My likes and dislikes of the Buschur Motor mounts.
#61
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I didn't say it was a cheaper design. You have a problem don't you?
I said, "We were going to make our bushings like that too, it was a little cheaper, they would have had flat sides and been the same thickness down to the center steel bushing."
So let me explain that for you since you missed it the first time. IT WOULD HAVE BEEN CHEAPER FOR US TO HAVE OURS MADE WITH FLAT SIDES LIKE THE BUSHING PICTURED. I did not like the flat sided design and it cost US more to have our bushings built tapered like the factory bushing is.
David Buschur
www.buschurracing.com
I said, "We were going to make our bushings like that too, it was a little cheaper, they would have had flat sides and been the same thickness down to the center steel bushing."
So let me explain that for you since you missed it the first time. IT WOULD HAVE BEEN CHEAPER FOR US TO HAVE OURS MADE WITH FLAT SIDES LIKE THE BUSHING PICTURED. I did not like the flat sided design and it cost US more to have our bushings built tapered like the factory bushing is.
David Buschur
www.buschurracing.com
#62
There appears to be a significant difference between 80 and 90 durometer.
Some how these photos surely must translate into which would seem to be harder and less forgiving. To indicate that there's little difference between 80 and 90 durometer, well...
Some how these photos surely must translate into which would seem to be harder and less forgiving. To indicate that there's little difference between 80 and 90 durometer, well...
#63
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I found that "durometer" is a broad trem used by the industry. There are 4-5 different ways to check the hardness of the material. Depending on what the material is made out of requires a differnt "test." So if the BR and Powerflex monts are made out of 2 completely different materials the durometer hardness only reflects that type of material, so anyone can assume that these are the same hardness but just different characteristics of said material.
I guess if there is someone out there with a spectrometer then they can tell us what each mount is made out of then run a test with one type of durometer tester. I think that will tell us the truth.
I work in the plastics industry and will see if we have one of these testers at our shop, then I will buy both mounts and post up the results.
I guess if there is someone out there with a spectrometer then they can tell us what each mount is made out of then run a test with one type of durometer tester. I think that will tell us the truth.
I work in the plastics industry and will see if we have one of these testers at our shop, then I will buy both mounts and post up the results.
Last edited by dryad001; Jan 25, 2006 at 12:07 PM.
#64
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Not to knock Daves product, which I think is an excellent replacement, but i think the softness of the Powerflex could be attributed to the fact that is a two piece design. I think that the single solid piece would transmit more vibrations rather than a larger, two piece design that might not transmit as much.
#65
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Originally Posted by davidbuschur
I didn't say it was a cheaper design. You have a problem don't you?
Originally Posted by davidbuschur
We were going to make our bushings like that too, it was a little cheaper, they would have had flat sides and been the same thickness down to the center steel bushing
Originally Posted by dryad001
I found that "durometer" is a broad trem used by the industry. There are 4-5 different ways to check the hardness of the material. Depending on what the material is made out of requires a differnt "test." So if the BR and Powerflex monts are made out of 2 completely different materials the durometer hardness only reflects that type of material, so anyone can assume that these are the same hardness but just different characteristics of said material.
I guess if there is someone out there with a spectrometer then they can tell us what each mount is made out of then run a test with one type of durometer tester. I think that will tell us the truth.
I work in the plastics industry and will see if we have one of these testers at our shop, then I will buy both mounts and post up the results.
I guess if there is someone out there with a spectrometer then they can tell us what each mount is made out of then run a test with one type of durometer tester. I think that will tell us the truth.
I work in the plastics industry and will see if we have one of these testers at our shop, then I will buy both mounts and post up the results.
Originally Posted by boostedwrx
Not to knock Daves product, which I think is an excellent replacement, but i think the softness of the Powerflex could be attributed to the fact that is a two piece design. I think that the single solid piece would transmit more vibrations rather than a larger, two piece design that might not transmit as much.
Last edited by TTP Engineering; Jan 25, 2006 at 06:26 PM.
#68
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Originally Posted by trinydex
mmm how do you install the powerflex ones with hand tools?
Hand tools are not required. Powerflex units come with copper lubricant which Is used around the outer edge of the mount and you press it in by hand. Put both sides in and slide in the ss thick walled center sleeve and you are done.
