thisguy2849

iTrader: (4)

Depends on the size of the track. On a large track I run the 2 piece top deck and an 80 spur. Ratio at around 2.6

casrcr

iTrader: (2)

Also depends on open 21.5 or USGT Spec motor.

thisguy2849

iTrader: (4)

I only run the spec motor so didn’t think about that

casrcr

iTrader: (2)

👍👍

blanks596

iTrader: (20)

What brand 64p spur gears work with this car?

Techno Duck

iTrader: (5)

Axon DTS or TCS V2 work.

trigger

iTrader: (15)

RW TC spur gears work great and have virtually zero runout.

casrcr

iTrader: (2)

My 2 Center Flex chassis plates showed up this morning along with 2 of Bob’s fan mounts, all BEAUTIFUL work!! Time to get to work.😎Thank you Bob. Chris S.

KE4PJO

I don't know what #'s are on an Awesomatix. What roll center numbers are you looking for? Give me an example...

trigger

iTrader: (15)

Mtc2 axle height is much lower than the amx(@ the hubs). So there is much less mechanical grip with the Mugen, hence the lower roll centers compared to amx. In order to match the amx, the mugen would need to raise the lower pivot up about 3-4mm(approx).

h2e

So why not do that, if it's possible only by shimming?

trigger

iTrader: (15)

Not needed. We can replicate amx roll centers but amx can’t replicate mtc2. For example, the amx hubs will not allow them to lower axle height. So in order to take away mechanical grip, the amx has to raise roll centers. The Mtc2 and amx are similar but not the same so running the same roll centers won’t benefit the mugen since the damper package among other things are different.

BobW

iTrader: (1)

I spent a fair amount of time testing high roll centers on the MTC2 earlier in the year. It's all summarized on the RC Crew Chief FB page. The best Setup I came up with shown below. Never tested with the Camber gain values mentioned but I would expect it to be a handful with higher camber gain numbers.

The axle height for the A800MMX is 14.7mm with the AM06WL steering blocks so a 2.2mm shim under the hub will get you the same axle height if that is where you want to go. I think you will find the AMX drivers are back to running lower Roll Centers. In my testing I found high RC much harder to drive as it makes the car more responsive, to responsive for me.

h2e

Thanks BobW for your insights. How do you rate the two parameters camber gain and RC height relative to each other?
How has your car held up during testing? Has it maintained its setup well after (light) taps? Or do you hardly ever touch boards? Could anyone else talk of setup consistency
Side note: Interestingly on my own design car, the RC close to the ground wasn't causing an overly reactive driving behaviour. maybe because other effects cause too much understeer (thinking of kingpin inclination).

glennhl

iTrader: (16)

I must not be understanding what you are explaining. Doesn't the center of the wheel determine the center of the axle in the hub? So aren't all axle heights 1/2 the tire diameter? So shouldn't the AMX and MTC2 have 32mm to the center of the axle at the hub? Maybe you meant the outdrives are lower, the part the axle cv joint plugs into on the spool or diff.

EDIT: I'm thinking you mean the axle height at the hub to where the bottom A arm connects. But as far as roll centers, more roll doesn't necesarly mean more mechanical grip. More roll compared to the other end means the end that rolls more carries less of the overall weight transfer and therefore has more grip. However, if I change the front and rear an equal amount, it won't change.