Looking to put koni yellows , and a borla s type axle back on my 2012 super charged Mustang Gt any feedback Thanks 😊

 

Just a heads up! Submitting duplicate post threads will not provide any faster feedback support.
2012 super charged Mustang Gt premium

 

I know didn't realize it until I saw it twice my bad...

 

You may also want to consider searching the sub-forums by selecting the search function menu.. It's located next to the quick links, followed by vendor directory, TMS Live and finally log out.. When the search box window displays, type in Koni yellows and then afterwards repeat the same steps and type in borla s type axle backs 2012 mustang gt.. You'll then come across a listing of threads which address the topic your searching for.. Meanwhile, hope you'll find this useful and also welcome aboard.

 

not sure which thread to reply to, I guess I'll go with this one . . . which probably belongs in the 2010-2014 Mustang GT tech sub-forum.

It's practically impossible to make a good recommendation, if we don't know what you want; what you have in mind and what are your preferences. Searching the existing posts is a good way to find out what other people have been doing and considering, if you don't really know what you want.

Why Koni Yellows? Do you plan to run the car on road track? Do you want/need the adjustability?

Why Borla S type? Do you want it super loud? Is the rest of the exhaust currently stock, or has it been modified? Do you care about drone inside the car?

 

Agree there are a bunch of choices and it will all depend on what you are after. Obnoxious or just a great exhaust sound. Rough stiff ride or great handling. Tell us your goals, where you want to take the car, and budget and maybe we can give you a few pointers.

 

Just as suggested, search the existing threads in the 2010-2014 GT tech sub-forums.. When it comes to exhaust systems, sound is matter of personal preference and often interpreted differently from one person to another.. What may sound too loud from one person, might sound the complete opposite to another.. The most effective way to determine if the exhaust system your interested in is the right one that meets your expectations, is listening in person from anyone you might know who also has a 2011-14 GT that has Borla S- type axle backs, or listen to videos on YouTube which may also be helpful as well..

Regarding the Koni Yellow adjustable dampers, I can tell you from personal experience, they do indeed significantly improve handling and most definitely improve the stability of the suspension.. However, if your main concern is ride comfort over improved handling of the suspension? you may be very disappointed.. When adjusted at the full soft setting, your still going to notice quite a difference in stiffness over the OEM dampers and you will feel practically every road imperfection and bump, but just keep in mind, this is just through my own personal experience.. Therefore, once again, if your main concern is ride quality, I would select Bilstein B6 dampers over Koni Yellows, hands down IMHO.

 

I put Koni yellows and Steeda sport springs on my 2012. The springs lowered the front 2 tenths. (Insignificant amount but that’s what’s advertised) Rear 1.5 inches. Full soft it’s firm but not brutal. Full stiff it’s more harsh. Handling is very good. On the track I run it 1.5 turns from full soft and it is very planted. I’m very happy with that combination on an otherwise stock car.

 

Also keep in mind the type of springs paired with the Koni yellows will also be a factor as well.. If running a linear type spring, the ride quality is going to be much firmer even on full soft setting over OEM.

If paired with a progressive spring, like Steeda sport springs and from Ford performance, the ride quality will be softer, but more firm over OEM/stock.

 

I had it wrong. “Performance” springs.

 

Are the Steeda performance lowering springs considered a progressive rate type spring or linear type spring

 

Now is that African or Euoropean...?

 

. . . and what is their air speed velocity? well I don't know that . . .

 

Well here's the official definition between progressive rate vs linear spring rates for those who obviously don't know the difference...LOL

https://www.cjponyparts.com/resource...essive-springs

MUSTANG LINEAR VS PROGRESSIVE SPRINGS

Last Updated December 21, 2021 | Bill TumasSo, you’ve decided you want to lower your Mustang. Whether it’s to tie those new aftermarket wheels and tires in with the rest of your car or for better handling on the autocross course, it is time to shop for lowering springs. Finding the right set of lowering springs for your Mustang can be frustrating due to the various different brands, types, and spring rates available. Some springs offer a smoother, more controlled ride, where others are more direct and transfer more vibration to the cabin so you know exactly what each corner of your car is doing.

Linear springs offer a more direct ride that has a linear spring rate all the way through the spring. This means that as the spring compresses, the spring rate stays constant throughout the entire compression. So, when you are taking corners with a car that is set up on linear springs, the resistance your shocks/struts and you are receiving through the steering wheel is constant. All things being equal, a car on linear springs is going to be easier to navigate on a road course or track, but will more than likely have a rougher ride than progressive springs.

Linear vs Progressive Springs

Progressive springs have grown in popularity with late-model Mustangs because of the two-sided benefit they offer. On the one hand, you are going to get the benefits of a lowered car - better handling, reduced nose dive, and decreased body roll. On the other hand, a progressive spring will offer a better ride quality than a linear spring, and sometimes even factory springs! This is due to the engineering behind a progressive spring. As a progressive spring compresses, the spring rate will gradually increase. Meaning if you’re cruising down the highway and your Mustang approaches a couple of small bumps in the road, you will feel minimal feedback in the chassis since you’re not exercising the springs fully. However, if you tackle an autocross or road course on progressive springs and put them through more abuse, they will deliver with a higher spring rate, offering a stiffer ride and more responsiveness the corners get sharper. It is said that cars on progressive springs may be the best of both worlds but can be a bit tougher to predict on the racetrack due to their constantly changing spring rate.


