Front Brakes / Hubs - first mistake and I haven't lifted a spanner?

[daxtojeiro]

Hi all,
sorry if this is a stupid question, but as I bought a 2015 (S550) onwards donor rear end (hubs, calipers and diff) for the IRS setup, I figured I would also get the front hubs and brakes off the same car, especially as I got a reasonable deal on all the parts.

So I was quite please with myself, looking forwards to starting refurbishing the bits.

Then I started thinking, does the front end also come from a 2015 mustang, or should I have bought it from an older version?
Looking at the manual it seems like I have bought the wrong bits for the front! :(

Is any of it useable or is it totally different? I don't have the Brembo setup, its the 2.3 EcoBoost version, so looks like this:

140396
140397

thanks
Phil

[Jeff Kleiner]

That is not compatible. What spindles are you using? The Factory Five ones are designed to use 1999-2004 Mustang hubs, rotors and calipers or the upgraded Wilwoods

Jeff

[mike223]

The Factory Five ones are designed to use 1999-2004 Mustang hubs, rotors and calipers or the upgraded Wilwoods.

I think that should be 1994-2004?

[Jeff Kleiner]

I think that should be 1994-2004?

Nope. 1999-04 use the double piston PBR calipers which are not interchangeable with the 1994-1998 single piston ones. The hubs however are the same.

Jeff

[daxtojeiro]

Ohhh dear, thanks for that, never mind, every day is a school day :)

I haven't paid for it all as yet, so may still be able to get the rear end at a good price without the front calipers and hubs.

So to be sure, I need front hubs and discs from a 1987 - 93 or a 94-98 , as the manual seems to say that the donor car is a 87-93

thanks
Phil

[jwhit]

Ohhh dear, thanks for that, never mind, every day is a school day :)

I haven't paid for it all as yet, so may still be able to get the rear end at a good price without the front calipers and hubs.

So to be sure, I need front hubs and discs from a 1987 - 93 or a 94-98 , as the manual seems to say that the donor car is a 87-93

thanks
Phil

make sure to use the ffr spindles

[mike223]

Nope. 1999-04 use the double piston PBR calipers which are not interchangeable with the 1994-1998 single piston ones. The hubs however are the same.

Jeff

I converted from 1995 spindles to the two piece FFR spindles several years ago - I have 1995 hubs, rotors + single piston calipers installed on FFR spindles - they work fine - are we talking about the same thing?



Ohhh dear, thanks for that, never mind, every day is a school day :)

I haven't paid for it all as yet, so may still be able to get the rear end at a good price without the front calipers and hubs.

So to be sure, I need front hubs and discs from a 1987 - 93 or a 94-98 , as the manual seems to say that the donor car is a 87-93

thanks
Phil

87-93 is a four lug hub with removable bearings and I don't think any of that works with the FFR spindles (calipers , rotors, hubs - none of it).

Based on my experience any (+ all) of the 94-98 stuff will bolt up to the FFR spindles (if FFR spindles are what you're using).


If you're using Mustang spindles - 94-98 will work, with 94-95 being preferred because the steering arm geometry is better.


To my understanding all the geometry is considerably improved with the FFR two piece spindles (bump steer + steering angle inclination).

[Jeff Kleiner]

I strongly encourage you to use the FFR proprietary spindles. Unlike the roadster which incorporates different mounting points for the upper control arms depending on whether donor or FFR spindles are being used the Coupe chassis does not and was designed around the Factory Five spindles. Although in theory the Mustang spindles can be used you wind up with some wonky geometry. Take a look at what happens to the upper control arms in that scenario:

https://thefactoryfiveforum.com/attachment.php?attachmentid=140411&d=1594730510

With the upper and lower arms being so far from parallel it's going to cause some extreme camber changes as the wheel moves up and down.

My not so humble opinion...you spent the money for IRS; don't cheap out and shortcut the front suspension ;)

Cheers,
Jeff

140411

[daxtojeiro]

Hi,
well good news is I have managed to sort a refund on the parts I don't need :)

Do I assume that the kit comes with the front hubs?
I have ordered the #12066 option for the front end, which I assume is the right one, as the #13242 says its for the moser rear end and the #14507 is for use only with the #13242
I don't see any options for the front hubs, so I assumed it wasn't included?

As you can tell I'm very confused :(

thanks
Phil

[mike223]

The #12066 option is just the lower control arms.

I did not realize the coupe frame was not made with the same front suspension mounts as the roadster.


So (I believe) you additionally need the #14850 - Mk4 Two-Piece Spindle Set.

And hubs, rotors and calipers for 1994 - 2004 Mustang.

1999 - 2004 if you want the double piston PBR calipers.

[daxtojeiro]

Hi Mike
thanks for the info.
Hopefully I can simply add this to the order. I will give FFR an email and see what they suggest, as I have no idea :)
Phil

[daxtojeiro]

Just incase anyone else comes across this issue, I have had a reply from FFR and the hubs / spindles are included in the "complete kit" so all I need are the calipers and discs :)

Happy days! I am good at making things complicated :)

thanks for the help
Phil

[Papa]

Just incase anyone else comes across this issue, I have had a reply from FFR and the hubs / spindles are included in the "complete kit" so all I need are the calipers and discs :)

Happy days! I am good at making things complicated :)

thanks for the help
Phil

Funny, I was just about to ask if you ordered the full kit. Good to hear you were able to avoid paying for parts you don't need. You'll need that money for all the other parts we convince you to buy!

[michael everson]

If you ordered the complete kit, it comes with front brakes as well.
In fact it comes with everything except the following
Rear suspension and brakes
engine
transmission
battery

Mike

[Jeff Kleiner]

I was about to make the same reply as Mike. Assuming a "Complete kit" everything for the front suspension and brakes is included. That being the case you do not need calipers and discs. When you first mentioned purchasing the tubular lower control arms #12066 as an option it lead me (and perhaps others) to believe that you purchased a "Base kit" since they are already included with the Complete package. Just to confirm, you did indeed purchase a Complete Kit and not a Base kit with options, correct?

Jeff

[daxtojeiro]

Hi,
yeah it is the "complete kit" but there are a lot of options to add before it becomes everything except the engine, etc. - wheels, tyres, exhausts, side windows, etc, so I thought I had missed something.

I then got a bit confused and assumed that I would need the front and the rear suspension parts. All sorted now. :)
Hopefully I will pick up the rear end parts tomorrow,

thanks for all your help!

Phil