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7/25/2017 6:17 am  #1

S550 Mustang IRS

Has anyone done any analysis or dimensional data on the 2015 Mustang IRS. Unless my searching was incorrect, I am not seeing any data on it in this forum

? ? ?



8/05/2017 1:36 am  #2

Re: S550 Mustang IRS

PaulPeroe wrote:

Has anyone hired these Tunbridge Wells accountants or done any analysis or the dimensional data on the 2015 Mustang IRS.


I haven't Paul but I'd like to see some analysis too.

Last edited by SteveHar (8/10/2021 6:13 am)


8/30/2019 12:49 pm  #3

Re: S550 Mustang IRS

I just purchased a 2015 GT 5.0 Torsen IRS (on 08/27) from the Parts Farm in Lyons, GA. My plan is to install it in my '65 Mustang FB. It looks like I will need to have a custom frame fabricated and I will most likely use Daze's carriage approach for mounting, I am having an additional set of forward spring clips inside the frame rails for the mounting carriage.  I plan to maintain the existing Ford geometry but am looking at fabricated upper and lower control links to go with the custom frame. The difference in width is significant between the '65 and the '15 (about 7") this will require custom 1/2 shafts to make this fit. I am having mini tubs installed and the MTF full frame C-6 front suspension.  Paul, 1965 Mustang FB, Woodstock, GA


8/30/2019 1:45 pm  #4

Re: S550 Mustang IRS

I built my cobra rear end very similarly. Used half shafts from The DriveShaft Shop. They use Porsche 930 style halfshafts with adapter ends to match the Ford components.


     Thread Starter

2/05/2020 3:34 pm  #5

Re: S550 Mustang IRS

This is a copied post from Stangnet for a S550 IRS cradle. The company is Techno Engines out of Moscow, Russia. 

Hi! We have developed a new irs for the mustang. It is based on s550 components. improved geometry with adjustable toe link. It will be great to work on the track and comfortable on the road. For installation will require a modification of the body, similar to the installation heids IRS. We use energysuspension bushing for easy replacement if necessary. The subframe is assembled from seamless pipes by tig welding. Everything is modeled in the CAD and FEA analyzed to achieve maximum strength with minimum weight. A lot of work has been done and this allows us to get better controllability than when using other solutions. We have just started production and I am looking for people who will be interested in our IRS. We can complete the system for any wheel diameter and used coilovers. If you are interested in this, you can ask me your questions and I will provide you with additional information. 
This was posted on the Stangnet Forum. These folks are located in Moscow, Russia and say they can build you the frame for $5000 and a month fab time. They are involved in the Russian Restomod activities.They can be contacted at Their company name is TechnoEngines. I like the look of their product, but I am not crazy about doing business with Russia.

Last edited by Paul65FBProject (2/07/2020 4:25 am)


2/06/2021 1:32 pm  #6

Re: S550 Mustang IRS

I am looking for a fabricator in the Atlanta, GA area. My '65 fastback is out of the paint shop and I am having a difficult time finding a fabricator to work with me on the S550 IRS conversion/modification. I have had mini tubs installed and have purchased my wheels and tires 18x9.5 (265x40/18 tires with 6.6" backspace). The S550 IRS frame will not fit in the '65 and the LCAs are unique to the current model. New LCAs with coil over mounts and a carrier frame/cage  need to be fabricated.  Thanks for any help.


3/03/2024 1:08 pm  #7

Re: S550 Mustang IRS

I found a local fabricator that has been a great help. The IRS support cage, QA-1 coil over shocks, upper and lower control arms are all fabricated and installed. The 8.8" Torsen differential to be installed soon.


4/03/2024 10:50 am  #8

Re: S550 Mustang IRS

I would love to see pix!!

If it isn't broken..... modify it anyway!!!!

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