Solid motor mounts?

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jonnydart440

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So does anyone run solid motor mounts? I remember back in highschool that was the "thing to do", well at least I knew of a few kids that did it and everyone wanted to do it. And thinking of how tight a fit these engines are in these cars and how we are always fighting with clearance issues with headers and manifold especially when the engine is torqued and even putting limiting straps on their engines to stop them from rattling the exhaust, it just made me think about solid motor mounts? So does anyone use em or is that old school or just causes too much vibration or something?
 
i run spool mounts

weld a nut on the inside

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then bolt the strap to the mount, weld the strap to the k frame

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"Poor Boy Solid Mount"
 
I used them back in the 1970's on my bracket racer (pictured). They were sold by Ed of "For 340's Only". I never experienced any vibration and it was good to know my clutch linkage was not being tweaked by engine torque. I would use them on all of my cars if I could. Bought a clean '85 Olds Cutlass Sierra once for a rock bottom price because the previous owner said the transmission was going out. During my test drive, the car had a terrible vibration. I bought it anyway and when I got it home I found that the transmission was fine, just one of the flimsy rubber motor mounts had given up.
 

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I put some on my 72 satellite with a 440, i much prefer a solid mount, course a motor plate is always better :) that's what's going on the next motor build for that car after I'm done with my 67 dart
 
if you do install solid mounts , install a solid trans mount too. 2 hard points and a rubber are going to crack something later.
 
the mopar performance book states the if you use a solid trans mount the trans will break. I do use a poly trans mount with an engine plate and it never broke. the trans has to move around just a just to soak up vibration.
 
I had a friend build me some solid motor mounts for my 340 Swinger back in the early '70s. I never had any objectionable vibration. Of course, the engine was internally balanced by an extremely reputable machine shop.
Oh yeah, and I ran a rubber trans mount for the 727 back then and never experienced any breakage - both street and strip driving with a reverse pattern manual shift trans and 4.89:1 rear gears.
Yeah, it was quick. Wish I still had it.
 
the mopar performance book states the if you use a solid trans mount the trans will break. I do use a poly trans mount with an engine plate and it never broke. the trans has to move around just a just to soak up vibration.

X2
The chassis WILL twist, especially on a stock chassied car.
 
Just drill the driver's side biscuit mount and run a bolt through it. Easy peazy. Still allows a little bit of dampening, but doesn't move around enough to make rattles. Tons of ways to skin this cat for sure.
 
Ya, I was just curious. I'm surprised I don't hear about it more. I just didn't know if there was anything detrimental to running solid mounts.
 
Yeah, ever since the poly mounts came out they kinda give the best of both worlds.
 
If you can go with spool mounts IMO. Having used both styles I really like the spool mounts.
 
I have homemade solid mounts with a 3/16" piece of rubber between the mount and the K-frame to dampen it just a little.

I`ve run motor plates on 2 of the last 3 cars I`ve built, still have yet to have any vibration problems. 600 horse 406 sbc, and currant 505" wedge.
 
I run solid on the driver side and rubber on the pass and trans.
 
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