What parts to finish my cobra rack install? - Ford Mustang Forums : Corral.net Mustang Forum
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post #1 of 14 Old 03-05-2018, 08:42 PM Thread Starter
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What parts to finish my cobra rack install?

I'm replacing my leaking rack & pinion on my '91 fox, upgrading to the Cobra rack...already ordered the 22-2000 Cardone from Advance Auto & need to swap another Maximum Motorsports steering shaft (MMST-13)...I will be selling my MMST-11 shaft for a Fox rack...only 1500 miles on it.

1) What brand(s) should I be looking at for a new/rebuilt reliable pump & reservoir as well as hoses? I want it all fresh.

2) Do I swap the old tie-rod ends over to the new rack or does it make sense to buy new/better parts there?

3) Am I missing anything else?


1991 LX Convertible

GT40 Heads Ported/Milled, Crane 1.7's, TMoss Intake, Rawls Cam, 70mm TB & 76mm maf, Holly 30# & Moates QH, Wide Ratio AOD/SPT-r VB & 3.73's, JBA shorty, O/R X-pipe, DynoMax VT, MaxMo SFC's/Strut/K Braces/CC Plates/RLCA's/PHB, Bilstein HD,& Eibach Pro-Kit 270rwhp/307tq
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post #2 of 14 Old 03-06-2018, 06:51 AM
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'89 GT convertible, N/A 357W, MM front susp w/425# coil-overs and Koni D/As, MM TA/PB rear setup (Koni Yellows, 390-430# springs), Stoptech 332mm / 12" Baers, MM 6 point rollbar, Maier 1.5" flared fenders & quarters, 18x9.5" front/18x10.5" rear Enkei RPF-1s (street), 18x10" CCW C-10s (track), etc...
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post #3 of 14 Old 03-07-2018, 06:23 PM Thread Starter
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So I was going to buy new Moog inner/outer Fox tie-rod parts for the new Cobra rack (swapping the metric for the SAE)...But if the shorter Taurus outer accomplishes the exact same results then that's a win-win. Is that a guaran-damn-tee guys?

1991 LX Convertible

GT40 Heads Ported/Milled, Crane 1.7's, TMoss Intake, Rawls Cam, 70mm TB & 76mm maf, Holly 30# & Moates QH, Wide Ratio AOD/SPT-r VB & 3.73's, JBA shorty, O/R X-pipe, DynoMax VT, MaxMo SFC's/Strut/K Braces/CC Plates/RLCA's/PHB, Bilstein HD,& Eibach Pro-Kit 270rwhp/307tq
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post #4 of 14 Old 06-28-2018, 04:12 PM
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Quote:
Originally Posted by FOXVERT91 View Post
So I was going to buy new Moog inner/outer Fox tie-rod parts for the new Cobra rack (swapping the metric for the SAE)...But if the shorter Taurus outer accomplishes the exact same results then that's a win-win. Is that a guaran-damn-tee guys?
Just get MOOG fox outter tie rod ends, boom done. I did that and went with MM's solid shaft & steering feels great.
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post #5 of 14 Old 06-29-2018, 08:33 AM
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Quote:
Originally Posted by FOXVERT91 View Post
So I was going to buy new Moog inner/outer Fox tie-rod parts for the new Cobra rack (swapping the metric for the SAE)...But if the shorter Taurus outer accomplishes the exact same results then that's a win-win. Is that a guaran-damn-tee guys?
Yes. You're call as to which route you want to go. 93 Taurus outers, or swap to fox inner and outer tie rod ends. In my case, i went with Moog fox-specific parts. I knew one day i'd be probably installing an MM bumpsteer kit, and didn't want to start mixing and matching generations there. Once you do that, it's pretty much a direct swap for the fox rack using the MM steering shaft.

I replaced all the PS hoses and lines, but i left the original 30 year old pump. Sadly, i have more faith in the old pump than a newer reman. What's interesting is doing a new fill with clean Type F, and taking my time to purge all the air out has resulted in the pump being the quietest it's ever been. I can barely hear it these days.

