Mustang frames twisting - Muscular Mustangs
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post #1 of 5 Old 03-09-2005, 01:47 PM
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Mustang frames twisting

Have any of you heard about the Frames on mustangs twisting? I believe it was due to extra HP put into the car. I have a buddy who's had 3 Mustangs (86,90, 93) all LX 5.0s. He said the Mustangs were built poorly and his twisted the frame on his 93. I was thinking about getting a 93 Cobra and he said he thinks it's a nice car, but even with Subframe connectors the frame could still twist because of the unibody being built so poorly. Does anyone have any info on this? Thanx in advance.
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post #2 of 5 Old 03-09-2005, 05:47 PM
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Just about any unibody frame will twist if enough power is put through it.
Subframe connectors and a strut tower brace should help alot in the flex department. KB sells subframe connectors that connect just about everything in the floor pan.
post #3 of 5 Old 03-09-2005, 06:08 PM
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How much power is "enough" to twist the frame? If I get a 93 Cobra, I'm definitely not going to keep that 235HP engine in it. I'll be upgrading to a 400+ HP more than likely. Can the frame handle that? At what point is too much for the frame?
post #4 of 5 Old 03-10-2005, 06:12 AM
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For the most part the problem isn't with the frame because technically there is no "frame". The problem is that the twisting will distort the body panels over time. In all reality it's not a problem, and will be even less of a problem if you go with a good set of weld in subframe connectors, and a strut brace wont hurt either.
I think the subframes Jim is talking about are the Kenny Brown "Extreme Matrix" subframe connectors which are basically comprised of normal subframe connectors, jacking rails, and a brace/connector that connect the two together. Here's what they look like

Image from 5.0 Mustang Magazine's Website

Don't get overly worried about body flex, just install subframe connectors and be done with it. There are a ton of guys out there running much more than 400hp without any problems. Also this is not a "Mustang" problem, and is actually a unibody problem. Any car that is made on a unibody (read: all modern cars) chassis will have body/frame flex with excess horsepower.

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post #5 of 5 Old 08-23-2005, 05:29 PM
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Subframe Connectors

Even if you don`t add power, sub frames will increase handeling 10 fold.
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