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Old 02-21-2015, 07:01 PM   #331
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The MBX7R Eco does use 70mm front springs. Same as the nitro. The front shock length was not changed with the R, only the rear length.
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Old 02-21-2015, 10:11 PM   #332
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The MBX7R Eco does use 70mm front springs. Same as the nitro. The front shock length was not changed with the R, only the rear length.
So you have not built both new R cars because you would not be saying that .... the Eco springs that come in the Kit is part number E0573 75mm 7.75T comes straight from the kit bag detail page and on the Nitro R car they come with part number E2516 70mm 9.25 and that comes from the nitro kit bag detail .....


so i will ask my question again
why does the eco R come with 75mm springs when the nitro R car comes with 70mm
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Old 02-21-2015, 10:30 PM   #333
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Not sure why that is. I have not built the 7R Eco yet. I was getting my answer from the mugenracing parts listings. All the springs for the front Eco R and nitro R are the same length according to the site.
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Old 02-21-2015, 10:33 PM   #334
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Yeah i don't know ether my 7's that i had before I got these both ran 70mm so it makes me wonder why 75mm on e buggy
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Old 02-22-2015, 06:37 AM   #335
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He is right the eco comes with the 75 springs. From what I understand it's the weight of the eco and for ride height. You can use the 70 springs if you want. You will have to adjust the spring more to get the ride height
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Old 02-22-2015, 08:24 AM   #336
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Anyone have any suggestions on settings for a Tekin RX8 Gen 2 with 1900 combo and gearing suggestions as well as i am just getting back into rc racing with the MBX7R eco!
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Old 02-22-2015, 10:42 AM   #337
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Anyone have any suggestions on settings for a Tekin RX8 Gen 2 with 1900 combo and gearing suggestions as well as i am just getting back into rc racing with the MBX7R eco!
Hideeho
My setup is an rx8g2 w/ SMC 1900kv
Boost/timing - Blinky, no boost (multipolar motors don't like boost, more heat than help)
Cl - depends on traction & skill, I usually set mine @ 70% for my local track (not a lot of either for me )
Min throttle - 2-10 depending on motor (just enough to make it move)
Min brake - min
Expo - to your taste (I don't like expo, changes the feel to much for me, easier to change in the tx any way)
Gearing - depends on the track, I usually run on a small track (95'x55') geared 14/46, when I go outside to the next closest track (200'x100') I go way up on pinion, 18/46. Eventually I want to try 17/44 outside, maybe a little more torque with the same top end(?).
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Old 02-22-2015, 11:22 AM   #338
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thanks it's a starting point for me though
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Old 02-22-2015, 02:13 PM   #339
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If the hole is to lube the bearings they should have put it between them and not where the bearing race sits. Plus you would have to run the bearings with no inner shields to get them lubricated.
When you use cvas from the 7 or the six (which is when those holes got put in) the hole is between the bearings.
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Old 02-22-2015, 02:40 PM   #340
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When you use cvas from the 7 or the six (which is when those holes got put in) the hole is between the bearings.
Yah I just switched over to mbx6 hubs and cvas and noticed that. You would think they would move the hole inward on the 7 hubs so it's not blocked.
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Old 02-22-2015, 04:16 PM   #341
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Yah I just switched over to mbx6 hubs and cvas and noticed that. You would think they would move the hole inward on the 7 hubs so it's not blocked.
Hideeho
Other than moving the hole, why would you run x6 hubs & cva's on an x7 or especially x7r (instead of u joints)?
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Old 02-22-2015, 05:11 PM   #342
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Hideeho
Other than moving the hole, why would you run x6 hubs & cva's on an x7 or especially x7r (instead of u joints)?
Currently we're running indoors on a tight track and I'm looking for more steering. The 7r eco front uprights are trailing which helps stability but hurts steering. I wanted to go to the inline uprights but they don't work with the universals. So i had to go to cvas when using the inline parts. When we go outdoors I'll be switching back to 7r parts.
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Old 02-22-2015, 09:29 PM   #343
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As per the attached photo of the rear upright shaft...is that normal to have a big space between the upright and the shaft nut?
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The official Mugen MBX7R Eco thread!-rear-upright-shaft.jpg  
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Old 02-23-2015, 12:06 AM   #344
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As per the attached photo of the rear upright shaft...is that normal to have a big space between the upright and the shaft nut?
That's how mine looks too.
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Old 02-23-2015, 05:45 AM   #345
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That's how mine looks too.
Thanks rcgod!
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