1LikesMugen MBX7
04-08-2013, 08:02 AM
#3586
Tech Addict
04-08-2013, 09:47 AM
#3587
I have a qestion about spring rates.
When comparing to other brands, are the newton/meter rates consistent from brand to brand? So if a mugen spring and a kyosho spring both had the same n/m rating, would they be exactly the same stiffness? Or are there other factors?
Thanks
When comparing to other brands, are the newton/meter rates consistent from brand to brand? So if a mugen spring and a kyosho spring both had the same n/m rating, would they be exactly the same stiffness? Or are there other factors?
Thanks
Although I run all Mugen, there was a time where the Blue Kyosho springs were being used on the different chassis brands. Initially, it seemed as though these springs were stiffer than any Mugen spring I had. As it turned out, they are the softest spring I have in my spare parts box.
I have most all of the silver and black springs available for the MBX7. There's chatter about the silver's being "more progressive" while the black springs were "more linear" as well as the above mentioned "newton/meter" rates.
Trying to take the guess work out of making changes, looking for predictable results from spring changes, I decided to meaure the springs for myself. And although not very scientific and NOT related to the newton/meter ratings, I was able to create some bar charts, comparing all springs to one another, regardless of silver, black, 75mm, 70mm, different brands etc.
My method for measuring was quite simple. The tools involved were a drill press and a digital scale. Scale was placed on the flat work area plate of the drill press. Position the height of the plate to accomodate the height of the spring. With the spring sitting on the scale, uncompressed, the top of the spring touched the bottom of the chuck.
I took 3 measurements for each spring:
at 1/2 inch
at 1 inch
at 1 1/2 inch
I recorded these values, entered them into Excel and produced bar graphs for both the front and rear springs.
It was interesting to see the results. Not only makes it easier to see which springs are softer or stiffer, it shows at what interval (1/2, 1 or 1 1/2 inches).
Jim
04-08-2013, 09:50 AM
#3588
Might be overkill for some, but I tend to struggle with believing some of the labeling that is used or simply feel that more info is needed.
Although I run all Mugen, there was a time where the Blue Kyosho springs were being used on the different chassis brands. Initially, it seemed as though these springs were stiffer than any Mugen spring I had. As it turned out, they are the softest spring I have in my spare parts box.
I have most all of the silver and black springs available for the MBX7. There's chatter about the silver's being "more progressive" while the black springs were "more linear" as well as the above mentioned "newton/meter" rates.
Trying to take the guess work out of making changes, looking for predictable results from spring changes, I decided to meaure the springs for myself. And although not very scientific and NOT related to the newton/meter ratings, I was able to create some bar charts, comparing all springs to one another, regardless of silver, black, 75mm, 70mm, different brands etc.
My method for measuring was quite simple. The tools involved were a drill press and a digital scale. Scale was placed on the flat work area plate of the drill press. Position the height of the plate to accomodate the height of the spring. With the spring sitting on the scale, uncompressed, the top of the spring touched the bottom of the chuck.
I took 3 measurements for each spring:
at 1/2 inch
at 1 inch
at 1 1/2 inch
I recorded these values, entered them into Excel and produced bar graphs for both the front and rear springs.
It was interesting to see the results. Not only makes it easier to see which springs are softer or stiffer, it shows at what interval (1/2, 1 or 1 1/2 inches).
Jim
Although I run all Mugen, there was a time where the Blue Kyosho springs were being used on the different chassis brands. Initially, it seemed as though these springs were stiffer than any Mugen spring I had. As it turned out, they are the softest spring I have in my spare parts box.
I have most all of the silver and black springs available for the MBX7. There's chatter about the silver's being "more progressive" while the black springs were "more linear" as well as the above mentioned "newton/meter" rates.
Trying to take the guess work out of making changes, looking for predictable results from spring changes, I decided to meaure the springs for myself. And although not very scientific and NOT related to the newton/meter ratings, I was able to create some bar charts, comparing all springs to one another, regardless of silver, black, 75mm, 70mm, different brands etc.
My method for measuring was quite simple. The tools involved were a drill press and a digital scale. Scale was placed on the flat work area plate of the drill press. Position the height of the plate to accomodate the height of the spring. With the spring sitting on the scale, uncompressed, the top of the spring touched the bottom of the chuck.
I took 3 measurements for each spring:
at 1/2 inch
at 1 inch
at 1 1/2 inch
I recorded these values, entered them into Excel and produced bar graphs for both the front and rear springs.
It was interesting to see the results. Not only makes it easier to see which springs are softer or stiffer, it shows at what interval (1/2, 1 or 1 1/2 inches).
Jim
04-08-2013, 10:39 AM
#3590
Although I run all Mugen, there was a time where the Blue Kyosho springs were being used on the different chassis brands. Initially, it seemed as though these springs were stiffer than any Mugen spring I had. As it turned out, they are the softest spring I have in my spare parts box.
Jim
Jim
04-08-2013, 11:04 AM
#3592
I drove the first race yesterday with my mbx7 the car is really great and drove awesome! I drove faster it than last year, but that's because my driving skills improved I think 
My mate switched from Mugen to Xray and he used to be faster than me, now with the mbx7 I was 1 lap ahead of him in a 15min final.
My white tank broke last week. It splitted on the seam next to the centerdiff. I was driving the semi final yesterday and after 3 laps, my tank was empty and there was nitro everywhere on my car. There was a small at the bottom of the tank. Right under the clunk. My tank was 2mm shimmed up and I shaved the tabs of the tank. So I'm quite sure it from the clunk and not from the chassis.
I bought a new tank and I hope this one will last. If not, I'll go back to the mbx6 tank. Never had a problem with it.
My mate switched from Mugen to Xray and he used to be faster than me, now with the mbx7 I was 1 lap ahead of him in a 15min final.
My white tank broke last week. It splitted on the seam next to the centerdiff. I was driving the semi final yesterday and after 3 laps, my tank was empty and there was nitro everywhere on my car. There was a small at the bottom of the tank. Right under the clunk. My tank was 2mm shimmed up and I shaved the tabs of the tank. So I'm quite sure it from the clunk and not from the chassis.
I bought a new tank and I hope this one will last. If not, I'll go back to the mbx6 tank. Never had a problem with it.
04-08-2013, 11:15 AM
#3594
Its that good.
04-08-2013, 11:25 AM
#3596
has anyone used the Buku clutch, if so does it line well with the stock Bell?? also is the flywheel far forward?
any pics?
any pics?
04-08-2013, 11:26 AM
#3597
I drove the whole winter touring car in the modified class with a 4.5T motor. This made me a better, consistent driver.
But I can't deny that I like this car very much. I like it even more than my mbx6. Wrenching is also better on this car. Except for the center diff mount. I like the 2 piece mount a lot more!
I hope I'm just the only one who had bad luck with the white tank...
But I can't deny that I like this car very much. I like it even more than my mbx6. Wrenching is also better on this car. Except for the center diff mount. I like the 2 piece mount a lot more!
I hope I'm just the only one who had bad luck with the white tank...
04-08-2013, 12:07 PM
#3599
Tech Apprentice
