Maximal POLY Mounts...

[SilverJester]

As I think about past poly mounts I've seen....a lot of times they have metal sleeves that press in the the center, and the bolt is inserted through the sleeve. Just a thought.

[Alex3000GT]

Originally Posted by Maximal

Been working on these here and there a bit and figured I'd post a little teaser pic. I just need to figure out hardware size (unless someone knows the size of the stock mount bolts off the top of their head) then I'll be testing them on my car to see how they work. Keep in mind they might change a bit.



Terry

Wow. The weak spot of our mounts has always been where the reamer bolt goes through the rubber (or poly) and eventually tears right through it over time. I never even THOUGHT of putting the dampening material at the base of the mount. That should absorb vibration, some shock, and not degrade over time.

I'm just curious as to how this design will hold over extended periods of time, like say, 5 years.

Have more pics of the mounts from top/bottom/side?

Very smart idea on your part.

[91Stealth89]

Weak, maximal solids are for real men, lol JkJk good work terry

[1veryfastvr4]

its nice to see ppl trying new things its what moves the platform

this is much like the mounts a buddy got for his srt4.... at first i thought they wouldnt work cause i thought at time the poly would work bolt loose....over time i dont think he has da one bit of a prob

if i recall his kit came with 2 nylock washers back to back..... an in instructions they advised thread to use locker

cant waite to see how they work out.. altho i dont see much vibration in the solids

[BigTyla]

It's a decent idea, but aside from the comments made about probable loosening problems, there will also be a harmonics issue between the engine and the mount since there is nothing in that part of the mount to absorb the vibration. Therefore, you will have some localized vibration transfered back to the motor which could be harmful. It's the reason I've never bought solid mounts and also why even some poly mounts scare me as they simply don't have the same dampening specs as other materials.

I would suggest AT LEAST putting some sort of dampening material in the side where it mounts to the engine. If you wanted to get down-and-dirty you could do a computational vibration analysis to see the difference it would make, but that's probably beyond the scope of this project for you.

[Maximal]

Originally Posted by 3KGTTusch

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.

Exactly. Talked to a few people I know who've been around muscle cars for years and they all say they've seen something similar to them.

Originally Posted by wytaco

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.

Using rubber I can see that happen. The vibrations will wear the rubber down and it's much softer. Poly has good resistance to compression so I really don't see it being a problem. If you saw affects in 4-5 days though it doesn't seem like it'll be long before I do if these are going to have a similar issue.

Originally Posted by Alex3000GT

Wow. The weak spot of our mounts has always been where the reamer bolt goes through the rubber (or poly) and eventually tears right through it over time. I never even THOUGHT of putting the dampening material at the base of the mount. That should absorb vibration, some shock, and not degrade over time.

I'm just curious as to how this design will hold over extended periods of time, like say, 5 years.

Have more pics of the mounts from top/bottom/side?

Very smart idea on your part.

I can get more pics but essentially they're my solids, shortened, and poly underneath them. The front mount has a bottom plate too since it doesn't sit on a flat surface.

Originally Posted by BigTyla

It's a decent idea, but aside from the comments made about probable loosening problems, there will also be a harmonics issue between the engine and the mount since there is nothing in that part of the mount to absorb the vibration. Therefore, you will have some localized vibration transfered back to the motor which could be harmful. It's the reason I've never bought solid mounts and also why even some poly mounts scare me as they simply don't have the same dampening specs as other materials.

I would suggest AT LEAST putting some sort of dampening material in the side where it mounts to the engine. If you wanted to get down-and-dirty you could do a computational vibration analysis to see the difference it would make, but that's probably beyond the scope of this project for you.

Eh, I've been selling the solids for I think 3 years now and have yet to see a problem with them. They're in daily drivers and race cars (Matt M is running them) so I'd say they've proven that those vibrations don't cause any issues.

[BigTyla]

Originally Posted by Maximal

Eh, I've been selling the solids for I think 3 years now and have yet to see a problem with them. They're in daily drivers and race cars (Matt M is running them) so I'd say they've proven that those vibrations don't cause any issues.

It's a lot like the dampener debate for the crank pulley. We'll agree to disagree.

[Maximal]

Originally Posted by BigTyla

It's a lot like the dampener debate for the crank pulley. We'll agree to disagree.

Understandable.

[pearlwhitwin]

Originally Posted by BigTyla

It's a lot like the dampener debate for the crank pulley. We'll agree to disagree.

except that the solid motor mounts have been tested in real cars with real power. solid crank pulleys are on SOHC cars and na DOHC cars making a 15X to the wheels. no one making big power is using a undampened crank pulley. however plenty of them ARE using his solid mounts with no problems.