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Old 07-12-2012, 03:34 AM   #1
SoCal_Scooby
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Default Solid engine mounts bad?

I want to buy solid engine mounts, MSI of course, but i want to know if it's bad for the engine? I heard it transmits bad vibration into the motor and destroys it by offsetting the harmonic balancer or overall balance of the engine? Are they safe to run? I DD/track, NHV don't bother me i have almost every bushing
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Old 07-12-2012, 04:53 AM   #2
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what is this madness.

MSI doesn't sell rubbish.
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Old 07-12-2012, 09:18 AM   #3
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As long as you are buying quality parts, the only bad part is crap loads more NVH.

Since that is not an issue, buy them if that is what you want to do.

Your concern may be due to something like this:
Quote:
Originally Posted by LS1Tech.com
For what it's worth. You NEVER run solid motor-solid trans, in any street car.
If you do, you will break, the case one day. It might be a day, or 3 years.
I don't care who recommends it. Don't do it. Anyone with a clue says the same thing.
It has been proven thousands of times, only a professional quality chassis should use solid-solid
.
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Old 07-12-2012, 09:45 AM   #4
No Limit Motorsport
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No doubt that MSI makes top quality stuff, but the idea of completely solid motor mounts has always made me uneasy too, NVH aside, I would be afraid of cracking the engine case. Perhaps the EJ is really strong where the mounts bolt in though.
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Old 07-12-2012, 10:53 AM   #5
the suicidal eggroll
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The NVH increase you get from bushings is nothing compared to what you'll get from solid engine mounts. Talk about a droning nightmare...even if there wasn't a risk I would never do it, and this is coming from somebody who also has every bushing and stiffer motor mounts already.
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Old 07-12-2012, 11:20 AM   #6
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I have group N engine and tranny and the AP solid pitchstop. its tough. on cold starts the pistons are very loud inside the car lol.
it does make a lot of gear whine as well inside the cabin. but honestly I like it because i can hear whats going on inside the engine better. And the shifting is incredibly crisper.

go with cusco or torque solutions or tomioka mounts. very strong but still have rubber in them. And IMO once they are broken in its no differant than group N mounts.
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Old 07-12-2012, 12:19 PM   #7
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Ive used welded steel mounts on multiple h6s and ej20s, and all it does is connect the driver to the chassis. There is no OMG DRONE OMG RATTLE, and there isn't any detraction from a DD.

The sidewalls of my tires do take the swaying of my rotational idle though, its like a cammed sbc
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Old 07-12-2012, 02:35 PM   #8
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Quote:
Originally Posted by NW2TONE View Post
go with cusco or torque solutions or tomioka mounts. very strong but still have rubber in them. And IMO once they are broken in its no differant than group N mounts.
I have had the cusco and group n and the cusco def have a decent amount more NVM then the grp n. the pitch stop is where you'll get the most NVM.
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Old 07-12-2012, 02:59 PM   #9
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megan's here. no increased NVH on the engine side - the gearbox one increased the whine a bit.
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Old 07-12-2012, 03:08 PM   #10
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This is a question I've pondered myself. Reason being is that I work for an aerospace company which is currently in the process of designing a new business jet. We recently had a design change to the engine pylon (The thing that holds the engine), which resulted in the pylon being stiffer. This in turn led our engine supplier to investigate whether the engine's bearings would need to be beefed up to handle the vibration loads that the pylon couldn't absorb.

Now, I know I'm comparing a 5000 lb turbine to a 200 lb H4/H6, but I would think the same principles apply. The car is more resistant to vibration than the engine (much more mass), so if the vibrations and stresses can't be absorbed by the mounts moving, do those stresses feed back into the engine?
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Old 07-12-2012, 03:42 PM   #11
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Quote:
Originally Posted by Crazy_pilot View Post
so if the vibrations and stresses can't be absorbed by the mounts moving, do those stresses feed back into the engine?
No, more than likely, the stresses will be fed into the crossmember and thus into the body of the car....which wouldn't really hurt anything...and is the cause of the NVH people are talking about.
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Old 07-12-2012, 05:14 PM   #12
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Why do you want solid mounts? Is this a track only car?

