MM Coil-Overs & CC Plates +17x9 UltraLite = Fitment Issues - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 16 Old 10-09-2005, 10:17 PM Thread Starter
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MM Coil-Overs & CC Plates +17x9 UltraLite = Fitment Issues

Agh! So I just finished up my MM Caster Camber and Coil Over Install. I go to bolt up the wheels (17x9 Ultra-Lites) onto my Baer 5-lug (Modified FOX ) spindles. The tire is rubbing the spring perch and spring. Did I do something wrong? Is this Coil-Over Kit just not compatiable with that wide of a front tire?


--Mike K.
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Current setup: A big hairdryer and supporting mods. Spetter tuned.
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post #2 of 16 Old 10-09-2005, 11:54 PM
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what's the backspacing on the ultralites? this is why maximum specified 6" b.s. on their proprietary konig villains, whereas it used to be 6.25". You might try a wheel spacer. you didn't say what length spring you're using, but that's another possible variable to play with. my experience is with an sn-95, either way it may be pretty tight on your fox without rolled/massaged fenders. try max. motorsports customer service, they're the best.


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post #3 of 16 Old 10-10-2005, 03:42 AM
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As mtbkr3 said, you might need to change out your springs to something that will put the spring perch in a better position. I've run 300# 10" springs (stock suspension geometry) and 425# 8" (I think - they might be 10") (Griggs front end), both with 17x9s on SN95 spindles. No clearance issues with 245/45s and 255/40s. I've even put my rear 275/40s on once before and didn't note any interference.

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post #4 of 16 Old 10-10-2005, 10:21 AM
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I don't know if this matters or not, but I had fitment issues with my ultra-lites with stock control arms.
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post #5 of 16 Old 10-10-2005, 10:27 AM
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Been there, got the T-shirt...

17x9-1/2 275's


Can you say wheel spacers?
-OR-
Went from 10" spring, to 8" spring, and got the interference "above" the tire rub area...

Darius Rudis

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post #6 of 16 Old 10-10-2005, 03:09 PM Thread Starter
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MM' said to oblong the top strut bolt hole and move it away from the tire. I hate doing this to my Koni Yellows. 8'' spring sounds like a good alternative.

--Mike K.
[email protected] W/ old, tired motor.
Current setup: A big hairdryer and supporting mods. Spetter tuned.
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post #7 of 16 Old 10-10-2005, 03:42 PM
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I was able to loosen the strut bolts and pull the spindle outwards, without slotting the holes, to get enough clearance. You may want to try that before you buy springs.
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post #8 of 16 Old 10-10-2005, 05:20 PM Thread Starter
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What kind of struts? MM said a few have oval holes for this reason. Koni Yellows dont

--Mike K.
[email protected] W/ old, tired motor.
Current setup: A big hairdryer and supporting mods. Spetter tuned.
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post #9 of 16 Old 10-10-2005, 05:51 PM
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I am thinking that the spacers may send the wheel a tad bit beyond the fender wells. Mine were just level w/o spacers and had to adjust the camber. This pic was taken with the car in the air, so the wheels didn't exceed the fenders as much when on the ground.

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post #10 of 16 Old 10-10-2005, 06:31 PM
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Mike,

I don't know what offset or backspacing the Ultra-Lites are (I'm assuming that these are Steeda wheels). Using the Baer modified stock spindles is not helping your situation though. An SN95 spindle/hub assembly would place the wheel about 0.25" farther outboard than the Baer spindle does. I would start by installing a 1/4" wheel spacer and see if that is enough to fix the problem. And as Fowler mentioned, loosen the strut bolts and retighten them with the top of the wheel pulled outwards.


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post #11 of 16 Old 10-10-2005, 09:48 PM Thread Starter
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Jack,
I have been working on Jason's plan of opening up the upper strut bolt holes. I think I managed to get them to a good point. What should the spacing be between the spring and tire? Will the springs compress outwards as well as up and down?

--Mike K.
[email protected] W/ old, tired motor.
Current setup: A big hairdryer and supporting mods. Spetter tuned.
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post #12 of 16 Old 10-10-2005, 11:11 PM
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Jack, would crash bolts work to move the strut the way he needs?

BTW, would using crash bolts positively affect the suspension geometry on a Fox body, as in the SAI?
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post #13 of 16 Old 10-10-2005, 11:52 PM
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try switching your top plates from one side to the other... that fixed my problem. (MM plates)

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post #14 of 16 Old 10-11-2005, 04:16 AM
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Mike,

Yes, the spring does increase in diameter as it is compressed. Also as the tire is loaded with cornering force, it gets closer to the spring. I would start with at least 1/8" clearance. Clearance between the wheel and strut/spring/spring perch doesn't matter since the relationship between these parts is fixed when you tighten the strut bolts. So swapping your c/c plates (which you can't do on a Fox Mustang, only an SN95) won't fix the problem.

Unfortunately, this slotting is going to increase your SAI some. This is a mixed bag. It makes your camber curve under bump better, but makes your camber get more positive on the outside wheel with steering lock.

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post #15 of 16 Old 10-11-2005, 07:59 AM
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Slotting enough to clear the wheels may give him more negative camber than he wants, though.
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post #16 of 16 Old 10-11-2005, 12:34 PM Thread Starter
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I really had to open up these struts. I fully loaded the suspension and I still have clearance on the DS. I need to open up the PS a little more.

So, by moving the strut I risk rubbing the top of the tire on the fender?

--Mike K.
[email protected] W/ old, tired motor.
Current setup: A big hairdryer and supporting mods. Spetter tuned.
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