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Old 01-02-2012, 09:40 PM   #1
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Default Prothane suspension bushings

How are these different than Energy Suspension (other than being considerably cheaper)?

Was thinking about doing urethane bushings over the winter. I remember in past 949 had only Energy Suspension stuff and it was in the order of $250 for a master kit. Now it's Prothane http://949racing.com/prothane-bushings-miata.aspx bushings at $199 for a master kit.

I'm assuming these are virtually identical (same durometer rating) but cheaper. Hell, even the picture is the same (reference - http://forum.miata.net/vb/showthread.php?t=272213)
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Old 01-02-2012, 10:12 PM   #2
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it would seem the duro rating is different? I think the ES was 90 or 95A.

I don't really know tbh, but I have the ES set, minus the sway bar bushings.
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Old 01-02-2012, 10:14 PM   #3
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I have prothane. Seem fine, havent fallen apart
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Old 01-02-2012, 10:32 PM   #4
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I have ES, got em for 220shipped. Don't really know if there is much of a difference or not.
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Old 01-02-2012, 11:04 PM   #5
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Quote:
Originally Posted by Track View Post
it would seem the duro rating is different? I think the ES was 90 or 95A.
nah, they are mostly same 88 durometer (95 for upper front)

http://forum.miata.net/vb/showpost.p...9&postcount=15
Quote:
Originally Posted by emilio700 View Post
Checked durometers and they match Bill's original request and Brian's data.

88 Energy Suspension front lower and all rear control arm
95 Energy Suspension front upper, sway bar and differential mount
80 Super Pro control arm, all
65 Polybush blue- soft
75 Polybush orange- sport
? Powerflex
70 Maruha rubber
55-65 Mazda Comp rubber

Safe to say the ES will be the best peformance option. No idea on ride quality yet as I haven't gotten them in a car yet. Planning a test session in about 10 days at Streets of Willow.

Base kit - Control arms only
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Prothane suspension bushings-es_miata_113105-6_l.jpg  
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Old 10-20-2012, 08:49 AM   #6
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Powerflex:
Yellow 70A
Purple 80A
Black 95A

Any metal is 304 SS CNC machined.
Uses copper-bearing lube if required (supplied) for installation.
Lifetime warranty.
UK factory.

I have no idea which is better (mfr or durometer) for each application, but I do know polyurethanes have huge variations in properties available by altering aspects of manufacturing, so I'd be surprised if they were "all the same", even keeping durometer A equal.

Last edited by Johnny2Bad; 10-20-2012 at 09:00 AM.
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