Which MM LCA's do I need, XD or HD? - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 8 Old 02-20-2009, 12:37 AM Thread Starter
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Which MM LCA's do I need, XD or HD?

I'm was about to order the Heavy Duty MMRLCA1's for my 90' LX. However, I am now debating on the XD's (MMRLCA30) instead.

My car is putting down just around 500 rwhp and is driven occassionaly on the weekends. I plan on slowly aquiring the remaining MM parts from the "grip box" list (TA, panhard, coil overs, K-member etc etc....).

My question is do I need the XD's? The car will obviously be built with an emphasis on handling. It will be taken to the 1320 maybe once or twice a year just to see what it will run. I don't street race, so that's not an issue either.

The XD's cost more and I would assume ride quality will be worse than HD's. I'm just not sure which I really need.


90' LX, Dart 347/YSi 843 rwhp
Now with a 9.5:1 Coyote Aluminator and t56 Magnum looking for a little boost....

13' Race Red Boss 302 #609, AMR wheels/ Eibach springs, Airaid CF CAI, Accufab TB, Flowmaster Super10's
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post #2 of 8 Old 02-20-2009, 05:50 AM
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With that kind of HP, I would lean toward the XD's. I went through a set of bushings in the HD's with "every now and then drag strip" appearance's.

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post #3 of 8 Old 02-20-2009, 04:50 PM
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I would definitely recommend the XD's. When I called them and told them the abuse my car went through with only 300 whp (at the time) they recommended the XD's as well.

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post #4 of 8 Old 02-21-2009, 12:59 PM
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my car is making just over 500hp to the wheels and i went with the heavy duty arms primarily because my car is nothing more than a street machine, no track usage at all.

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post #5 of 8 Old 02-21-2009, 03:39 PM Thread Starter
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Thanks for the responses. I went ahead and ordered the XD versions yesterday. I feel more comfortable having the stronger arms back there.

On a side note, how much improvement did you notice when switching from the stock arms to aftermarket units? Was it mostly straight line traction or is there a noticeable difference in handling as well?

90' LX, Dart 347/YSi 843 rwhp
Now with a 9.5:1 Coyote Aluminator and t56 Magnum looking for a little boost....

13' Race Red Boss 302 #609, AMR wheels/ Eibach springs, Airaid CF CAI, Accufab TB, Flowmaster Super10's
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post #6 of 8 Old 02-21-2009, 04:11 PM
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My major difference was my corner exits speeds went up because I was able to put the power down and not have the rear tire(s) bounce around like a basketball spiraling in a hoop.
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post #7 of 8 Old 02-21-2009, 11:17 PM Thread Starter
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Quote:
Originally Posted by 2k2GT View Post
My major difference was my corner exits speeds went up because I was able to put the power down and not have the rear tire(s) bounce around like a basketball spiraling in a hoop.
Nice.... I'm hoping to see a good difference in the way the car handles. I've got the 145k mile stock arms on there now. Uppers are just-replaced FMS HD's. Can't wait to do the panhard and T/A...

I also noticed my tires are rubbing on the fenderwells, much farther forward than they should be. This tells me that the stock control arms/bushings are giving way too much and allowing the rear end to sway fore and aft.

90' LX, Dart 347/YSi 843 rwhp
Now with a 9.5:1 Coyote Aluminator and t56 Magnum looking for a little boost....

13' Race Red Boss 302 #609, AMR wheels/ Eibach springs, Airaid CF CAI, Accufab TB, Flowmaster Super10's
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post #8 of 8 Old 02-22-2009, 01:52 PM
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I have had these arms for three years and they have held up admirably to anything I've thrown at them. Great product.

Trafford, Pa
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