Maximal POLY Mounts... - Page 3 - 3000GT/Stealth International Message Center

Maximal · 07-10-2008, 07:02 AM

Quote:

Originally Posted by pearlwhitwin

So you put the poly in between the motor mount and the area that the motor mount will bolt to. and you think that part is going to flex? Either i am way off base here or this is in fact a design that is obviously not going to work. Does anyone else understand what i am getting at? If that motor mount is bolted down like stock i don't see how it could possibly flex even if you had a slab of the softest poly/rubber. all that poly is going to do is getting smashed flat... thats it. In order for this design to work you would need to leave the bolts really loose. I am not trying to bash it is just that this seems so obvious to me.

It will be absorbing the vibrations between the mount and the body itself. Some may transfer through the bolts but I believe the majority of it will be absorbed. Again...rough idea here guys. If I end up selling the same exact thing that's in those pics I'll be surprised, my solid mounts went through a few design changes also before they were ready.

Maximal · 07-10-2008, 07:19 AM

Quote:

Originally Posted by i3igpete

sorry terry, but i have to agree with max. when the poly compresses through the bracket, it will take tension off of the bolt. which makes it likely the nut will work itself off the bolt. the softer the poly, the worse it'll be.

maybe nylon would be a better choice if you decide to go ahead with this. but then again i guess it's defeating the purpose if the coupling material is too stiff.

Actually that gives me an idea...think I might have the problem solved. Might lead to some increased vibrations but I think it'll still be better than solids.

jandoaudio · 07-10-2008, 08:26 AM

Like a few others have stated, thinking outside the box is good to see, but my opinion is that you will have trouble keeping bolts tight along with loading them incorrectly resulting in sheared and bent bolts. If you had a good way to attach to the top and bottom surface with nothing passing through then it would work

Maximal · 07-10-2008, 08:29 AM

Actually I looked into how some other poly mounts were designed and a lot have a bolt compressing the poly and holding them together so I'm thinking this will be less and less of an issue. These are poly which is rather hard (I'm not gonna be running 60A poly in these)....not rubber.

Muscle car poly mounts basically consist of 2 brackets connected with a rod of poly...what I'm doing here is much different except for the fact there is only 1 bracket.

Maximal · 07-10-2008, 08:36 AM

Example....some Supra mounts: http://www.bicperformance.com/images...20(Medium).JPG

Somewhat different but you're still clamping onto the poly: http://www.mustangmods.com/ims/u/942/1246/113055.jpg

Some e30 mounts that are again clamping down on poly: http://www.vorshlag.com/images/catal...e30_poly01.jpg

Yeah, they're all a bit different but at the same time there is something being bolted down on poly and I'm assuming it's not coming apart.

Hannibalzero · 07-10-2008, 09:24 AM

Interesting design. I'd torque the bolts properly before the BRG, run the hell out of the car on the T.O.D., and check to see if the torque specs have change on any of the bolts. While it would be good to get a longterm test of the poly, 300+ curves would be a pretty decent test in a short timeframe.

AdamVR4 · 07-10-2008, 09:26 AM

Thread locker is a must. Nylock nuts where applicable would do the trick. Good luck Terry.

Maximal · 07-10-2008, 09:59 AM

Quote:

Originally Posted by Hannibalzero

Interesting design. I'd torque the bolts properly before the BRG, run the hell out of the car on the T.O.D., and check to see if the torque specs have change on any of the bolts. While it would be good to get a longterm test of the poly, 300+ curves would be a pretty decent test in a short timeframe.

That's what I figured. They're easy enough to swap if everything goes to shit with them so I'm not that worried.

Quote:

Originally Posted by AdamVR4

Thread locker is a must. Nylock nuts where applicable would do the trick. Good luck Terry.

Yep, Figured some locktight and there won't be any issues. I'm still thinking they might be fine anyways. Oh well, we'll see.

3KGTTusch · 07-10-2008, 10:02 AM

My roommate has something very similar in his 68 camaro, and I was really confused what the benefit of them was in this type of application, but clearly it works because its not uncommon through out platforms.

wytaco · 07-10-2008, 10:36 AM

when i first got your mounts i had a similar idea. I put rubber in that same spot and tightened her down with some red loctite. Even with the loctite it only took about 4 or 5 days for it to wiggle itself loose. The front mount will probably be fine. That rear mount just takes so much abuse.

