GT Performance Mods 2005+ Mustang GT Performance and Technical Information

bmr subframe connectors vs. steeda Frame Rail & Torque Box Brace

Old Jul 10, 2007 | 04:28 PM
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bmr subframe connectors vs. steeda Frame Rail & Torque Box Brace

hi all.
anyone care to comment on these? which one works better?

steeda frame rail:
http://www.stangsuspension.com/store...idproduct=1021

BMR subframe connectors:
http://www.stangsuspension.com/store...?idproduct=636

thanks all!
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Old Jul 10, 2007 | 08:55 PM
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I have the BMR boxed subs and they really do stiffen up the body and that's what I was looking for when I installed them.. Since I don't drag race, I wasn't to concerned about beefing up the torque boxes.

Steeda's torque box brace is more suited for drag racing than for a general improvement in the overall rigidity of the body. Steeda said, it had determined that the new mustang doesn't need full length subs to be a good handling platform. I have my doubts about that... But, that's just my opinion..

If you are going to drag race.. the Steeda piece could be the best buy for you, if you just want a good solid platform to build on.. then you might want the BMR boxed subs. It all depends what you want from your car.

Bobby M.
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Old Jul 10, 2007 | 09:10 PM
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Originally Posted by MooStang05gt
I have the BMR boxed subs and they really do stiffen up the body and that's what I was looking for when I installed them.. Since I don't drag race, I wasn't to concerned about beefing up the torque boxes.

Steeda's torque box brace is more suited for drag racing than for a general improvement in the overall rigidity of the body. Steeda said, it had determined that the new mustang doesn't need full length subs to be a good handling platform. I have my doubts about that... But, that's just my opinion..

If you are going to drag race.. the Steeda piece could be the best buy for you, if you just want a good solid platform to build on.. then you might want the BMR boxed subs. It all depends what you want from your car.

Bobby M.
hi bobby! thanks for the info.
im probably NEVER going to drag race. i want to tighten up the body so the car feels and solid.

it seems like the BMR would do the trick however, if the steeda are great for drag racing wouldn't it also be great for day to day type SOLID car feel?

thanks again!
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Old Jul 10, 2007 | 09:55 PM
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I think the BMR boxed subs are really what you want. They will really increase the stiffness of the entire body. You want your car to feel solid and tight, they will do the trick.. and any other suspension mod that you do to your car will perform that much better because of the subs.

The older Fox and SN95 mustangs had very weak torque boxes. Consequently, drag racers were always breaking the welds and twisting them up during hard launches.. That's why most of them ended up welding additional steel plates inside the torque box area.

Either of the pieces will help improve your cars performance, but I think what you are looking for is better served by the subs.

Bobby M.
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Old Jul 10, 2007 | 09:58 PM
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thanks bobby!

i think bmr subs is the way im gonna go as well as the bmr floorpan tunnel brace.

http://www.stangsuspension.com/store...?idproduct=638
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Old Jul 11, 2007 | 06:23 AM
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please post some pictures when you recieve them and then after they are mounted.
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Old Jul 11, 2007 | 06:25 AM
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I have spent a lot of time under the S197.

Just because the last generation needed them doesn't meen the new ones do.

Why bolt or weld an extra 60 lbs of useless junk on your car???

There are no subframes to connect.
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Old Jul 11, 2007 | 06:45 AM
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Originally Posted by Reality Check
I have spent a lot of time under the S197.

Just because the last generation needed them doesn't meen the new ones do.

Why bolt or weld an extra 60 lbs of useless junk on your car???

There are no subframes to connect.
Exactly right. If you look under the car you will see a full frame rail front to rear. There are no separate subframes to connect. That is why when you look for a list of companies making subframe connectors for the 05, the list is very short compared to the number of companies making them for the 04-earlier cars.

Although most companies making them acknowledge that the 05 chassis is stiffer, the numbers they give for the increase in rigidity are much lower than they actually are.

We only address the areas that need addressing while keeping weight increase to a minimum because weight is the enemy of performance. That is why you don't see us manufacturing subframe connectors for the 05+ vehicles.

