Solid motor mounts recommendation
Thread Starter
Melting Slicks
Joined: Jan 2006
Posts: 3,028
Likes: 2
From: North NJ
Solid motor mounts recommendation
Looking to switch from Energy Suspension Poly engine mounts to solid mounts. I want to give the solid mounts a try b/c I am not happy with the way the poly mounts are holding up. They're softer than rubber at this point and I'm not sure if that has to do with the engine or hooker headers heat.
We'll see how much more vibration translates from the block to the car.
Can this hurt the engine block now that it will be serving as a structural member? frame twist tension hurt the block casting? Its a Merlin 509 block.
Any recommendations?
I see Moroso ones on Summit and Jegs and they're .188 thick. $23-$28
Any other recommendations? Its a BBC 509ci (same mounts as 454ci)
Thanks
We'll see how much more vibration translates from the block to the car.
Can this hurt the engine block now that it will be serving as a structural member? frame twist tension hurt the block casting? Its a Merlin 509 block.
Any recommendations?
I see Moroso ones on Summit and Jegs and they're .188 thick. $23-$28
Any other recommendations? Its a BBC 509ci (same mounts as 454ci)
Thanks
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
Looking to switch from Energy Suspension Poly engine mounts to solid mounts. I want to give the solid mounts a try b/c I am not happy with the way the poly mounts are holding up. They're softer than rubber at this point and I'm not sure if that has to do with the engine or hooker headers heat.
We'll see how much more vibration translates from the block to the car.
Can this hurt the engine block now that it will be serving as a structural member? frame twist tension hurt the block casting? Its a Merlin 509 block.
Any recommendations?
I see Moroso ones on Summit and Jegs and they're .188 thick. $23-$28
Any other recommendations? Its a BBC 509ci (same mounts as 454ci)
Thanks
We'll see how much more vibration translates from the block to the car.
Can this hurt the engine block now that it will be serving as a structural member? frame twist tension hurt the block casting? Its a Merlin 509 block.
Any recommendations?
I see Moroso ones on Summit and Jegs and they're .188 thick. $23-$28
Any other recommendations? Its a BBC 509ci (same mounts as 454ci)
Thanks
Thread Starter
Melting Slicks
Joined: Jan 2006
Posts: 3,028
Likes: 2
From: North NJ
I've heard from a few people on here that they had no vibrations with the solids.
I find that hard to beleive, but my poly onese are like mush right now and they're suppose to be durable.
I even have the stock 427 little metal exhaust heatshields that surround the motor mounts.
In the end it may be $25 just to say I tried it and didn't like it.
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Not much more if any vibration. My shifter vibrates more with poly than with the solids. Thing I didn't like about solids is the clunk I got changing gears even at low rpm's, went to the polys and no more clunk into a gear 
Thread Starter
Melting Slicks
Joined: Jan 2006
Posts: 3,028
Likes: 2
From: North NJ
You go with Energy Suspension poly's or Prothane?
Thread Starter
Melting Slicks
Joined: Jan 2006
Posts: 3,028
Likes: 2
From: North NJ
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Burning Brakes
Joined: Jan 2006
Posts: 1,088
Likes: 181
From: NC
2022 C2 of the Year Finalist - Modified
I installed a solid motor mount on the drivers side of my BB to stop the engine from lifting and hitting the hood. There is no more vibration now then there was with rubber mounts.
BILL SR
BILL SR
Race Director
Joined: Apr 2000
Posts: 17,676
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From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Burning Brakes
Joined: Dec 2003
Posts: 1,004
Likes: 7
From: Adelaide South Australia
Or you could use standard rubber mounts and put a bolt through it. Works well for me.
Rubber is still there to absorb vibration, bolts are there to prevent breakage from over extension!
Rubber is still there to absorb vibration, bolts are there to prevent breakage from over extension!
Le Mans Master
Joined: Jan 2006
Posts: 6,506
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From: Butler Pa
Racer
Joined: Dec 2003
Posts: 399
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From: Haslet,Texas
Not sure, but gonna give it a try.
I've heard from a few people on here that they had no vibrations with the solids.
I find that hard to beleive, but my poly onese are like mush right now and they're suppose to be durable.
I even have the stock 427 little metal exhaust heatshields that surround the motor mounts.
In the end it may be $25 just to say I tried it and didn't like it.
I've heard from a few people on here that they had no vibrations with the solids.
I find that hard to beleive, but my poly onese are like mush right now and they're suppose to be durable.
I even have the stock 427 little metal exhaust heatshields that surround the motor mounts.
In the end it may be $25 just to say I tried it and didn't like it.
Thread Starter
Melting Slicks
Joined: Jan 2006
Posts: 3,028
Likes: 2
From: North NJ
Appreciate all the comments guys!
I'm going to give the solids a try and will let you guys know if there are any increased vibrations.I'll inspect the poly's when i pull them out and see if I can figure out the cause for failure. If I don't like the solids I might try the rubber mount with the bolt approach. Thanks!
Le Mans Master
Joined: Dec 2003
Posts: 5,727
Likes: 38
From: Fremont CA
Melting Slicks
Joined: Feb 2001
Posts: 3,330
Likes: 13
From: Europe , Luxembourg
Hi
The poly mounts are heat sensitive.
A friend tried them on his 65 vintage race car and he was wondering about his shifter dropping down.
He found that the polys melted due to the headers.
Went back to rubber and all is OK.
Rgds. Günther
The poly mounts are heat sensitive.
A friend tried them on his 65 vintage race car and he was wondering about his shifter dropping down.
He found that the polys melted due to the headers.
Went back to rubber and all is OK.
Rgds. Günther
Thread Starter
Melting Slicks
Joined: Jan 2006
Posts: 3,028
Likes: 2
From: North NJ
I would have assumed that poly would hold up better to heat than rubber. I think thats my problem is the hooker header heat, although I don't think I would be the first to have this issue. I even have the stock big block little aluminum heat shield things that came from the factory to protect the mounts.
Melting Slicks
Joined: Sep 2007
Posts: 2,387
Likes: 123
From: CA.
i broke a stock rubber mount on my 454. the one that broke luckily had the T THAT ACTS AS A SEFETY so you dont damage hood but it still let engine up high enough to let fan break shroug. one that broke looked brand new. was in car when i bought it 2 years ago. i replaced with same but now im scared to get on it from a dead stop. what i found out was same mount is used with the 350 and 454.