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poly bronze bearings/bushings
#1

OK: do you guys have a list of have a list from personal experience of what fits and what works in the 968 in regards to Elephant racing (or other sources) poly bronze bearings and bushings front and rear? Many sites sell these but I want to know from someone who actually put them in if they are worth it AND what if any problems were encountered. Thanks
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#2

i have them all - it has been in there now for about 2 years



i love the front stuff - MUCH better feel and response, though it does translate to a less compliant feel - things that were absorbed by all the rubber now i am aware of - this is a good thing for a sportscar, and i really like it, but it may get annoying for some people who are looking for a softer ride



just a note: i was unable to run spherical strut bearings as without any rubber left anywhere at that point, it was just too jarring for street - once i put the oem strut bearings back in, all was good again - it seems the suspension has to have rubber somewhere



as for the rear stuff, i have all of that too - i had delrin bushings in the torque tube, and hated them - way too noisy - the polybronze has been much better - i still have a small squeak on one side, but i tend to think that it is not that bushing, but rather my upper shock mount - i'll be addressing that shortly - the only gripe i had about the polybronze was the hole you have to put in for the grease fitting - the fitting it comes with is too small and it's too easy to strip the threads - i had to change that out to a larger one



pete has installed a lot of these too - i would ring him up for more input
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94 Midnight Metallic Blue Cab Porsche 968 w/deviating cashmere/black interior and WAY too many mods to list - thanks to eric for creating www.968forums.com



"It isn't nearly as expensive to do it right as it is to do it wrong."
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#3

Thanks Flash, exactly what I was looking for. After readign the install pages from Elephant, I also did not particularily like the grease fitting set-up/hole drilling.



So you have both of the front lower control arm bushings?
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#4

yes - front bushings, and castor blocks - also have the inner rear bushings and the torque tube bushings - got 'em all
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94 Midnight Metallic Blue Cab Porsche 968 w/deviating cashmere/black interior and WAY too many mods to list - thanks to eric for creating www.968forums.com



"It isn't nearly as expensive to do it right as it is to do it wrong."
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#5

I have Lindsey Racing solid camber plates, elephant racing poly bronze torsion tube to spring plate mounts, solid alloy brackets in the two upper mounts of the torsion tube, solid alloy bushes in the torsion tube to body, charlie arms with solid front bushes, alloy/bearing castor mounts and trailing arm to torsion tube mounts (16 points on the car). ARBs are connected at the rear via rod ends, both are mounted via polybush.



The solid alloy torsion tube brackets, torsion tube to body bushes, trailing arm to torsion tube are the 'cheaper' ones regularly sold on US ebay - had absolutely no problems with them. Cannot recall what make the charlie arms are - they are very simlar to the chrome moly Lindsey Racing ones, the castor mounts are Racers Edge.



Also have a near solid (the very small amount of rubber in it is all but rendered useless because of the design) gearbox mount.



Suspension is Bilstein Escort with 600# springs front, 350# rear - still have torsions connected.



All components have been on the car for about 1.5 years now, all appear to be in good order, several thousand miles, maybe 1k miles on track using 236/265 Dunlop D01J/DZ02. Car used primarily for trackdays (although i have raced a 968 on one weekend), i have covered several thousand miles on track in this car with a multitude of suspension/brake combos over the last 5-6 years.



On the road, the car tramlines badly - mainly due to the geometry (and the grooves lorries create on our motorways), the ride is VERY hard, it is ok on the motorway, but a 'A' roads...the car can be a handful and you have to pay attention (again, because UK roads have deteriorated in places over recent years). Not unusable....or even dangerous....but it is very 'alert' and focused. I enjoy it very much for occasional use, but the level of attention required for 100 miles a day 5 days a week would get on your nerves (coupled with my lightweight flywheel and marginally lumpier cams) very quickly.



The track is something different - i have never ever driven a car so focused, compliant and willing to go around corners with such ease. I thought it would be very unforgiving - but on the contrary, lots of feedback and the limit is very very high, when it does start to break away there is good warning (the ability to catch it is something else...driver needs more training!). It is quite dificult to describe just how hard you can push the car and it stays composed - and surprisingly, it likes a bit of 'rough'. It somehow offers some great feedback when you man-handle the car on limits and responds well to a bit of 'ducking and diving' and the odd bit of rough terrain going through corners chasing someone.



There is a caveat though...even on thinner tyres, on track in the wet it can be a handful - the whole set-up is just far too hard for a very wet track, especially under braking. Cornering speed is slower - and you really have to concentrate (it helps hugely finding a line off the racing line in the wet going through corners). I also finding braking quite a tense period in some of the faster corners, you need to remeber to give yourself that little bit more space. On the whole though - i think alot of this latter wet driving could be sorted by adjustable suspension - you have to remeber that the Bilstein Escort is not adjstable for bump/rebound, and i very rarely even adjust my ARB these days.



All in all, an utterley fantastic mod - not cheap, and time consuming to replace all the bushing, but gives a truly wonderful drive on the track...with appropriate tyres and dampers.



As with most mods though, you cannot get a true compromise between road and track.



I am aware of another UK 968 owner whom has gone down a similar route, he posts on here from time to time so may contribute.



UKCS
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#6

Yes i am the "other" owner mentioned above...

I agree with ALL the above that UKCS says. Especially the bit about the wet weather driving + the fact that they are a harsher / more focussing ride on "normal" roads..

My car is a tad "softer" in that it has polybushes on the rear trailing arms + front body mounts of the Torsion tube, it also has adjustable KWv3,,,,other than that they are virtualy identical...

Enjoy...
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#7

Thanks Guys! UKCS and Big Dave: you guys need to post more often..Great info.
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