RELATED CATEGORIES

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WHY SHOULD I GO WITH LINEAR SPRINGS ON MY MUSTANG?

Lowered S197 Mustang with KMC Wheels.

Good question! If you’re the type of Mustang driver who doesn’t mind trading a slightly rougher ride for better overall handling, then linear springs may be the choice for you!

An example of a linear spring rate would be: 750 lb/in. This means that it will take roughly 750 pounds of force to deflect the spring one inch. Another 750 pounds will be needed to deflect the spring an additional inch, and so on. The linear name comes from the fact that the rate of deflection is constant throughout the entire spectrum.
Below you’ll find a couple of reasons why linear springs may be a better choice for you and your Mustang.

• Handling Feel: We’re not talking about handling capability; we’re talking about the overall feel you get from the suspension components working in unison as your car takes a turn. This is how your suspension communicates with your chassis and in turn, communicates with you as you’re cornering at speed. It’s a simple fact that linear springs will communicate better than progressive springs due to the predictability of a constant spring rate.
• Not A Daily Driver: Is your Mustang a Weekend Warrior? Great! Linear springs may be a good choice for you since a rougher ride quality won’t be at the top of your list.
• Handling > Ride Quality: If you value handling more than ride quality, then linear springs are the way to go for you.

WHY SHOULD I GO WITH PROGRESSIVE SPRINGS ON MY MUSTANG?

Steve Gelles' Lowered Mustang with Velgen Wheels

Progressive springs are the right choice for the majority of the Mustang owners that are reading this. Progressive-rate springs are the lowering springs that one would get if their Mustang is generally a street car that occasionally makes an outing to the track or dragstrip on the weekends. Progressive springs offer the best of both worlds when it comes to that lowered look, better handling and a smooth, stock-like ride quality.

For those of you out there with 2015+ Mustangs trying to figure out which springs are best for your build, check out the CJ Pony Parts springs on our 2015 GT driven by Rick in our Purchasing Department. The CJPP Springs use a progressive front spring rate and linear rear spring rate to maintain ride comfort but drastically increase overall handling response and performance.

If you’re still on the border, you’ll find a couple reasons why progressive rate springs may be a better choice for you below.

• Better Ride Quality: In comparison to linear lowering springs, progressive lowering springs will offer a smoother, more enjoyable ride.
• Your Mustang Is a Daily Driver: If your Mustang is a daily driver and you’re constantly in the driver’s seat, you’re probably not going to want a rough ride.
• Ride Quality > Handling: If you’re willing to sacrifice a little bit of handling

 

Good stuff about the progressive springs -- I guess I should read all that sometime, right now I only skimmed . . .

The idea of progressive springs makes sense to me, but in my limited experience, I'm not sure I like the real result. I used to have Steeda Sport linear springs on my car, and I liked the way it rode. It was fairly firm, but stable. Recently I changed to Ford progressive springs (along with Bilstein struts/shocks) and now the ride seems very "jittery." It is hard to describe or make a direct comparison, and it is very subjective . . . but it just seems bouncier, almost like it amplifies every bump. I could feel pretty much everything with the Sport springs, but everything seems "bouncier" with the FRPP "P" springs.

 

Until coming across the article from CJ Pony Parts, I had always assumed that progressive springs provide more of firm ride quality over linear springs, but according to the article from CJ Pony. it appears it's the complete opposite.. All I know for certain is since making the switch to Eibach Pro Springs which are progressive type springs along with upgrading to Koni Yellow adjustable struts/shocks, the ride quality is noticeably much firmer and bouncier compared to OEM/stock, even when adjusted at the max soft setting..

At any rate, I continue to wonder if it's the Eibach springs or Koni Yellow struts/shocks as the reason for causing the bouncier ride quality

 

With the Koni’s and Steeda springs my car is much more firm and you feel bumps more but it is a one time per bump hit. Definitely not bouncy. I wouldn’t want to go more firm but the way it is now is livable and the handling is pretty good.

 

well we sure went on a tangent while waiting for the OP Montyv63 to come back, LOL

I still have my Steeda Sport springs and I've been thinking about putting them back on, just haven't psyched myself up for the job yet

 

Then I'm really stumped here.. Therefore, If the article by CJ Pony Parts is accurate, then how is it that a linear design Steeda sport spring provides a softer ride quality over a progressive design like Eibach Pro Springs?

Needless to say, I was always under the assumption that progressive design springs produce more of a stiffer/firm ride quality over linear design springs, but according to CJ Pony Parts, they claim it's completely the opposite

If the CJ Pony article is accurate? your current Ford Performance progressive springs are supposedly designed to provide a smoother ride quality over your Steeda linear design Sport Springs...

Just doesn't make much sense IMHO

 

It doesn't make sense to me either

I wouldn't really call it "softer" with the linear Steeda Sport springs . . . it was firm, but less "jittery" and I don't really understand what is going on. Could be purely subjective perception. I think maybe the softer initial spring rate allows the suspension to move more over bumps, which makes sense, that's what it is for . . . but then on rebound it seems to "jump" more . . . which suggests that the shocks/struts don't have enough rebound damping, but that doesn't make sense to me either, because they are new Bilsteins which are supposed to be well matched to those springs.

If I ever do get around to putting the Steeda Sports back, I'll probably find out that this was all wrong and just not remembering right how it used to be, LOL