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Spohn solid motor mounts vs Prothane Poly Motor Mounts???

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Old 12-05-2004, 02:47 PM
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Default Spohn solid motor mounts vs Prothane Poly Motor Mounts???

I think the title says it all... can anyone compare the pros and cons to these setups? I'm considering both versions.

Thanks.
Old 12-05-2004, 03:04 PM
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solid motor mounts will increase the vibrations a great deal, are generally used on track-only cars. not conducive to street driving. if its your DD, or even a weekend cruiser that sees more than 100 miles a week, i'd suggest poly motor mounts. they perform well but retain functionality.
Old 12-05-2004, 03:52 PM
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Well, it's a street/strip car that barely gets driven anywhere. I put 1700 miles on it in 2004. I should probably go with the polys then, right?
Old 12-05-2004, 08:36 PM
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I put prothane mounts on my car and it made the whole car feel tighter. Best mod for the money yet. Also if you have a stick car then they will keep the stick from moving around when you get on it.
Old 12-05-2004, 08:44 PM
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Originally Posted by Full-Force
I put prothane mounts on my car and it made the whole car feel tighter. Best mod for the money yet. Also if you have a stick car then they will keep the stick from moving around when you get on it.
Did you use both motor and tranny or just motor mounts?
Old 12-05-2004, 09:25 PM
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Originally Posted by jcarroll845
Did you use both motor and tranny or just motor mounts?
keep a stock tranny mount in it if your gonna run solid motor mounts
Old 12-05-2004, 09:48 PM
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Originally Posted by ramairstyle00
keep a stock tranny mount in it if your gonna run solid motor mounts
Any particular reason why? Spohn recommends the poly mount.
Old 12-06-2004, 12:13 AM
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All solid motor mount manufacturers recommend a poly trans mount with them. I never asked any of them why before, but when started a thread here pertaining to the subject, it went up and down page one for some time w/o responses or opinions. I assumed know one here had any answers. Look at it however you'd like, but the manufacturer knows best. All this hear-say isn't really a realiable source...
Old 12-06-2004, 12:28 AM
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Originally Posted by NoseUp
All this hear-say isn't really a realiable source...
This is information I've gotten from a sponser running them. If I had read it off a cracker jack box, I wouldn't be posting it up
Old 12-06-2004, 12:39 AM
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That was in reference to the trans mount
Old 12-06-2004, 12:42 AM
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Originally Posted by NoseUp
That was in reference to the trans mount
Exxxcelllent.
Old 12-06-2004, 02:29 AM
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Originally Posted by NoseUp
All solid motor mount manufacturers recommend a poly trans mount with them.
im sure the guys who sell sold motor mounts also sell poly trans mounts

with the minimal amount the motor actually moves with poly mounts, i wouldnt see any reason to use solid mounts. many people have actually reported LESS vibration after poly mounts were installed.

i was researching this last night and i plan on doing poly mounts over the christmas break. i'll have my exhaust/trans out and they will be a bit easier to get to.

i've found many posts mentioning poly mounts as one of their best mods
Old 12-06-2004, 12:22 PM
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It sure is a great mod, especially for cammed cars. I'd rate it closer to a must for a car w/ a larger cam. I've seen engines shake pretty violently @ idle with larger cams and factory rubber mounts.
Old 12-06-2004, 12:24 PM
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Well, then it's settled. Poly it is. I'll order it tonight.

Thanks everyone for your help.

Old 12-06-2004, 03:27 PM
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I did in fact have less vibrations with poly mounts. Maybe because my stock ones were bad. Well atleast my driver side was bad IMO. When I drilled the rivets out and pulled the clamshell apart the rubber just fell out. It was supposed to be bonded to the clamshell requiring heating it to release. My passenger side had to be heated.


For the record I am still using a factory tranny mount, a new one. I may try a poly tranny mount too.
Old 12-06-2004, 03:32 PM
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Great, thanks for the info.
Old 12-07-2004, 12:59 AM
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the reason you don't put a solid tranny mount in also is---- you'll snap the bellhousing in NO TIME
Old 12-07-2004, 09:54 AM
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Originally Posted by ramairstyle00
the reason you don't put a solid tranny mount in also is---- you'll snap the bellhousing in NO TIME
Ah, thank you. That makes sense.
Old 12-08-2004, 02:02 AM
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got my prothane mounts in today! they look like really quality pieces. thunder racing had 'em at my door in less than 24 hours!
Old 12-08-2004, 07:02 AM
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Cool, let me know how they are after install.



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