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Post by myothercarsa2cv on Oct 15, 2016 10:08:55 GMT
I'm about to spend the foreseeable future fixing my diff. Yay. So question for the Mighty5ers...
Void fillers or poly?
Do void fillers only work if your original bushes are in good nick? Will poly remove my teeth? Appreciate any and all advice!
John
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Post by Horney on Oct 15, 2016 13:08:16 GMT
Never tried either but I'd be tempted by void fillers first. You need some flex or you break the casing.
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Post by Vindi (Russell) on Oct 21, 2016 9:17:51 GMT
Have to admit I've gone straight to the Garage Star ones ... I know there will be more noise / vibration but it's not exactly a daily. Not sure about cracking cases, I haven't looked into it but the local guys who had broken cases did it with standard bushes, and standard power cars so I think it might be more to do with driving style? Both take part in hillclimbs.
Russell
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Post by Rickster on Oct 21, 2016 10:15:14 GMT
I had poly (from a full set of bushes off eBay - cheap orange) On my old 1.6, tracked it, used it as a daily for over a year no probs
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Post by wigwambam on Oct 22, 2016 20:41:29 GMT
My diff bushes weren't in fantastic condition and after fitting the void fillers there was a noticeable difference. I was swapping my diff anyway as a spline was stripping but I reckon you could fit them quite easily in an hour or two just by undoing the mounts then concentrating on one side at a time. Noticable difference compared to the floppy old ones, a little less trampy on low speed turns and possibly throttle feel is a bit more nuanced now without the boingy windup. I haven't broken a diff again yet and I did not have void fillers or decent bushes the last time one broke.
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Post by myothercarsa2cv on Oct 22, 2016 22:06:35 GMT
Thanks all. Diff is coming out so if I replace the lot then now's the time to do it. I'll see what they look like and make a call. If they've got some life, void fillers, if now, poly. Cheers!
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Post by atlex on Oct 22, 2016 22:35:05 GMT
what do these actually do ?
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Rasc
Chats A Bit
Nutz troll apparently
Posts: 130 
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Post by Rasc on Oct 23, 2016 9:13:08 GMT
what do these actually do ? This is a cut and paste from Nutz that somes it quite well and saves me typing a lot... Exactly what it says on the tin. The rubber bushes have voids in them to allow the rubber bush to flex and move, which means that the diff is basically floating on two flexible rubber supports. This takes a lot of the harshness out of the rear end, and reduces noise in the cabin, however when these rubber bushes get older and start to perish, the diff can move too much, or in an unusual way, which can lead to axle tramp, and the car pulling to one side under acceleration. The hard poly void fillers compress into these voids, taking this movement out of the diff. The result is that the rear of the car has a much more positive feel, with torque being transferred far more directly to the wheels, without wasting power twisting bushes. The downside is that there's quite a bit more noise in the cabin. It increases feedback significantly and gives the car a much more controllable feel, especially when steering with the throttle, or balancing the car mid-corner. They're cheap as well. I have these on my list of essentials for any MX5 I buy, along with braces and decent brake pads. But then I love the feedback and don't mind the sacrifice of some comfort. |
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Rasc
Chats A Bit
Nutz troll apparently
Posts: 130
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Post by Rasc on Oct 23, 2016 9:15:08 GMT
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Post by josho on Oct 24, 2016 15:51:21 GMT
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le sigh