Very good modification and ditching the sloppy fox rack and steering shaft has been one of my favorite mod's i've done on the car.

Mike
--1988 Mustang LX 5.0--
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post #6 of 14 Old 06-29-2018, 08:39 AM
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I have a brand new power steering line for you, found out real quick my rack wasnt a 03/04 cobra like the ebay seller said, but a regular degular SN95 rack.

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post #7 of 14 Old 06-29-2018, 12:26 PM
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Fox outer tie rod ends will NOT screw onto an SN95 steering rack.

Never purchase a rack without a photo of the SPR code. That is the only way to know what application the rack came from.

Jack Hidley
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post #8 of 14 Old 06-29-2018, 11:31 PM Thread Starter
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Sorry been away a while...wrapped that project up a few months ago. Got the good SPR-ZM rack from Advance Auto for a good price, Maximum Motorsports Hybrid shaft, & fox inner/outers and it’s spectacular...Advance took the Fox rack back as a core. I even string aligned it temporarily to get to the alignment shop and they said it was nut-on to my requested specs...no charge.
Also I had ordered new ball joints from Maximum Motorsports but never installed them...need to return or sell them in classified section if anyone needs a pair. Ended up reinstalling the old pump cuz the reman was noisy...love the steering feel for sure!

1991 LX Convertible

GT40 Heads Ported/Milled, Crane 1.7's, TMoss Intake, Rawls Cam, 70mm TB & 76mm maf, Holly 30# & Moates QH, Wide Ratio AOD/SPT-r VB & 3.73's, JBA shorty, O/R X-pipe, DynoMax VT, MaxMo SFC's/Strut/K Braces/CC Plates/RLCA's/PHB, Bilstein HD,& Eibach Pro-Kit 270rwhp/307tq
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post #9 of 14 Old 07-02-2018, 08:48 PM
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To answer all of these questions, we made a web page to deal with all of them.

SN95 Steering Rack Upgrade for Fox Mustangs
DSSR, FOXVERT91 and thadude like this.

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Maximum Motorsports Tech Support
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post #10 of 14 Old 07-09-2018, 11:59 AM
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I just installed the MM Hybrid Steering Shaft Assembly for my Cobra rack a couple days ago. I was running my own make-shift shaft and decided to go with a purpose built unit.

The installation when fairly smooth, except the MM shaft seems to be a bit too long. I had to loosen the rack bushing and pull the rack forward to get it in. It's fully collapsed in it's installed state, which to me defeats the purpose of have a telescoping length. My car has a MM K-member and MM rack bushings so the rack position isn't out of the ordinary. Just an FYI...


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post #11 of 14 Old 07-09-2018, 01:22 PM
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Tom,

Your steering column tube is pulled out of the firewall more than it normally should be. It can be tapped back in with a hammer. That is why the MM steering shaft appears to be too long.

Jack Hidley
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post #12 of 14 Old 07-09-2018, 02:15 PM
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Thanks for the info!

1989 Mustang GT
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post #13 of 14 Old 07-10-2018, 08:20 AM
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FOXVERT91, sorry about using your thread for a few questions, but they're relevant to the rack install.

Jack, I adjusted the firewall tube and the shaft install looks better. Here's another question... since I did the old re-clock the rack input shaft 90 degree trick (required before the MM Hybrid shaft was available) do you think the new shaft u-joint orientation is going to cause me any issues? Visually looking at it, I don't think so but figured I'd ask.

1989 Mustang GT
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post #14 of 14 Old 07-10-2018, 11:56 AM
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Since the operating angles of the u-joints are not even close to the same as each other, their is a fair amount of speed variation. This makes the steering less linear.

This is mostly absorbed by the compliances in the various parts in the steering system. When you run solid rack mounts, FCA bushings and tires with a stiffer sidewall, it becomes more obvious.

I would not spend the money to change the steering shaft just to make the speed variations symmetric. Unless your car is bumpsteered perfectly for example, it just won't be worth the added precision.
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