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My custom solid upper motor mounts...


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Posted

Here's a pic of one, the other is on the car already...

 

feb16004.jpg

 

With just the one on there, the vibration/noise isn't really bad at all, not even noticeable at most times. I'll see how bad it gets once I mount this one, though.

 

Basically had to cut out replicas out of styrofoam, pack them in sand, cast them, and then mill them to size on my dad's Bridgeport mill, and drill and polish them. ( I didn't want the ends to be polished, only the sides and top...if you are wondering why they are duller )

 

Did everything myself at my dad's shop on my days off...what do ya think?

 

Pics of them mounted when the freezing rain thunderstorm blows over... :lol:

Posted

Sweet!!! Look really good, I gotta give ya props on that! How long did that take you to do?

 

 

With two of em in there, your car is gonna shake itself apart :lol: mines doing that and I only have the poly bushings!

Posted

I tried to make some that were out of billet aluminum and had Nova Poly Leafspring bushings in them.....vibrated like crazy....i made it a half a mile down the road before i had to turn around and go home.....

 

gave me a headache.

Posted

Took me about 5 or so hours for the both of them, divided over the past week or so. Making the castings took the longest and was the hardest. Rest was pretty elementary.

Posted

Sounds like it was a good little project then.

 

 

 

AWeb80, even my FFP's are like that....sometimes

Posted
I tried to make some that were out of billet aluminum and had Nova Poly Leafspring bushings in them.....vibrated like crazy....i made it a half a mile down the road before i had to turn around and go home.....

 

gave me a headache.

 

Yeah I dont know how bad it will be. I'm hoping that since I have one of the smoother running 3100s out there it wont be terrible, but if it is I can just leave the one mounted and use the stock dogbone on the other side, because I know that doesn't vibrate too bad. Maybe use the other one for race only...

Posted

My car was a rattle can when the FFPs were first put in, but it has since calmed down to near nothing.

Posted

Okay, I got them both in now...I think it looks really badass, but anyways, heres the shocker: NO rattles, and barely any vibration. And I've got the videos to prove it...I'll upload em later. I'm pleasantly surprised. As far as performance, the roads are too shitty right now to go over 3/4 throttle, but it seems a bit more responsive.

 

feb16008.jpg

 

8)

Posted

About 2lbs a piece. Only a little heavier than the stockers.

 

Not bad for a couple BIG chunks of solid aluminum, but I am considering milling slots in them to ditch some weight. Not for awhile though, and it doesn't really even matter...

Posted
Wow zack that looks awesome!

 

 

 

I thought about it, wouldn't it be smarter to put some kind of bushing there, even if it just a little bit. Since the vibration may wear the metal a lot faster?

Posted

Those look really nice.

 

I'm taking it that a 3.1 mpfi might be too vibration prone to enjoy these mounts?

Posted

Looks awesome!

 

I'm taking it that a 3.1 mpfi might be too vibration prone to enjoy these mounts?

Actually, being inherently balanced, the 3.1 is a very smooth running engine. However, any engine produces some vibration, so I too am curious how it feels from behing the wheel.

Posted

i should get pics of the ones i made....the vibrated the cabin horribly....and my 3100 is smooth too.....:shrug:

Posted

cabin vibration is going to be the worst. Mines horrible.....

 

But well let him give us the full report on that one!

Posted

Thanks for the complements and whatnot.

 

My dad has a little shop with a manual mill, lathe, drill press, arc welder and a crucible furnace among other little things. He rebuilds lawnmowers, snowblowers and other things with small engines and has to make a lot of off beat parts for them. I sometimes come in and help him out if he needs it.

 

These engine mounts are made from 3 melted down Tecumseh HM80 blocks if anyone's curious. :lol:

 

As far as stress on the mounts, I am not worried at all. The castings came out real clean, they are over 2" wide, and the 3100 is a little smoother then maybe some of you give credit for. Maybe sometime I'll put poly bushings in, but I think they are fine the way they are.

 

As I said before, the vibration is nearly non-existant. I have no rattles at all, and the only time I feel any shaking through the steering wheel is when stopped in drive, because this car idles so low. Maybe going from a stock 3100 to one with these, it would be more noticeable, but considering I'm running a straight pipe off the resonator, no intake resonator, and a cone filter ( only sometimes ), I'm a little more immune to a little extra vibration/noise. And I like it. I cant stand driving a car I cant hear and feel a little bit.

 

I think over anything else, these have made the engine louder in the cabin. But it isn't bad at all. I will post the vids tommarow, and you can be the judges. :wink:

 

Sorry for the drawn out post; I had a lot of bases to cover. :lol:

Posted

Maybe I'm missing something on the vibration thing or the TGPs don't rattle as much? I have FFP mounts, FFP UDP, and a built engine and my cars runs/drives extremely smooth, no vibrations at all? :think:

 

Those mounts do look very nice though. Should have used new bolts/washers with them though, they would look even better :wink:

  • 4 weeks later...
Posted

What alloy is it? Just some cheap stuff or did you get your hands on some 6000 series to keep them light?

Posted

looks pretty sweet, zack

 

i'm wondering how hard the bolts are for the mounts. just seems like maybe you shuold get grade 10 maybe if you're not at least going to put some kind of poly sleeve on the bolts or something :shrug:

 

oh, and when you feel like making them again, i call dibs on a set :lol:

Posted

Whoa...bump.

 

The factory bolts are metric 10.9, so they are plenty strong. Haven't bent even a little yet.

 

But actually, I am working on some small bushings, because they have developed a slight rattle as of late.

 

The mounts are made of melted lawnmower engines. Came out really smooth, and no heavier than the ugly stock steel ones.

 

As for making another set. No. :lol:

Posted

:bawl:

 

oh, and i didn't even realize this thread was that old until you said bump :lol:

Posted

You're probably going to see those holes get bigger in a hurry then... that's going to be some really soft metal. If you want them to be totally rigid, use brass for the bushings. mcmaster-carr has it in rods if you don't have ready access to it. Turn the brass to a .005 or so interference fit and freeze it, heat gun the motor mount, and drop it in. Works great for getting bearings into custom aluminum wheel uprights.

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