anyone have experiences with solid motor mounts?
Thread Starter
Race Director
Joined: Sep 2001
Posts: 14,678
Likes: 751
From: NEwhere Ohio
anyone have experiences with solid motor mounts?
I just installed some solid motor mounts made by user Churchkey.
Id love to hear about driving impresions with solid motor moutns vs. heavy rubber mounts.
Im looking forward to the driving experience with these, and my polyurethane batwing mounts.
Im hoping that car stiffness improves and the trans/ diff/c-beam now become part of the frame structure of the car.
If anyone can let me know what to expect, Id love to hear.
BTW. Im not worried about increased vibrations - I believe it to be mostly myth. I have a great superdamper crank pulley on there (6+8 to drive my supercharger) and also the driveline is balanced well.
Id love to hear about driving impresions with solid motor moutns vs. heavy rubber mounts.
Im looking forward to the driving experience with these, and my polyurethane batwing mounts.
Im hoping that car stiffness improves and the trans/ diff/c-beam now become part of the frame structure of the car.
If anyone can let me know what to expect, Id love to hear.
BTW. Im not worried about increased vibrations - I believe it to be mostly myth. I have a great superdamper crank pulley on there (6+8 to drive my supercharger) and also the driveline is balanced well.
Le Mans Master
Joined: Nov 2009
Posts: 6,882
Likes: 234
From: Bangkok, Thailand
Vibrations are NOT a myth. I tried solid mounts in my 68 Charger when I had one of the 440's in it. Everything buzzed at different rates as engine speed changed - to the point that a piece of my interior window trim fell in my lap while at a red light.
Aside from that there was no benefit at all except perhaps a slight increase in the ability to break the tires loose.
With all the squeaks and creaks already present in a C4 I wouldn't do anything to make it worse.
On top of that I can't see where bolting the block solidly to the frame is going to make any noticeable difference in stiffness. The C-beam would be the supposed stiffness brace between the block/frame and the rear of the car but it's only designed to deal with force in one direction (pinion rise). You'd have to have a torque tube like the C5 & C6's have if you really wanted to do something like that.
And if you think the "heavy" rubber mounts are worth replacing with solid steel to save weight just take a good dump before you go driving, or skip the Whopper & fries - you'll save about as much weight.
Aside from that there was no benefit at all except perhaps a slight increase in the ability to break the tires loose.
With all the squeaks and creaks already present in a C4 I wouldn't do anything to make it worse.
On top of that I can't see where bolting the block solidly to the frame is going to make any noticeable difference in stiffness. The C-beam would be the supposed stiffness brace between the block/frame and the rear of the car but it's only designed to deal with force in one direction (pinion rise). You'd have to have a torque tube like the C5 & C6's have if you really wanted to do something like that.
And if you think the "heavy" rubber mounts are worth replacing with solid steel to save weight just take a good dump before you go driving, or skip the Whopper & fries - you'll save about as much weight.
Melting Slicks
Joined: Jan 2009
Posts: 3,482
Likes: 196
From: folsom california
there was a series of threads awhile back regarding solid motor mounts; those that installed them seemed quite happy while those who had not remained skeptical.
If we're talking LT style mounts, an upgrade seems to be to replace the fluid filled stock mounts with solid rubber mounts available in the aftermarket (at a substantial discount over oem style mounts).
Please let us know how your solid mounts work for you.
If we're talking LT style mounts, an upgrade seems to be to replace the fluid filled stock mounts with solid rubber mounts available in the aftermarket (at a substantial discount over oem style mounts).
Please let us know how your solid mounts work for you.
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Some like em some dont.
I prefer to have a little give in the system so nothing breaks over time
Not saying they will but can.
You can always make a torque limiter if youre worried about busting a mount.
I prefer to have a little give in the system so nothing breaks over time
Not saying they will but can.
You can always make a torque limiter if youre worried about busting a mount.
Race Director
Joined: Oct 2000
Posts: 14,064
Likes: 1,166
From: N. Alabama
I just installed some solid motor mounts made by user Churchkey.
Id love to hear about driving impresions with solid motor moutns vs. heavy rubber mounts.
Im looking forward to the driving experience with these, and my polyurethane batwing mounts.
Im hoping that car stiffness improves and the trans/ diff/c-beam now become part of the frame structure of the car.
If anyone can let me know what to expect, Id love to hear.
BTW. Im not worried about increased vibrations - I believe it to be mostly myth. I have a great superdamper crank pulley on there (6+8 to drive my supercharger) and also the driveline is balanced well.
Id love to hear about driving impresions with solid motor moutns vs. heavy rubber mounts.
Im looking forward to the driving experience with these, and my polyurethane batwing mounts.
Im hoping that car stiffness improves and the trans/ diff/c-beam now become part of the frame structure of the car.
If anyone can let me know what to expect, Id love to hear.
BTW. Im not worried about increased vibrations - I believe it to be mostly myth. I have a great superdamper crank pulley on there (6+8 to drive my supercharger) and also the driveline is balanced well.
Ooops, sorry. I drifted over here into C4 forum. My LT4 is running stock suspension and mounts. YMMV.
Last edited by SouthernSon; Mar 26, 2013 at 02:43 PM.
Thread Starter
Race Director
Joined: Sep 2001
Posts: 14,678
Likes: 751
From: NEwhere Ohio
Vibrations are NOT a myth. I tried solid mounts in my 68 Charger when I had one of the 440's in it. Everything buzzed at different rates as engine speed changed - to the point that a piece of my interior window trim fell in my lap while at a red light.
Aside from that there was no benefit at all except perhaps a slight increase in the ability to break the tires loose.
With all the squeaks and creaks already present in a C4 I wouldn't do anything to make it worse.
On top of that I can't see where bolting the block solidly to the frame is going to make any noticeable difference in stiffness. The C-beam would be the supposed stiffness brace between the block/frame and the rear of the car but it's only designed to deal with force in one direction (pinion rise). You'd have to have a torque tube like the C5 & C6's have if you really wanted to do something like that.
And if you think the "heavy" rubber mounts are worth replacing with solid steel to save weight just take a good dump before you go driving, or skip the Whopper & fries - you'll save about as much weight.
Aside from that there was no benefit at all except perhaps a slight increase in the ability to break the tires loose.
With all the squeaks and creaks already present in a C4 I wouldn't do anything to make it worse.
On top of that I can't see where bolting the block solidly to the frame is going to make any noticeable difference in stiffness. The C-beam would be the supposed stiffness brace between the block/frame and the rear of the car but it's only designed to deal with force in one direction (pinion rise). You'd have to have a torque tube like the C5 & C6's have if you really wanted to do something like that.
And if you think the "heavy" rubber mounts are worth replacing with solid steel to save weight just take a good dump before you go driving, or skip the Whopper & fries - you'll save about as much weight.
That same kind of person is not going to like the tiny amount of vibration. I happen to love my lightweight flywheel so I think it will work out.
Heck Ive heard that Porsche 911 offers solid motor mounts as options for the serious racer.
BTW. You dont need a torque tube to make the engine/trans/c-beam/batwing become a stiffening member of the frame. If you have a vert x-brace, you can weld a side-to-side trans mount off that connected from one side of the frame to the other. Heck, really dont need a x-brace to do that either.
Last edited by dizwiz24; Mar 26, 2013 at 03:27 PM.
