4 link to IRS

[Just 1 More]

Can you convert a 4 link set up to the IRS? Well, I know you could but what I'm asking is how much modification is required or is it a bolt in swap?

[michael everson]

Not at all possible. The frame is very different behind the passenger compartment

Mike

[Just 1 More]

Not at all possible. The frame is very different behind the passenger compartment

Mike

Thank you

[GoDadGo]

Have you thought about upgrading to the 3-Link with panhard bar?

[RoadRacer]

Have you thought about upgrading to the 3-Link with panhard bar?

This. The 3-link is generally considered a big upgrade from the 4-link, geometry wise.

[Just 1 More]

Have you thought about upgrading to the 3-Link with panhard bar?

Can this be done with the chassis already set up with the 4 link?

[Papa]

Can this be done with the chassis already set up with the 4 link?

The current non-IRS chassis supports either 3-link or 4-link. You'll need the three-link parts from FFR. You'll need to confirm if your specific chassis supports 3-link.

[Just 1 More]

Just watched the suspension video and it does say the 4 link is upgradeable to the 3 link

[Papa]

I found this link that indicates compatibility with MK1, MK2, MK3 cars as well as the MK4.

https://www.factoryfiveparts.com/131...ofit-assembly/

[GoDadGo]

Just watched the suspension video and it does say the 4 link is upgradeable to the 3 link

I know the MK-4 Chassis has the provisions for the upgrade.
I think the MK-3.1 also has those same frame provisions, but I'm NOT an expert.

[EZ$]

I'm not absolutely certain, but I think CraigS did this some years back. From what I remember of the thread, it was not for the faint hearted. Hopefully he'll see this thread and respond.

[EZ$]

OK, went back and double checked, Craig did do the swap to the 2015 IRS. https://thefactoryfiveforum.com/show...upgrade-report

Apparently, it went well, and he's happy with it.

[progmgr1]

Back in the olden days (before FFR offered the 2015 IRS option) some builders incorporated an IRS from other cars. The one I remember in particular adapted a complete rear suspension package from a BMW M3. The advantage was that it was self-contained and mounted on a subframe that had 4 floating mounting points. This was an "easy" job, but only because the builder had mad fabrication skills and patience.

Keith HR #894