cage in my car and the rigidity it added was awesome.

Are you going to race the car? If not, then save your money and just do subframes since the cage is quite a task.

 

so basically you put a cage into a car that can still flex because you have not tied up the front and rear halves together with subframes. you must always do subframes first or else you're trying to tie up a wet noodle and it'll still bend all around.

 

first of all i do plan on racing the car, not seriously but in auto-x and if i can manage id love to take it on a road course.

second i want a cage because i want to gut the interior of my car and thats the only good excuse for me to do it

Third of all these chassis flex so damn much that the paint cracks by the top corner of the windows they can use all of the chassis stiffening they can get

 

are you from markham IL if so i can show you my car if you need measurements, etc. also my buddy and I do cages all the time for people.

 

damn it grrr now im sad Markham ontario canada. LoL wish i could come check your stuff out

 

I done my sfc and rollcage at the same time, cut and fitted the roll cage, and marked my mounting points, then custom made some sfc's from 2" square stock that i picked up at a local welding shop, remember, measure, measure, measure!!!!

 

oooooh!




so you're saying a flat tube on the floorboard is going to make a huge diff in a car thats braced by a triangulated 3 dimensional braced shape made out of the same tube....


no.


wait.


i dont see the logic there.

lol.


if you know you're going to do a cage (or a roll bar) then dont bother with SFCs, they're just added weight.


remember, the point is to reduce (or eliminate) flex... not to tie the "front subframe" (thats attached to the car in our case) to the "rear subframe" (its a joke to even call it that.... hell the better "subframe connectors" out there really connect to the rear LCA mount.



by the way, before someone replys to this, have you driven a car with a cage in it? with subframes? with both?
if you haven't at least driven with just a cage and just SFCs, i dont see how you're qualified to respond.

 

MrDude_1 i definitly value your opinion on this you seem to be a fairly knowledgeable person on this board.

What youre saying actually makes a lot of sense, i was orignially thinking cage and sfc's but never thought about the added weight of the sfc's

The question i pose to informed people (please have valid reasoning to back up your opinion not just heresay) my car currently makes 400 lb ft but lets use a car for example making around 500 lb ft.

In that 500 lb ft cenario is a 6 or 8 point cage (iirc an 8 point is useless in these cars because the extra two points just mount to the floor pan?) would the 6 point cage be enough to eliminate chassis flexing (that is currently putting cracks in my paint in the top corners of my windows) to the point where the added sfc's wouldnt be warranted over the weight they would add.

 

yup.

now if you cut the doorbars and make it a swingout rollbar, then you'll still have flex.. but leaving them straight, you have a large triangle holding the car stiff, instead of a flat bar.