IRS mods

[Black93Fox]

So been browsing parts, researching threads so on so on so many options delrin, urethane, irs toe end links, maximum, full tilt choices and directions are endless. Anyways what have you guys done how did you feel the improvement was did it reduce wheel hop, ride better or worse? Needing some opinions on which parts to get.

Little info on the car

2.3 whipple
All the usual engine bolt on's
Have mm full length sfc waiting to get put on
Lowering springs
17x10.5 planning to go with either proxes tq or r888
Car made 560 at the wheels but planning to go for 600.

 

[bubblehead93]

make sure the car is sitting on the suspension when you install the FLSFCs... to your original question, had all the usual wheel hop issues, bought the full MM IRS setup for the rear.. all of the subframe and differential bushings, irs adjustable tie rod kit, adjustable sway bar end links, the correct size front sub frame bolt and the low profile rear one, etc, etc... still have not done the rear UCA and LCA bushings... in any event, I have no wheel hop after all that... the car holds its own against these new Focus ST hot hatches which seem to be all the rage in auto-x these days... and then throw 28" slicks on it for Friday/Saturday grudge night racing... as far as ride quality, depends what you want, I want to push the car to the limit of the tires, so with h&r race springs and MM race dampers on each corner, it is a bit harsh, but it drives like its on rails... swap the rears for some Vikings, time to go straight and fast...

 

[Black93Fox]

make sure the car is sitting on the suspension when you install the FLSFCs... to your original question, had all the usual wheel hop issues, bought the full MM IRS setup for the rear.. all of the subframe and differential bushings, irs adjustable tie rod kit, adjustable sway bar end links, the correct size front sub frame bolt and the low profile rear one, etc, etc... still have not done the rear UCA and LCA bushings... in any event, I have no wheel hop after all that... the car holds its own against these new Focus ST hot hatches which seem to be all the rage in auto-x these days... and then throw 28" slicks on it for Friday/Saturday grudge night racing... as far as ride quality, depends what you want, I want to push the car to the limit of the tires, so with h&r race springs and MM race dampers on each corner, it is a bit harsh, but it drives like its on rails... swap the rears for some Vikings, time to go straight and fast...

That's exactly why I haven't put them in yet waiting for access to a drive on lift know a lot of people just throw the car on jack stands and have at it. The MM kit is one I was looking at then also looked at the FTBR one. Mainly looking to get the car to stick and get rid of the hop.

 

[bubblehead93]

FTBR is quality as well... MM was what was available for me at the time, or at least what I knew about, doing it today, might have gone either or... the Stifflers kit is pretty nice of your also looking to strengthen the chassis... jacking rails, x brace, and driveshaft loop all ties into your FLSFCs...

 

[Blkkbgt]

I have damn near every piece FTBR offers for the irs on my car and love it! The car actually goes down the road smoother. If you buy the bushing kit (this should be the first mod imop) pull and disassemble your irs before the kit shows up and get everything prepped. This way when the kit comes you can put it all back together and enjoy it right away and identify any potential issues.

 

[SlowSVT]

Get jacking rails (Hans Racecraft, Stiffers, Global West) they are much more substantial then simple rectangular SFC if you really want to stiffen the floor pan.

This should be the 1st mod to the car

 

[MG0h3]

Went FTBR.

handling changes are unbelievable.

I still have some wheel hop on my NT05s. Bruce recommended I reduce tire pressure and try again. Unfortunately I left town before getting around to it.

 

[Black93Fox]

Those with stifflers how was the fitment when you went to install them?

 

[Black93Fox]

I have damn near every piece FTBR offers for the irs on my car and love it! The car actually goes down the road smoother. If you buy the bushing kit (this should be the first mod imop) pull and disassemble your irs before the kit shows up and get everything prepped. This way when the kit comes you can put it all back together and enjoy it right away and identify any potential issues.

How was the install did you do they're tool rental / return?

 

[Blkkbgt]

How was the install did you do they're tool rental / return?

Yes but I chose to keep the tools. One of them works really well for the front lower control arm bushings btw.

 

[Black93Fox]

Yes but I chose to keep the tools. One of them works really well for the front lower control arm bushings btw.

Ah good to know!

 

[Blkkbgt]

Also the install went just fine. The hardest part is drilling the upper a arm grease fitting holes. Make sure you have a drill press. The large subframe bushings are not as hard as people make them out to be. You don't have to drill them, simply heat them up with a heat gun to where they are kind of smoking and use the tools to remove them. Cake.