Lowering Springs 1989 Mustang GT - Ford Mustang Forum
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post #1 of 16 (permalink) Old 04-14-2012 Thread Starter
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Lowering Springs 1989 Mustang GT

I want to lower my Mustang, i have 17x9 Cobra R rims with 275/40/R17 in the back and 235/45/R17 in the front. the springs i want are the 2" Drop springs from SVE, those red ones. and my question is, will i rub with a 2" drop on 17" rims with that much rubber in the back? Will i have to roll the lips in the fender wells? if i do then what is the best and safest way to do it. i really don't want to damage my car from the inside-out making dimples.
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post #2 of 16 (permalink) Old 04-14-2012
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Those SVE springs sag lower than 2".... I had them for a month and returned them. They rubbed on my 92 with 255/40 17 in the back. Now I have sportlines with new isolators and they never rub.
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post #3 of 16 (permalink) Old 04-14-2012
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I didn't see where you mentioned anything about NEW C/C plates when you lower your ride 2".

You're gonna need um
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post #4 of 16 (permalink) Old 04-15-2012
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Quote:
Originally Posted by ALMOST STK View Post
I didn't see where you mentioned anything about NEW C/C plates when you lower your ride 2".

You're gonna need um
Yes.... That's true even with sportlines.
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post #5 of 16 (permalink) Old 04-16-2012
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I can set you up with a really good price on the UPR cc-plates... (10% discount off of the $149 price)

79-89 Mustang Billet Caster Camber Plates

But yeah, a two inch drop will munch the crap out of 275/40-17s without rolling or cutting the lips and pounding out the inner wheelwells.
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post #6 of 16 (permalink) Old 04-17-2012 Thread Starter
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im gonna need new cc plates? what will those do for me exactly :/ and im looking into the whole eibach pro kit. looks pretty good.
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post #7 of 16 (permalink) Old 04-17-2012
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Thats interesting Ive never heard of these cc plates.. Ilowwered my stang a few months ago and its been good. What are these cc plates suppose to do? I dont run 17s I run 15s I can see how 17s would rub.
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post #8 of 16 (permalink) Old 04-17-2012
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Yeah CC plates are necessary and will help you align the car correctly.

With that drop you will need a BFH for the inner fender wells and the lips will need to be rolled fo sho.

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post #9 of 16 (permalink) Old 04-18-2012
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Quote:
Originally Posted by 5.0brandon View Post
im gonna need new cc plates? what will those do for me exactly :/ and im looking into the whole eibach pro kit. looks pretty good.
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Originally Posted by Kevin86nh View Post
Thats interesting Ive never heard of these cc plates.. Ilowwered my stang a few months ago and its been good. What are these cc plates suppose to do? I dont run 17s I run 15s I can see how 17s would rub.
Yep, a 2" drop on a Fox will give you about 3° of negative camber in the front. The factory spec is less than 1°. The extra negative camber wears the insides of the tires.

CC-plates allow you to bring the alignment back to factory specs. Also, UPR cc-plates in particular improve handling because we use a spherical bushing where the strut shaft goes through the plate, rather than the big sloppy rubber bushings the factory plates use. Our cc-plates make the steering more accurate, precise.


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Thanks I will have to buy some. When I get new tires I dont want to wear them down.
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Thanks I will have to buy some. When I get new tires I dont want to wear them down.
No problem. Let me know when you're ready to order some and I'll PM you a discount code. I think you'll find that ours are less expensive than most of our competitors, but ours are Made in America and carry a Lifetime Guarantee.


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post #12 of 16 (permalink) Old 04-19-2012 Thread Starter
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thanks for the advice. i wouldn't get them if it weren't for you helping me out. i think im going to go with the eibach kit to be more safe and new CC plates. and i might as well get new isolators, it'll probably help out. my mustang is all stock suspension.
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While you are down there, it would be a good time to check the bushings. This is one of the best ways to tighten up an old horse.

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1989 Sonic Blue Mustang LX Coupe, 349 ci,
392 rwhp 424 rwtq....Mustang Dyno
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Quote:
Originally Posted by 5.0brandon View Post
thanks for the advice. i wouldn't get them if it weren't for you helping me out. i think im going to go with the eibach kit to be more safe and new CC plates. and i might as well get new isolators, it'll probably help out. my mustang is all stock suspension.
I've owned a few Foxes / New Edge 'Stangs ('82, '86, and '01) and have some recommendations:

1. Before you do anything else to the car, get a good set of subframe connectors. Make sure they have the crossbar that ties in to the seat mounting bolts. Maximum Motorsports makes a great set. A muffler shop can weld them in for you for less than $100.

2. Eibach Springs and new polyurethane isolators are a very good choice. I don't recommend lowering a Fox more than 1.5" - below that you start to get some annoying bump steer and tramlining effects, and your exhaust system will take a beating from speed bumps.

3. If you go with stiffer springs, I highly recommend that you upgrade the struts/shocks.

4. CC plates are a must. All of my FoxStangs tended to chew up the inside edges of the front tires, even at stock ride height. CC plates eliminated the problem and saved me $$$ in premature tire replacement. And the MM plates I used had a spherical bearing instead of a rubber bushing, which firmed up the steering feel.

5. Consider using polyurethane steering rack bushings. They did wonders for steering feel.

Good Luck!

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post #15 of 16 (permalink) Old 04-21-2012 Thread Starter
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okay, looks like im going to get sub frame connectors first then get the eibach kit with cc plates and new isolators. and while im down there i should replace bushings. so i got a lot on my plate now haha. gotta save up for this. it'll cost a lot of money, i already know.
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