jaredperry Posted May 17, 2015 Report Share Posted May 17, 2015 I have searched and have yet to find anything. Do they exist? Do I need to make my own? Thanks, Quote Link to comment
MicroMachinery Posted May 17, 2015 Report Share Posted May 17, 2015 Why would you want solid engine mounts? Don't Datsuns rattle enough as it is? 2 Quote Link to comment
q-tip Posted May 17, 2015 Report Share Posted May 17, 2015 I never heard of anyone making solid engine mounts, making your own is the only option. Quote Link to comment
r0p0doe Posted May 17, 2015 Report Share Posted May 17, 2015 Why would you want solid engine mounts? Don't Datsuns rattle enough as it is? X2... what's the reason you want them. Quote Link to comment
Lockleaf Posted May 17, 2015 Report Share Posted May 17, 2015 And for what chassis and engine? Regardless of why you want them no one could answer the question because you didn't tell us the application. Yes they are made for a variety of applications, but no they aren't made for datsuns. Make your own Quote Link to comment
datzenmike Posted May 17, 2015 Report Share Posted May 17, 2015 If you mean the rubber part they are also known as isolators. Without rubber all engine vibration is transmitted to the frame, sub-frame and the body. Anything loose or movable will start to hum or rattle. No advantage what ever on a street car. Quote Link to comment
Stoffregen Motorsports Posted May 17, 2015 Report Share Posted May 17, 2015 Advantage on a street car...hmmm? You could tell your friends you have solid motor mounts. That's the only advantage I know of. In a race car, diffferent story. It's funny how many times I've watched people turn their cars into "race cars" by building in race car attibutes. Only when it's too late do they realize "this sucks". 3 Quote Link to comment
EricJB Posted May 18, 2015 Report Share Posted May 18, 2015 Hope you have a good dentist. They are miserable on the street. 2 Quote Link to comment
MikeRL411 Posted May 18, 2015 Report Share Posted May 18, 2015 The only semi-sane implementation of solid engine mounts that I would believe would be on a very well built straight six, the most inherently vibration free engine configuration thanks to the physics of rotating masses ! Quote Link to comment
Stoffregen Motorsports Posted May 18, 2015 Report Share Posted May 18, 2015 Even then, there's still harmonic vibrations. Quote Link to comment
datsunfreak Posted May 18, 2015 Report Share Posted May 18, 2015 I have searched and have yet to find anything. Because no one has been crazy enough to try it. ^_^ Do they exist? Do I need to make my own? No. Yes. There are a few companies out there that make urethane motor mounts. Probably the best compromise. Quote Link to comment
MikeRL411 Posted May 18, 2015 Report Share Posted May 18, 2015 Even then, there's still harmonic vibrations. Not on a straight six! The mathematics of rotation even out just as they predict the second mode rotation imbalance of the 4 cylinder engine. Quote Link to comment
Mattndew76 Posted May 18, 2015 Report Share Posted May 18, 2015 I have been contemplating doing some billet ones with Chevy rubber control arm bushings like what CUSCO makes. Only for my 1200. kinda like these but Alluminum Quote Link to comment
datzenmike Posted May 18, 2015 Report Share Posted May 18, 2015 I have searched and have yet to find anything. Do they exist? Do I need to make my own? Thanks, For a dime? Not likely Probably make your own. Should you run solid mounts? Not on a street car for all the reasons above. What would solid mounting of the engine accomplish? If the engine isn't restrained it would just spin around trying to turn the wheels against the pavement. Just like torquing a head bolt, you have to brace your feet. Solid mounts would totally restrict any engine movement from engine torque. Under severe horsepower or repeated clutch dumps with severe drive line shocks, the rubber isolators could tear out, but not right away. This would be something perhaps only experienced in extreme drag racing or to a lesser degree, track racing. An easier fix would be a 'torque strap' which could be as simple as a length of chain bolted between the block and the body on the left side. The chain could have some slight slack in it and the rubber isolators still used for smooth and quiet vibration free running but there under hard acceleration. Solid mounting could be used for racing where vibration and discomforts are expected and tolerated for the length of a race. Driving around down town? Forget it. Quote Link to comment
Stoffregen Motorsports Posted May 18, 2015 Report Share Posted May 18, 2015 Lots of auto manufacturers build torque rods into their design. MG is the oldest one I can think of. They have been around for years. Not a bad idea Mike, but I would retro fit an off the shelf torque rod, before I would use a chain. (I'll let this count for one time today Mike) Quote Link to comment
Mattndew76 Posted May 18, 2015 Report Share Posted May 18, 2015 Still using rubber is a good idea. Still gives added rigidity but wont transfer tons of vibration. Why not just apply a good damper design like on a steering damper for cafe bikes? Quote Link to comment
datsunfreak Posted May 19, 2015 Report Share Posted May 19, 2015 Why not just apply a good damper design like on a steering damper for cafe bikes? Seen this on lots of late model cars. Quote Link to comment
datson4life Posted May 19, 2015 Report Share Posted May 19, 2015 I bought a ka 521 with solid aluminum mounts, u can have them.......blowing diffs left and right Quote Link to comment
jaredperry Posted May 20, 2015 Author Report Share Posted May 20, 2015 Reason being is that with the CA18DET I am running in the car, the mounts appear to be suffering from either the weight, or the from the flogging that the car receives. I am assuming that even an upgraded urethane isolator would be beneficial, but again, I am unable to locate a reputable manufacturer. Quote Link to comment
Stoffregen Motorsports Posted May 20, 2015 Report Share Posted May 20, 2015 So you're willing to fabricate something? If you want to make a pair of motor mounts, use urethane bushings. I buy generic bushings for things like motor mounts, panhard bars, suspension links, body mounts, etc from these guys: https://www.suspension.com/4-bar.htm. You can shop by dimensions. If you are going to build urethane motor mounts, I would still use as large a bushing as will fit in the area. 1 Quote Link to comment
datsunfreak Posted May 21, 2015 Report Share Posted May 21, 2015 I am assuming that even an upgraded urethane isolator would be beneficial, but again, I am unable to locate a reputable manufacturer. I got mine from MadDat. About 1/3 the way down the page here: http://maddat.com.au/1200.php Quote Link to comment
datsunfreak Posted May 21, 2015 Report Share Posted May 21, 2015 Also heard of people using these... :rofl: But honestly, almost anything beats solid mounting... Quote Link to comment
q-tip Posted May 21, 2015 Report Share Posted May 21, 2015 And skateboard wheels. 1 Quote Link to comment
Stoffregen Motorsports Posted May 21, 2015 Report Share Posted May 21, 2015 Motor mounts shoul dbe in shear, so that if the rubber (or urethane) breaks, the engine is still held in place. Stock motor mounts aren't always this way, but they do usually have a lip on them that will help. These motor mounts are in shear and use bushings I sourced in the link I provided earlier. Quote Link to comment
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.