Subject	The problem with your concept is it isn't a true "isolator"
Posted by	LitlElvis on July 23, 2016 at 1:55 PM
	This message has been viewed 572 times.
In Reply To	Re: Enthusiasm = 10, technical accuracy = 0, humility = -10 posted by 1308cats on July 23, 2016 at 08:43 AM
Message	And I say this because your through-stud attaches rigidly to both the chassis and the engine. Regardless of hockey pucks being located in between, any engine vibration will be directly transferred into the chassis via the stud. To truly isolate vibration, you will need to break the rigid link between engine and chassis. The OEMs do this by bonding the rubber to both metal sides of the mount and this eventually fails with age and over-loading. The real trick is to do it mechanically as depicted below. Motor mounts are exposed to both pulling (tension) and pushing (compression) forces. Under engine load, the driver side (USDM left) will have a tension force applied to the mount while the passenger side mount will have a compression force applied. What happens when your mount design has tension applied to it? Answer: direct transfer of load to the chassis via the stud... the hockey pucks do nothing. What happens when your mount design has compression applied to it? Answer: the hockey pucks will compress but in doing so, the stud will become loose and can act as a saw blade against the chassis slot and/or OEM aluminum mount arm. You might be able to preload the assembly enough to help the stud from becoming too loose under compression, but no matter what you do the stud will always move with any compression loading. Your concept may be able to hold the engine up, but it will not isolate any engine vibration from the chassis whatsoever. Here's a cross section of how I do it - maybe you can incorporate hockey pucks into something similar so you can say "I did it".
Follow Ups	Hockey puck motor mounts - 1308cats 17:28:12 07/21/16 Eh. Prolly good enough for the car jack...Dont think I would - ForceFedTT (SoCal) 17:46:49 07/21/16 Is there a rash of motor mount failures we're not aware of? - Nate (NoVA) 20:06:33 07/21/16 2nd that. (n/m) - CameronSF 20:44:42 07/21/16 No. (n/m) - Bernie (NoVA) 20:19:49 07/21/16 LOL. I detect a theme here. (n/m) - CameronSF 20:45:27 07/21/16 With all due respect, most of us have long ago learned the - Gordo 93TT Daytona 21:11:35 07/21/16 er, or you can buy Ford F-150 mounts cheap - vorpalZ 00:06:55 07/22/16 Are the "Ford" mounts still a thing? - Bernie (NoVA) 00:52:15 07/22/16 because theyre infinitely superior to butchered hockey pucks (n/m) - vorpalZ 01:25:23 07/22/16 wouldn't that be akin to defacing currency in Canada? - LJZTT 17:03:56 07/22/16 nope. Innovative use of pucks is welcomed ... - ConVerTT 17:43:40 07/23/16 interesting.... - LJZTT 09:10:51 07/25/16 I'm still using the Ford mounts and they work...but - xpwarrior 08:14:32 07/22/16 They're on my Z - BlackholeZ 14:29:17 07/24/16 i would buy BDE mounts if i were you, but if you - slayer fan 00:18:31 07/22/16 Motor mount hockey pucks .... - ConVerTT 08:39:24 07/22/16 Give it a try. - Sixbanger 10:04:43 07/22/16 Enthusiasm = 10, technical accuracy = 0, humility = -10 - LitlElvis 13:42:58 07/22/16 ^^^^^ Listen to this guy. (n/m) - spicyZ 19:53:02 07/22/16 Re: Enthusiasm = 10, technical accuracy = 0, humility = -10 - 1308cats 08:43:27 07/23/16 The problem with your concept is it isn't a true "isolator" - LitlElvis 13:55:24 07/23/16 I love it! - ZXRider 02:51:02 07/24/16 Only if it were a VG30DETT powered FSAE team :) - LitlElvis 11:48:28 07/24/16 Awesome. Thanks for the explanation. - ZXRider 19:25:53 07/27/16 Ah the FSAE days (n/m) - -Grimm- 10:11:05 07/25/16 Re: Hockey puck motor mounts - Bigwill837 14:13:12 07/22/16 This year you likely will need a Pittsburgh Penguins Hockey - MixManMash 06:38:15 07/23/16
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