weld or bolt in SFCs

[Formula Z]

just wondering which is better. also boxed or tubular. i dont have access to a welder so i will have to find someone who knows how to weld and pay them. also i dont believe my car has relocation brackets and it has been lowered but i dont get the wheel hop like everyone complains of. i do spin off the line although. thanks

[pHEnomIC]

It's all about preference. functionally, weld ins are theoretically better as they actually become a part of your frame. Bolt ins work fine but some people have issues with bolts coming loose and stuff. I like the convenience of boltons, they were easy to install, i can always weld em if i want, and I can remove them if I need to.

[Phantom409]

Here is what I have, UMI
Still have to put them on yet
They are weld in, way better!!!

[JoeliusZ28]

weld-ins are always better, but bolt-ins are better than nothing as well as weldable.

if you weld your SFCs in the weight of the car must be on its own wheels..

[Keego Ridah]

Weld-in's, no questions asked

[Formula Z]

thanks guys and im think tubular also because it will match the rest of the suspension mods going in.

[ITSSLOW]

My plan is just a 2pt weld on. Im guessing I'll end up with boxed because that's what most seem to be.

[tenpin842]

Mine are still in the box too. (cough Justin cough)
I bought the spohn tubular SFC's weld on ones.

[DanO]

wow.... i guess im in the minority

I'd like you to prove the strength differences between weld in and bolt on. First you would have to define the load paths.

In Torsion, the bolt ons would be equally as stiff, For longitudinal forces, the weld in may be better due to the clamp load of the front mount.

But, the nice thing about bolt ins.... they can always BECOME weld in's!!

Also, it depends on the load direction for comparing tubular to square. Just remember, once you have a bend in a round tube, its compression/tension strentght is completely comprimised and is now a function of the geometry not the steel.

either way, i'd get bolt ins, and if you like it.. weld em in. I have not seen an ideal set of SFC's yet. I like my SLP's but they are slightly heavy and one of the square tubes has a bend in it!! But alot of the other designs have bends too.. so i guess they are all about equal.

either way, i'd get a 3 point mount, dont even waste your time with 2 point if you are doing SFC's.

Just to prove my point, the 3rd point mount is on a spot welded piece of sheetmetal.. i highly doubt there is much force going through the SFC's if this area has not been comprimised.

I think we should strain gauge some SFC's to get a true answer!!!!!!

[MiT/A'96]

IMO...Weld on,box ,two pionts..

[BP_Z28]

Im going to have to agree with Dan on this one!

[Formula Z]

my only concern with the 3 point is that it would need to be removed whenever you are working on the underneath of the car

[MORNINGSTAR2101]

i think weve had this discussion like a million and a half times before. the general consensus is to go with the weld ons

[Formula Z]

i think weve had this discussion like a million and a half times before. the general consensus is to go with the weld ons

sorry

[Phantom409]

sorry