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02-11-2018, 07:47 PM | #1 |
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Am I "missing out" by not upgrading to solid subframe bushings?
The car currently feels pretty damn good with my current suspension and wheel/tire setup. I'm also putting down 550+whp on my ESS kit and the car puts the power down to the ground pretty well. I had planned on getting solid subframe bushings but I'm not convinced that I need them at this point.
Here is my suspension and wheel/tire setup: KW V3 coilovers RD sport front sway bar (set on medium) Brand new OEM control arms/tension arms/tie rods Bimmerworld front sway bar end links Rogue engineering rear toe arms ECS tuning performance rear trailing arms Volk TE37 18x9.5/10.5 Michelin PSS 275/35/18 295/35/18 Brembo 380/380 street alignment The car is 100% street driven. Wondering if I'm "missing out" by not going with solid subframe bushings. Seems it may be mostly a benefit for track cars.
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02-11-2018, 08:09 PM | #2 |
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Makes a difference you can feel even on the street with 400 rwhp. And mine aren’t even solid - 75D poly. You have a lot of fancy parts but your subframe is still moving around.
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02-11-2018, 08:15 PM | #4 |
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you have a long list of things you don't need for a 100% street car. solid sub/diff bushings are just another enhancement on that list. obviously, you have a few bucks to throw around on your car, so i presume you enjoy it, and the ~$2,200 to do solid bushings isn't a ridiculous amount for you.
so you see, its relative. its not like you have $2k to do ONE mod for the year. i love the way it makes the car feel, especially with the one piece carbon driveshaft. its very racy, but the direct feel may not be for everyone. if you're ever in socal, i can take you for a ride.
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02-11-2018, 08:20 PM | #5 |
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this is a video i took under my car. i'm not doing anything crazy or dangerous. i'm simply accelerating and slowing down. everything moving is lost energy that would otherwise be transferred to the ground. literally.
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02-11-2018, 08:55 PM | #6 |
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My car is daily driven and solid subframe bushings is still one of the best mods I've ever done. It totally eliminated the side-to-side shimmy when the car went over ruts and bridge joints. I hated that. I feel that the M3 should have come from factory with solid subframe bushings.
But then, it didn't cost me $2k to do it here either. Labor in my country is much cheaper. |
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02-11-2018, 09:15 PM | #8 |
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yes, it requires dropping the entire rear subframe. that includes removing the rear suspension, disconnecting brake lines (flush when you put them back on), pressing in/out bushings, reassembly, and an alignment. it is a very long day, even with the right tools and a lift. plus, its moving around large, cumbersome parts.
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02-11-2018, 10:45 PM | #10 |
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i'm not sure what his method is, but he replaced those ~6" brake lines with stainless lines while he was in there. no sense in touching those if you aren't really taking the subframe out. i thought it was cool that he included that though.
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02-11-2018, 10:48 PM | #11 | |
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02-11-2018, 10:54 PM | #12 |
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i'm not 100% sure, but i don't think i had anything different done. it may have been extra for the 6" stainless lines and i said "go ahead." i also run SRF brake fluid, so its a little bit more (not a ridiculous amount, but it contributes). labor might be just a little more expensive out here. which makes sense, things like labor, real estate, etc., vary by region while things like SRF fluid cost the same across the country.
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02-12-2018, 06:20 AM | #14 |
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I decide to do the solid subflame bushing the second after I test drove my friend's F82.....
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02-12-2018, 06:48 AM | #15 | |
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02-12-2018, 07:07 AM | #16 |
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I get what you're saying, but that's what I would consider "dropping" it. I bit the bullet and paid, too much for me to do on jack stands...
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02-12-2018, 09:10 AM | #17 |
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You wrote you had to remove the rear suspension and move around large cumbersome parts but you don’t have to do either. I did take the wheels off.
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02-12-2018, 01:08 PM | #18 | |||
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haha my car would still be more expensive to do. the entire varis diffuser needs to come off in addition to whatever else. if i do find a place at a decent rate i'll let you know!
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02-12-2018, 02:30 PM | #19 |
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I noticed immediately. With the stock bushings you could feel the rear move a little as the suspension set when turning hard at speed and if you then turned the other way, you could feel it move and set in the other direction. Not wiggly like a modded 135i that I drove, but it moved. With the 75D poly bushings I don’t notice any shift in the rear. Honestly, I did not think it would be as noticeable as it was. My bushings were 9 years and 85k miles old, and that may have made the improvement more noticeable.
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02-12-2018, 03:06 PM | #21 | |
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