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Bushes
Jul 23, 2018 8:39:51 GMT
Post by noobie on Jul 23, 2018 8:39:51 GMT
"Potential" issues with the Bofi racing bushes:
Hard to tell from the pic, but there does not appear to be a chamfer on the wider ends of the bushings. These ride against the subframe and are responsible lateral positioning of the bushing and account for approx 50% of total friction (that number increases if the subframe is rusty at the locations that the bushing rides against -> 90% of UK cars).
Nano particles reduce friction by 20%. Sounds like something significant, but I measured a 200% increase in friction on Energy Suspension PU bushes over 2 years. A 20% reduction is not nearly enough to compensate the wicking effect that PU has on lubricants. Practically that might mean you'll still need to re-lube them regularly.
I'd say that SP or ILM are still the proven solutions. Would LOVE to see someone who is not a vendor test the suspension compliance on the SP bushes after a year or two. All arms should drop down easily under their own weight. Maybe someone will do it sometime when switching suspension setups? |
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Post by NurseHolliday on Jul 25, 2018 9:23:45 GMT
IMO, the majority of people who rave about polybushes upgrade from 20 year old worn rubber and then say it's like night and day, but in my personal experience, replacing worn rubber with brand new rubber is also like night and day. On a dual duty road and track car, decent rubber is more than good, it's fantastic, leave the poly for the race cars, by the time the rubber wears out again you'll have gotten rid of the car.
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Bushes
Jul 25, 2018 9:32:53 GMT
Post by Rickster on Jul 25, 2018 9:32:53 GMT
"Potential" issues with the Bofi racing bushes:
Hard to tell from the pic, but there does not appear to be a chamfer on the wider ends of the bushings. These ride against the subframe and are responsible lateral positioning of the bushing and account for approx 50% of total friction (that number increases if the subframe is rusty at the locations that the bushing rides against -> 90% of UK cars).
Nano particles reduce friction by 20%. Sounds like something significant, but I measured a 200% increase in friction on Energy Suspension PU bushes over 2 years. A 20% reduction is not nearly enough to compensate the wicking effect that PU has on lubricants. Practically that might mean you'll still need to re-lube them regularly.
I'd say that SP or ILM are still the proven solutions. Would LOVE to see someone who is not a vendor test the suspension compliance on the SP bushes after a year or two. All arms should drop down easily under their own weight. Maybe someone will do it sometime when switching suspension setups?
Mine do this but only because I lubed them generously when fitting and regularly silicon lube spray them (plus my car is garaged and not a daily) If you dont do that the cheap ones can seize up to the extent that the wishbone fractures - i think there was a thread with pics somewhere on a lesser Forum Not good  |
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Post by noobie on Jul 25, 2018 12:26:10 GMT
Wishbones don't care about the price of PU bushings. If they seize up the wishbone is in danger.
That SuperPro bushes happen to be expensive doesn't mean that all other expensive sets are ok, mine certainly were nowhere near the price of Ebay stuff but seized up just the same).
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Post by myothercarsa2cv on Jul 30, 2018 6:51:40 GMT
IMO, the majority of people who rave about polybushes upgrade from 20 year old worn rubber and then say it's like night and day, but in my personal experience, replacing worn rubber with brand new rubber is also like night and day. On a dual duty road and track car, decent rubber is more than good, it's fantastic, leave the poly for the race cars, by the time the rubber wears out again you'll have gotten rid of the car. +1. I’m a big fan of OE bushes, one less thing to worry about. |
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le sigh