Steeda Subframe Brace 0-60 Improvement

[WERA49]

What 0-60 MPH improvement should I expect from the installation of Steeda rear subframe brace?

I searched this forum, but couldn't find the answer. Everyone loves the improved chassis feel, but I'm curious about numbers.

I'm going to buy them soon.

https://www.steeda.com/steeda-s550-mustang-rear-irs-subframe-brace-2015-coupe-555-5754.html

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[Cory S]

Nothing measurable. Good upgrade for road course racing. That’s it.

 

[shogun32]

If you want to improve feel, and perhaps launch with time improvement, you need to address ALL the warts in the rear chassis and IRS

 

[TonyNJ]

I clicked on this post thinking you were going to tell us. Please let us know after you install it.

 

[S550 Recon]

All it really does is add weight. So it shouldn't improve it at all.

 

[Det_Riot]

You wont see improvement in the time, however you will see a substantial decrease in instances where your wheel hops, and a substantial increase in the rear end feeling planted to the ground while launching or cornering

 

[tj@steeda]

The Steeda IRS Chassis Braces are hands down our most popular & most successful product for the S550. If these weren't as good as advertised ... you would see much more feedback on the forum ... but that's not the case.

Here are some of the benefits of the Steeda braces:

1. Improved Stability: The IRS Chassis Braces help reduce chassis flex and torsion, resulting in improved stability during aggressive cornering and high-speed maneuvers. By minimizing unwanted suspension movement, the braces enhance the overall rigidity of the rear suspension system.
2. Enhanced Handling: The increased chassis rigidity provided by the braces helps to maintain better tire contact with the road surface, resulting in improved traction and more precise handling. This is particularly beneficial when pushing the limits of the vehicle's performance on track days or spirited driving. This will also help in your 0-60 times.
3. Reduced Wheel Hop: Wheel hop is a common issue in high-performance vehicles with independent rear suspension. It occurs when the rear tires momentarily lose traction under hard acceleration, causing a hopping or skipping motion. The IRS Chassis Braces help to mitigate wheel hop by reducing flex in the suspension, resulting in improved traction and a smoother launch.
4. Easy Installation: The Steeda IRS Chassis Braces are designed as bolt-on components, which means they can be installed without major modifications or welding. This makes them a convenient upgrade for enthusiasts who want to enhance their vehicle's performance and handling without extensive modifications - without requiring an alignment.

Check out our site here for a full list of reviews on the subject:

https://www.steeda.com/steeda-s550-mustang-rear-irs-subframe-brace-2015-coupe-555-5754.html

 

[mikengail]

What 0-60 MPH improvement should I expect from the installation of Steeda rear subframe brace?

I searched this forum, but couldn't find the answer. Everyone loves the improved chassis feel, but I'm curious about numbers.

I'm going to buy them soon.

https://www.steeda.com/steeda-s550-mustang-rear-irs-subframe-brace-2015-coupe-555-5754.html

My understanding is that it mostly helps eliminate wheel hop so that, with the right tire/air pressure, you can hook up, without breaking your stock half shafts. I have a Convertible that already has stock subframe bracing so the Steeda units won't fit my car. I did the Steeda IRS Subframe Alignment Kit (555-4438), Steeda IRS Subframe Bushing Support System (555-4437) and the Steeda Mustang Billet Aluminum Vertical Links (555-4121).

No more wheel hop with Nitto NT05R Drag Radials. Plus, she doesn't want to swerve all over the place when the Summer Radials get to spinning on the street. Very controlled rear wheel spin. I don't have a roll bar or cage for my local drag strip, as a supercharged convertible, so I haven't been able to test any launch time improvements. But, if your car is wheel hopping, she's not hooking up and that alone, I think, would improve launch times.

By the way, that bottom bolt on the Vertical Links is more than just a little challenging to line up. I was cursing in Martian, by the time I finished that job...

 

[ChitownStang]

The Steeda IRS Chassis Braces are hands down our most popular & most successful product for the S550. If these weren't as good as advertised ... you would see much more feedback on the forum ... but that's not the case.

Here are some of the benefits of the Steeda braces:

1. Improved Stability: The IRS Chassis Braces help reduce chassis flex and torsion, resulting in improved stability during aggressive cornering and high-speed maneuvers. By minimizing unwanted suspension movement, the braces enhance the overall rigidity of the rear suspension system.
2. Enhanced Handling: The increased chassis rigidity provided by the braces helps to maintain better tire contact with the road surface, resulting in improved traction and more precise handling. This is particularly beneficial when pushing the limits of the vehicle's performance on track days or spirited driving. This will also help in your 0-60 times.
3. Reduced Wheel Hop: Wheel hop is a common issue in high-performance vehicles with independent rear suspension. It occurs when the rear tires momentarily lose traction under hard acceleration, causing a hopping or skipping motion. The IRS Chassis Braces help to mitigate wheel hop by reducing flex in the suspension, resulting in improved traction and a smoother launch.
4. Easy Installation: The Steeda IRS Chassis Braces are designed as bolt-on components, which means they can be installed without major modifications or welding. This makes them a convenient upgrade for enthusiasts who want to enhance their vehicle's performance and handling without extensive modifications - without requiring an alignment.