Gus
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Old Jul 11, 2007 | 07:26 AM
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hey gus, i wanted to know if the torque boxes give enough room for something like the cervinis side exhuast and for anyone else do either of these give enough clearence for the side exhuast, i want to add the cervinis kit but do not want to spend on the subframes if it means no side exhuast
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Old Jul 11, 2007 | 07:32 AM
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Originally Posted by SteedaGus
If you look under the car you will see a full frame rail front to rear.
Lollerskates! Please provide picture of said frame rail.
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Old Jul 11, 2007 | 07:54 AM
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Originally Posted by SteedaGus
Exactly right. If you look under the car you will see a full frame rail front to rear. There are no separate subframes to connect. That is why when you look for a list of companies making subframe connectors for the 05, the list is very short compared to the number of companies making them for the 04-earlier cars.

Although most companies making them acknowledge that the 05 chassis is stiffer, the numbers they give for the increase in rigidity are much lower than they actually are.

We only address the areas that need addressing while keeping weight increase to a minimum because weight is the enemy of performance. That is why you don't see us manufacturing subframe connectors for the 05+ vehicles.

Gus
Hi Gus,
thanks for the explanation. I know your steeda frame rails are only like 5.6 lbs each. Is that enough to make the car feel nice and solid?

Can you give a brief explanation on how that works as compared to subframe connectors?

thanks again!
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Old Jul 11, 2007 | 07:56 AM
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Originally Posted by Bullitt995
Lollerskates! Please provide picture of said frame rail.
What for? So you dont have to get dirty looking under a car?
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Old Jul 11, 2007 | 07:57 AM
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Originally Posted by RedDragon777
hey gus, i wanted to know if the torque boxes give enough room for something like the cervinis side exhuast and for anyone else do either of these give enough clearence for the side exhuast, i want to add the cervinis kit but do not want to spend on the subframes if it means no side exhuast
I cant answer this question with certainty as I have not had a car in the shop with their side exhaust to test. I'm not aware of any customer that may have tried this with success but I'll ask the rest of my team if they have had customers try and get back to you.

Gus
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Old Jul 11, 2007 | 08:27 AM
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Originally Posted by SteedaGus
What for? So you dont have to get dirty looking under a car?
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Old Jul 11, 2007 | 08:42 AM
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Originally Posted by SteedaGus
What for? So you dont have to get dirty looking under a car?
I'd love to see pictures of a unibody car that has a full frame rail. You must have a one off or something.
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Old Jul 11, 2007 | 09:05 AM
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Originally Posted by YaoNYC
Hi Gus,
thanks for the explanation. I know your steeda frame rails are only like 5.6 lbs each. Is that enough to make the car feel nice and solid?

Can you give a brief explanation on how that works as compared to subframe connectors?

thanks again!
You'll mostly feel the difference over hard bumps. I drive over rail road tracks every day and noticed the difference going over those with my car. In normal driving on smooth roads you probably would not notice the difference under those conditions.

The difference I noticed was the rear suspension feeling more solid, like it was soaking the bumps better and absorbing the impacts more effectively transmitting less shock into the body.

Gus
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Old Jul 11, 2007 | 09:10 AM
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You know how the old saying goes: "You can't teach an old dog new tircks."

Until you can take a mustang and remove the body and leave a frame with the chassis attached, I will continue to believe that connecting the front and rear sheet metal with subframe connectors has got to strengthen the the body.

The additional weight might be to much for the likes of some, but not me.. That's why subs were the first under the car mod I did.

It's all a matter of personal preference.

Bobby M.

P.S... You CAN'T use side exit exhaust with boxed subs..
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Old Jul 11, 2007 | 09:20 AM
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Originally Posted by MooStang05gt
Until you can take a mustang and remove the body and leave a frame with the chassis attached, I will continue to believe that connecting the front and rear sheet metal with subframe connectors has got to strengthen the the body.
Exactly! If you can't pull the body off of a "frame" it's not a full frame car.
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Old Jul 11, 2007 | 10:14 AM
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I never said that there were no separate subframes, simply that there already is a beefy frame rail tying the front and rear of the car. Again look under the car and you will see it.

We have the engineering data on chassis rigidity straight from Ford. The car is much stiffer than the people who will sell you subframe connectors will tell you.

We could just jump on the bandwagon and make a part just to make money. Thats not our style. Let other people do that. We'll stick to what the car really needs.

Gus
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Old Jul 11, 2007 | 12:48 PM
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Originally Posted by SteedaGus
I never said that there were no separate subframes
Originally Posted by SteedaGus
There are no separate subframes to connect.
Really? Scroll up half a page.

I knew what "frame rails" you were talking about. Those really aren't frame rails and they shouldn't be called that. I'm not sure what they actually are but they are part of the body itself and actual frame rails are not part of the body.
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