Treecutter
Junior Member
I see that they are sold to fit the 05-09 cars but never see anyone recommend adding them. Are they needed or are they a thing of the past?
Subframe connectors?
- Thread starter Treecutter
- Start date
General consensus is not needed on this chassis
I would say not needed until you get to a serious power level that you need to solidify the chassis some.
I have been putting on sub-frame connectors on all my Mustang's; Fox, SN95 and S197. Any car that is unibody benefits from having its chassis connected. I run my cars hard and most make decent power, so having the frame rails tie together (welded) is a big plus for me. They track straight, alignment is perfect and launch properly. Obviously, suspension has a lot to do with it too...
For a couple of hundred bucks, you get extra ridged (especially if you own a convertible) and less chance of distorting the frame, wrinkling the floor pan or pulling out a control arm from torque box. Also, might aid in a collision...
Either way, opinions are like... LOL
For a couple of hundred bucks, you get extra ridged (especially if you own a convertible) and less chance of distorting the frame, wrinkling the floor pan or pulling out a control arm from torque box. Also, might aid in a collision...
Either way, opinions are like... LOL
The key is welding them in and welding them in properly.
AGREED
I have a chassis shop do all my welding. Prep, grounding and the actual process in welding sections and even around some sensitive areas are all very important.
Always been interested in welding, but not my specialty, so I farm it out to the experts.
I have a chassis shop do all my welding. Prep, grounding and the actual process in welding sections and even around some sensitive areas are all very important.
Always been interested in welding, but not my specialty, so I farm it out to the experts.
I used steeda chromolly steel subframe connectors, bolted and welded. That, plus a 1/4" thick BMR rear tunnel brace...+ safety loop. Then a steeda rear STB, in the trunk, welded into place. Back end of car is more..'solidified'. Then in went the eaton - detroit tru-trac LSD and also the whiteline watts link, and also the DSS-DS. Last item that went in was the steeda CM jacking rails down each side. Ok, now everything works the way I want it.
sportinawoody
!@#$%^&*(
unless you have a convertible, they're not needed. I have a vert so they greatly benefited my car
I’m
Do you recommend them still?
old post and all, but this link will be relevant for the drag racing forum. Info from a shop that builds Cobra Jets:
scroll down about 1/3 of the page to the section on the rear lower control arm mount and the LCA mount support/frame connector.
scroll down about 1/3 of the page to the section on the rear lower control arm mount and the LCA mount support/frame connector.
GriffX
Senior Member
They claim the S197 is very stiff car ?
motoiq.com
Project Budget 400WHP S197 Mustang Track Car: Part 1 - Intro - Page 2 of 4 - MotoIQ
S197 Mustang GTs aren’t featherweights, but it’s not hard to get weight out of them. More importantly, you can stuff massive tires under the fenders to give it a far…
motoiq.com
This has been discussed before… S197 are stiffer than SN95 and Fox, but just like the newer Mustangs S550 & S650 which are stiffer than ours, it's the advancement in engineering and materials. As always, there is room for improvement while sometimes sacrificing some increase in NVH.
I like the structural rigidity and lack of flexing while cornering. Also, I believe they will protect you in a collision too. I don't mind the slight stiffness at all, but that's just me and my .02 cents.
I like the structural rigidity and lack of flexing while cornering. Also, I believe they will protect you in a collision too. I don't mind the slight stiffness at all, but that's just me and my .02 cents.
Robert Larimer
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The S197 chassis is based on the Jaguar S type and Lincoln LS modified for a solid rear axle of course. I found an interesting comparison of stiffness here.
This chassis was extremely rigid with a torsional stiffness of 21,000 Nm/degree. This was a substantial improvement over the previous SN95 chassis which was effectively the end result of a 27-year-old chassis and suspension layout design that originated in the 1978 Foxbody Mustang.
By comparison:
4,881 Nm/deg – NA Mazda Miata
7,100 Nm/deg – Honda S2000
9,100 Nm/deg – Chevrolet C5 Corvette
12,500 Nm/deg – BMW E46 Coupe
14,500 Nm/deg – Chevrolet C7 Corvette
22,500 Nm/deg – BMW E90
23,000 Nm/deg – Ferrari 360 Modena
https://motoiq.com/project-budget-400whp-s197-mustang-track-car-intro/2/
This chassis was extremely rigid with a torsional stiffness of 21,000 Nm/degree. This was a substantial improvement over the previous SN95 chassis which was effectively the end result of a 27-year-old chassis and suspension layout design that originated in the 1978 Foxbody Mustang.
By comparison:
4,881 Nm/deg – NA Mazda Miata
7,100 Nm/deg – Honda S2000
9,100 Nm/deg – Chevrolet C5 Corvette
12,500 Nm/deg – BMW E46 Coupe
14,500 Nm/deg – Chevrolet C7 Corvette
22,500 Nm/deg – BMW E90
23,000 Nm/deg – Ferrari 360 Modena
https://motoiq.com/project-budget-400whp-s197-mustang-track-car-intro/2/
FYI 1979 first year of the fox platform until 1993 with a slight revision for the SN95 from 1994-2004.
As stated… the Mustang and most manufacturers get improvements and upgrades with their structural engineering and technology over the years. Not perfect but that’s the progression of the modern automobile.
As stated… the Mustang and most manufacturers get improvements and upgrades with their structural engineering and technology over the years. Not perfect but that’s the progression of the modern automobile.
confidenceman
Junior Member
yes you are right.
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