Midnight

iTrader: (19)

What do you think? What are the pro's and con's of running solid motor mounts?

ZONES89RS

iTrader: (25)

Dont know yet, i bought a set for my 89, but it wont be using them till the new motor is built.

I know a solid trans mount is not good, between vibration and DT shock, the solid trans mount can be bad.

brandoz28

iTrader: (3)

you're gonna want to use a rubber or poly trans mount with them or you'll tear up transmission cases with any kind of power.

kenSS

iTrader: (1)

i have them on my 86 camaro. your motor will not rock anymore. mine use to shake like crazy. solid motor mounts made it not rock much anymore, you will feel the vibrations more in the drivers seat. i have a poly trans mount. so far so good.

Midnight

iTrader: (19)

Yeah I'll be matching it up with a poly trans mount. Im looking forward to the new setup once the motors done.

slow95z

iTrader: (33)

you'll need both motor and tranny mounts solid to keep from busting the tranny case cause if one is permenantly mounted and the other can shift, then the only weak point left is the bellhousing. i would go poly/poly on them. it will keep vibrations down and still keep the everything where it shift instead of break.

STREETRODZ1

I have run solid motor mounts on many of my cars and love them, the vibration is not bad at all, and they help put the power to the ground. Run the poly trans mount though, in most cases the companies that sell solid motor mounts will suggest you run a poly trans mount. The only time i run a solid trans mount is if i am running a motor plate. You will like them, they will keep that motor in place and put more power to the wheels.

irocz2173

For a street car, there is no need to run a solid mount. As previously stated, Never run a solid mount on a street car. I have had great luck with poly mounts. Vibrations are minimal and the torque rocking is greatly minimized.

dgcustomz

iTrader: (127)

NEVER??? LOL! I run solid mounts on both my fbods and love it. I hate it when people are worried about the small things. RUN EM AND RUN EM HARD!
I gOt a better reaction time strong pulls on the street and strip. Overall the best type of mounts I have used. I have SPOHN solid mounts on my 99' SS A4 and on my 01'Z28 M6. You wont regret it and you will never look back at the poly engine mounts and rubber engine mounts.... BUT DO INSTALL POLY TRANSMISSION MOUNTS!!!! A MUST!!!!!

irocz2173

I meant "never run a solid tranny mount"

Midnight

iTrader: (19)

Yeah I have a poly trans mount in the there already from when I put the 700R4 in.

maxgee

iTrader: (5)

i have poly engine mounts and had a poly tranny mount, too much vibration coming thru the car.
i want to now run one solid mount and keep the rubber tranny mount. the reason i want to run one solid mount, is so i can have space to run my downpipe over my crossmember.

do think i will have a problem running one solid motor mount and keeping my rubber tranny mount?

7.0 camaro

i use solid mounts for the fact the car reacts quicker at the track. helps reaction time.

SD99TA214

iTrader: (27)

I went to solid and ill NEVER go back. car is SO much tighter! poly tranny mount and 1.6 60ft's

mrdragster1970

.

Ran solid mounts on the street for years & years. It's a hot rod.
I doubt the difference will be that hard to deal with.
They last forever & there is less slop when hammering it.

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.

I use the solid lenco mount on the fast car as the limiter. Only because it has zero flex.
On the slow car I still use a poly trans mount. Never had a problem street or track.

.

Midnight

iTrader: (19)

Cool guys, I can't wait to swap in the new mounts!

cambirdracing

iTrader: (4)

NEVER run a solid tranny mount unless you have a tubular chassis and a 2 motor plates, 1 in the front and a midmount.

Sarg

iTrader: (6)

Old thread I know, but I did have a question. If using solid engine mounts and a poly transmission mount, wouldn't that allow movement by the trans but not the engine and cause problems with the bellhousing or case of the trans? Shooting for the 800 hp range and wanted to make sure my bases were covered. Would poly/poly be better or solid engine/poly trans or solid/solid?

kpeterson

I typically run solid motor mounts and a poly trans mount on iron block cars and one solid motor mount and poly mounts for the pass side and trans on aluminum engine cars. I think most people forget that a typical chassis can flex quite a bit. The iron block can function as a stressed member to some extent and be OK. I believe a lot of problems are from the chassis stressing the drivetrain not just big HP trying to twist the drivetrain. I’m not sure what HP makes a motor plate a good idea. Today’s street cars are way past the point where old timers used to say it was needed.

ls13ater

iTrader: (3)

There okay as long as you don't drive on the road a lot, I hate the way they feel at idle