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Discussion Starter #1
So, I attended another autocross event with the bird today. I managed to make a single run and when I went back to get in line for the next run I got out of the car and noticed a pretty big "UH OH". Both front tires seemed noticeably closer to the back side of the fender. A quick peak under the car showed me that the strut rod bushings were pretty much destroyed. Granted, the car is under a lot more stress than a normal stock car but these bushings didn't last 200 miles. I've attached a few pictures of the carnage. I guess I'm off to find OEM bushings and very expensive/fancy stainless steel sleeves.

Final warning: Don't buy thermoplastic strut rod bushings.
 

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Super Moderator
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Wow, that sucks. Yea, when you race like that everything needs to be "at least as good as or better than OEM". Having said that, I think the OEM bushings were by TRW.
 

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Discussion Starter #4
Wow, that sucks. Yea, when you race like that everything needs to be "at least as good as or better than OEM". Having said that, I think the OEM bushings were by TRW.
Yeah, it's obviously like Preston pointed out years ago and many people have reinforced. Anything beyond rubber runs the risk of being squished so hard that all it can do is tear apart. Oh well, TBSCShop sells the stainless steel sleeves, bushings and washers for $180 so that's on it's way. I have scheduled to run a track day on May 1st at Mid Ohio Sports Car Course so I have to get this ironed out before then.
 

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Can you post a link to the TBSCSshop listing for them? Thanks.
 
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Lol :D

Thanks.
 

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Discussion Starter #8
He beat me to it. I bought the entire kit including the bushings and washers. I don't have enough time between now and May 1st to go shopping around.
 

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Resident Gun Guru
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Please educate the ignorant........one end of the strut rod goes through the lower control arm ?
 

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Resident Gun Guru
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Thanks..... I was about to order some cheap poly ones from rock auto for the lca side..... I already have a new set of stock ones from rock auto for the frame side.....my last ones lasted years, I mostly go in a straight line...... Lol
 

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1994 Cougar XR7 DOHC/5-Speed
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Failed under braking clearly, other side looks mint. The stock rubber bushings have a metal cup on the front sandwiched between the k member and rubber(not sure if this piece is impregnated into the bushing or not) which presumably prevents the bushing from squishing outward in diameterunder load, and none of aftermarket ones have that, bet that plays into the demise of these things.
 

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Discussion Starter #17
Failed under braking clearly, other side looks mint. The stock rubber bushings have a metal cup on the front sandwiched between the k member and rubber(not sure if this piece is impregnated into the bushing or not) which presumably prevents the bushing from squishing outward in diameterunder load, and none of aftermarket ones have that, bet that plays into the demise of these things.
I absolutely agree. In fact, I'm willing to bet that the thermoplastic bushings might actually last if you put a washer on the inside of each side to keep them from getting extruded through the frame rail. Nice sleeves would help too but I'm willing to bet the extra washer would allow them to compress instead of getting shredded.

Oh well, I have OEM versions now.
 

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Super Moderator
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Didn't someone on SCCOA replace the strut rod bushings with spherical bearings?

Anyone know how that worked out?

I absolutely agree. In fact, I'm willing to bet that the thermoplastic bushings might actually last if you put a washer on the inside of each side to keep them from getting extruded through the frame rail. Nice sleeves would help too but I'm willing to bet the extra washer would allow them to compress instead of getting shredded.

Oh well, I have OEM versions now.
Seems like if you made an assembly to compress a disk of rubber, constrained as you said, we could adjust the 'feel' by using different durometer rubber or poly disks, on each side of the frame rail.

If the assemblies were mounted on opposing spherical bearings, it would still have the damping, but no distortion of the damper.

Anyone follow that?

:)
 

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1994 Cougar XR7 DOHC/5-Speed
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The main marks against spherical bearings is the necessary fab/modification of thestrut rods and frame mounts, which = and I only am willing to spend $$ on certain things :tongue: and the geometry is slightly altered. The strut rod and LCA as assembled are a virtual A arm with pivot points parallel to the frame, with spherical bearings the pivots would end up diagonal.
 

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The main marks against spherical bearings is the necessary fab/modification of thestrut rods and frame mounts, which = and I only am willing to spend $$ on certain things :tongue: and the geometry is slightly altered. The strut rod and LCA as assembled are a virtual A arm with pivot points parallel to the frame, with spherical bearings the pivots would end up diagonal.
I'm not seeing this; wouldn't the ... Oh, I get it. You'd need different control arms, and the geometry would be whack.

Force vectors can be tricky. :)
 
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