07-10-2008, 08:26 AM	#23 (permalink)
jandoaudio Staying in the Family Join Date: Sep 2001 Location: Bozeman, Montana Drives: 95 RT/TT Trader Rating: (13)	Re: Maximal POLY Mounts... Like a few others have stated, thinking outside the box is good to see, but my opinion is that you will have trouble keeping bolts tight along with loading them incorrectly resulting in sheared and bent bolts. If you had a good way to attach to the top and bottom surface with nothing passing through then it would work __________________ 92 VR4 Blacked out with a 98 conversion dr900's Fully forged 3.1L Stage 3 Heads 98 Jeep TJ 37's Locked with all the toys Cheap, Fast, Reliable.... You can only have two

07-10-2008, 08:29 AM	#24 (permalink)
Maximal Supporting Vendor Join Date: Jan 2002 Location: Painted Post, NY Drives: '91 Stealth "ES" Trader Rating: (183)	Re: Maximal POLY Mounts... Actually I looked into how some other poly mounts were designed and a lot have a bolt compressing the poly and holding them together so I'm thinking this will be less and less of an issue. These are poly which is rather hard (I'm not gonna be running 60A poly in these)....not rubber. Muscle car poly mounts basically consist of 2 brackets connected with a rod of poly...what I'm doing here is much different except for the fact there is only 1 bracket.

07-10-2008, 08:36 AM	#25 (permalink)
Maximal Supporting Vendor Join Date: Jan 2002 Location: Painted Post, NY Drives: '91 Stealth "ES" Trader Rating: (183)	Re: Maximal POLY Mounts... Example....some Supra mounts: http://www.bicperformance.com/images...20(Medium).JPG Somewhat different but you're still clamping onto the poly: http://www.mustangmods.com/ims/u/942/1246/113055.jpg Some e30 mounts that are again clamping down on poly: http://www.vorshlag.com/images/catal...e30_poly01.jpg Yeah, they're all a bit different but at the same time there is something being bolted down on poly and I'm assuming it's not coming apart.

07-10-2008, 09:24 AM	#26 (permalink)
Hannibalzero H to the izzO Join Date: Jan 2003 Location: Northern VA Drives: Recklessly Trader Rating: (55)	Re: Maximal POLY Mounts... Interesting design. I'd torque the bolts properly before the BRG, run the hell out of the car on the T.O.D., and check to see if the torque specs have change on any of the bolts. While it would be good to get a longterm test of the poly, 300+ curves would be a pretty decent test in a short timeframe. __________________

07-10-2008, 09:26 AM	#27 (permalink)
AdamVR4 TEXAS!! FIGHT!! Join Date: Jul 2002 Location: University of Texas Drives: NoCar XCase Test Car Trader Rating: (22)	Re: Maximal POLY Mounts... Thread locker is a must. Nylock nuts where applicable would do the trick. Good luck Terry. __________________ PEARL WHITE '93 VR-4 // Under Construction. Looking forward to lighting up the drag radials E16G's: 10.573 @ 135.01 (Trevor owns me ) E16G's: 11.28 @ 124.7 (Pure pump gas ET record ) 14B's: 11.10 @ 127.3 (AWD 14B ET record. Take THAT, Trev! ) 9B's: 12.78 @ 107.1 Congrats to the current top 10 members!! DynamicRacing: US 3S Top 10 Fastest List

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07-10-2008, 10:02 AM	#29 (permalink)
3KGTTusch Forum Member Join Date: Mar 2005 Location: IN and OH Drives: Wishing Trader Rating: (0)	Re: Maximal POLY Mounts... My roommate has something very similar in his 68 camaro, and I was really confused what the benefit of them was in this type of application, but clearly it works because its not uncommon through out platforms.

07-10-2008, 10:36 AM	#30 (permalink)
wytaco Verified Seller Join Date: Jan 2005 Location: petaluma,ca Drives: 91 vr4, 04 tacoma Trader Rating: (1)	Re: Maximal POLY Mounts... when i first got your mounts i had a similar idea. I put rubber in that same spot and tightened her down with some red loctite. Even with the loctite it only took about 4 or 5 days for it to wiggle itself loose. The front mount will probably be fine. That rear mount just takes so much abuse.