#69
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Originally Posted by voidhawk
TTP: Looks like I found a guy willing to buy the BR bushing from me (he's more of a drag racer than I am, so I'm sure he'll be happy), expect an order on the Powerflex one today . This should make for a good comparison of the benefits of each.
If you want to see the difference in durometer first hand go to a sporting goods store and look at rollerblade wheels, there should be some in those ranges. It is a large difference in hardness.
Skateboard wheels will all be in the 98-101a range so they don't help.
#71
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Interesting squeeze test and the 300% more pressure. You have some very effective fingers there At first I thought that was a meter in your hand when I read the 300% but realized it is just more samples hanging.
Anyway, I was only passing along the conversation I got from the manfacturer. I looked into other mounts before we made our mounts and the high performance mounts I looked into advertised at durometer of 90, this is why I chose that number when we had ours done. I have to assume that when you take the material and make a large bushing out of it and then encase it into a steel sleeve (like the motor mount) that the little flex test from above has much less bearing on how "hard" the material seems. It would be like laying your head on a nice soft pillow and then jumping off the roof onto the same pillow, wouldn't seem quite as soft at that point.
David Buschur
www.buschurracing.com
Anyway, I was only passing along the conversation I got from the manfacturer. I looked into other mounts before we made our mounts and the high performance mounts I looked into advertised at durometer of 90, this is why I chose that number when we had ours done. I have to assume that when you take the material and make a large bushing out of it and then encase it into a steel sleeve (like the motor mount) that the little flex test from above has much less bearing on how "hard" the material seems. It would be like laying your head on a nice soft pillow and then jumping off the roof onto the same pillow, wouldn't seem quite as soft at that point.
David Buschur
www.buschurracing.com
#72
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Originally Posted by davidbuschur
Interesting squeeze test and the 300% more pressure. You have some very effective fingers there At first I thought that was a meter in your hand when I read the 300% but realized it is just more samples hanging.
#73
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Originally Posted by marksae
I found that interesting too how they came up w/ that #. He must have some well calibrated hands!
At these durometers 5-10 durometer increase is quite a difference in hardness quality. I would like to add that the material is at 76* at the time of testing. Imagine a 90 durometer mount in 40*F weather yikes! New definition for "solid motor mount"
Last edited by TTP Engineering; Jan 26, 2006 at 09:50 AM.
#74
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What durometer scale are you each measuring your products at? Depending on the durometer test method the numerical value assigned to a specific hardness can varry quite a bit. You both need to figure out what scale you're each going on. (A, B, C, D, DO, M, O, OO, CF)
FYI 20D is harder than 90OO.
Once that's figured out, you'll be able to make a better comparison.
- Steve
FYI 20D is harder than 90OO.
Once that's figured out, you'll be able to make a better comparison.
- Steve
Last edited by SuperHatch; Jan 26, 2006 at 11:28 AM.
#75
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Originally Posted by davidbuschur
Interesting squeeze test and the 300% more pressure. You have some very effective fingers there At first I thought that was a meter in your hand when I read the 300% but realized it is just more samples hanging.
Anyway, I was only passing along the conversation I got from the manfacturer. I looked into other mounts before we made our mounts and the high performance mounts I looked into advertised at durometer of 90, this is why I chose that number when we had ours done. I have to assume that when you take the material and make a large bushing out of it and then encase it into a steel sleeve (like the motor mount) that the little flex test from above has much less bearing on how "hard" the material seems. It would be like laying your head on a nice soft pillow and then jumping off the roof onto the same pillow, wouldn't seem quite as soft at that point.
David Buschur
www.buschurracing.com
Anyway, I was only passing along the conversation I got from the manfacturer. I looked into other mounts before we made our mounts and the high performance mounts I looked into advertised at durometer of 90, this is why I chose that number when we had ours done. I have to assume that when you take the material and make a large bushing out of it and then encase it into a steel sleeve (like the motor mount) that the little flex test from above has much less bearing on how "hard" the material seems. It would be like laying your head on a nice soft pillow and then jumping off the roof onto the same pillow, wouldn't seem quite as soft at that point.
David Buschur
www.buschurracing.com