I'm very partial to the Cusco mounts.
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Old 07-12-2012, 08:25 PM   #13
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I had beatrush mounts, I liked them alot but they raise the motor 3mm or so. Caused some clearance issues with my setup. I also have a gruppe-n trans mount and recently swapped to the MSI mount due to their 7mm shorter height. I havent ran the car yet and the only thing Im worried about is false knock. Other than that TIC assured me that they are only slightly harder than the beatrush at idle and not really a differance running around.( other than shift feel) I also removed my oem pitch mount to see if there is any change as other companies such at Zerosports runs solids without a pitch stop.
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Old 07-14-2012, 02:29 AM   #14
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I welded up my OEM mounts with some 1/4'' flat stock I had sitting around, been running it like that for 3 years no problems. It seems to launch much nicer, and I don't have any shifter movement to bother me.

I've abused the car a little; dumped the clutch at 7000RPM, I've done 1.5x 60 foot passes on winter tires at the drag strip with the old Carbonetics twin disc. It's seen lots of wheel hop at the drag strip when I was learning how to launch correctly. It's been solid since stock turbo, 30R and now twin scroll BW!

It only vibrates right off of idle, then it smoothes out and you don't feel anything. Maybe I made it just right and they aren't too rigid just like the newer aluminum dirtbike chassis, retaining a little flex. I DID add larger outer diameter washers between the chassis and single motor mount nut under the crossmember.

I think it was well worth the 10 bucks in steel and electricity!
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Old 07-16-2012, 04:52 AM   #15
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Anybody actually have the MSI mounts? feedback?
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Old 07-16-2012, 11:25 AM   #16
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I filled in all the " gaps " in my stock 04 STi mounts........much more stable, no more rocky shifter or sorry ass launches lol wasnt ready for the solid mounts yet as i still drive this thing everywhere
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Old 07-16-2012, 11:26 AM   #17
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^^^O yeah lol forgot to say i used 3m poly windo weld ( liquid polyurathane) Works soooo nice just messy as hell
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Old 07-16-2012, 02:45 PM   #18
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Tigwerks engine mounts are another option to look into. Here's a link to my review.

http://forums.nasioc.com/forums/show....php?t=2266729
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Old 07-16-2012, 03:09 PM   #19
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Ive had two sets of Group N's they are nice but break when i launch the car. Running solid cusco ones now and only feedback is i can hear the vibration of the 150k miles on the drivetrain now...... so if you dont care about a little whine... then go for it
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Old 07-17-2012, 02:21 AM   #20
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what durom is the cusco?
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Old 07-17-2012, 02:37 AM   #21
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I have the MSI mounts in my track car. It doesnt run (yet) so no idea how well they work, but a great piece. Lowers the motor a few mm and fit well.
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Old 07-17-2012, 03:08 AM   #22
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Quote:
Originally Posted by btrenhol View Post
I have the MSI mounts in my track car. It doesnt run (yet) so no idea how well they work, but a great piece. Lowers the motor a few mm and fit well.
thats good to know they fit well
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Old 07-17-2012, 07:56 AM   #23
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Quote:
Originally Posted by SoCal_Scooby View Post
what durom is the cusco?
This is your answer:
Quote:
Originally Posted by Bamofo
Running solid cusco ones now
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Old 07-17-2012, 03:16 PM   #24
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Cusco doesn't make a solid mount. They are softer than beatrush. I started my car last night with the MSI mounts didn't feel any harder than the beatrush
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Old 07-18-2012, 07:51 AM   #25
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Quote:
Originally Posted by scby rex View Post
Cusco doesn't make a solid mount. They are softer than beatrush. I started my car last night with the MSI mounts didn't feel any harder than the beatrush
Maybe, but these sure look solid. Zoom in on the picture and take a closer look http://www.rallysportdirect.com/Cusc...rce=GoogleBase
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