Check out our site here for a full list of reviews on the subject:

https://www.steeda.com/steeda-s550-mustang-rear-irs-subframe-brace-2015-coupe-555-5754.html

Would these be beneficial on a Mach 1 suspension? It has subframe parts from the Shelby's so maybe not worth it?
I'm looking to improve traction

 

[TeamSteeda]

Would these be beneficial on a Mach 1 suspension? It has subframe parts from the Shelby's so maybe not worth it?
I'm looking to improve traction

Hi there - Tim pinged me in to share some personal experience with the Mach 1 and adding our Steeda IRS Subframe Support Braces. In my opinion, they offer the same benefit as they would on an EcoBoost or GT. They add additional support triangulating the load on the rear subframe with the rest of the chassis. Yes, the Mach 1 does have some unique bushings and other small changes over the standard GT, but the benefits of adding the braces are well worth the upgrade on the Mach 1.

Check out this video of some suspension testing we did on the Mach 1. Hope this helps!

 

[ChitownStang]

Hi there - Tim pinged me in to share some personal experience with the Mach 1 and adding our Steeda IRS Subframe Support Braces. In my opinion, they offer the same benefit as they would on an EcoBoost or GT. They add additional support triangulating the load on the rear subframe with the rest of the chassis. Yes, the Mach 1 does have some unique bushings and other small changes over the standard GT, but the benefits of adding the braces are well worth the upgrade on the Mach 1.

Check out this video of some suspension testing we did on the Mach 1. Hope this helps!

Thanks Chris, Since I put a Flex tune on and run e85, the extra power is hard to put down, I spin a lot. Will the brace help with that?

 

[shogun32]

Would these be beneficial on a Mach 1 suspension? It has subframe parts from the Shelby's so maybe not worth it?
I'm looking to improve traction

Did you do everything else first? The braces are icing. Pointless without the rest of the cake. Unless you're the kind that just eats canned icing out of the can with a spoon.

 

[TeamSteeda]

Thanks Chris, Since I put a Flex tune on and run e85, the extra power is hard to put down, I spin a lot. Will the brace help with that?

There are a lot of other factors that go into why you may be spinning tires. Tire compound, spring rate, damper settings, etc. The IRS Subframe Braces were engineered to aid/reduce wheel hop and remove any unnecessary movement in the rear subframe. This goes for 60-foots at the dragstrip and putting power down effectively on corner-exit while road racing. Hope this helps!

 

[mikengail]

Thanks Chris, Since I put a Flex tune on and run e85, the extra power is hard to put down, I spin a lot. Will the brace help with that?

I think that the first place to start for traction is always tires. I like the Nitto NT05R's for drag racing, because they have a really soft compound that sticks hard for my car with 650+ rwhp and they have decent enough tread to drive to the strip. No changing tires/wheels when I get there.

However, there is a serious caveat to going straight to drag radials or slicks on a Gen3 Mustang. I don't remember which vendor it was (Steeda or Lethal, perhaps?) that took a new 2018+ Mustang GT A10 to the strip with a set of drag radials to try to get a better time over the stock tires. They broke the stock left half shaft. I think that afterward, they upgraded to some expensive 3rd party or Ford Racing half shafts and added some additional IRS mods. My understanding is that the stock half shafts on a 2018+ Mustang GT will not tolerate wheel hop even on a pure stock configuration. The left side or driver's side shaft usually fails.

After I installed a supercharger kit on my car, I upgraded to GT350 half shafts and installed Steeda's S550 Mustang Subframe and Alignment Support Kit (555-4450). No wheel hop and she quit trying to do a 180 when spinning the rear tires on the street. Two weeks ago, I installed the Steeda Vertical Links and she doesn't even wander or swerve in the back when spinning the rear tires, keeping nice and straight.

Beyond the IRS Subframe Braces, I don't know how much better the Steeda parts that I mentioned are than what's on a Mach-1, if at all. I do know that they are miles ahead of stock S550 GT parts. Focus on the tires, after you're sure that you've eliminated the wheel hop...

 

[ChitownStang]

Thanks for the input Mike. I’m not drag racing and I’m not experiencing much wheel hop. It just seems like the 275 PS4’s don’t hook up well at all.
Maybe I’ll just get wider tires eventually.
Just never had this issue before the Flex tune.

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