New B-MAX 4 III

[skyaflake]

I've driven the car yesterday for the first time. It was adopting to 4WD, since I drive 2WD mainly.

I read on several forums that the inner hinge pins were prone to breaking. So I took in some spares from my old B-Max4 II kit - actually I took the whole front assembly with me -.

First heat (after 1 minute): first front inner hinge pin broken. So I swapped it to the old one. Second heat was more a moment for me to adapt to 4WD driving. Car was very smooth and easy to drive. Easier than the previous one. In the third heat I broke the other front hinge pin. So I've swapped that one also. After the swap I changed some things in the default setups to see how the car would react on changes. I kept driving and driving. Really great stuff. Enjoyed it.

And on my last heat I broke (after a slight touch(!)) a rear inner hinge pin. So I swapped out both when I came home.

Hinge pins feel weaker than the old ones. I will try the "new" ones again soon. But at the moment I'll stick to my current setup. People didn't know what car it was . Some drivers liked to car by it's looks.

Note: I'm a average driver, I don't hit things often. It's no complain about the hinge pins. Just something I've noticed. Jörn Neumann was at the track yesterday and I'm far slower than him so that's where I'm at

Today I have to build up the 2WD for next weekend, a indoor race. But I will drive the 4WD soon again. It's so much fun.

[mes]

Breaking inner hinge pins? No big issue, probably overhardened in the first series of kits. As I got new diff outdrives for my first series B-Max2 before I even ran the car, I am sure they'll fix it very soon.

[discothesnake]

Originally Posted by mes

Breaking inner hinge pins? No big issue, probably overhardened in the first series of kits. As I got new diff outdrives for my first series B-Max2 before I even ran the car, I am sure they'll fix it very soon.

It's a big issue if it ruins your race! I haven't run mine yet but I will be looking out for this. If there is a genuine problem with these he whinge pins hope yokomo do the decent thing and supply us with replacements.

It's something I never broke on the old car is i will make sure I have spares.

[bombman]

Hi Guys,
do you know the exact measurements of these hinge pins?
3x47mm or 3x48mm?
Thanks
Guy

[dpackster1980]

Ran mine for the first time. It had a lot of understeer but by the end of the day it was spot on after a few tweaks. One of the major changes was removing the centre weight and running the cells forward. I used no1 pistons in the back shocks from the beginning of the build as having smaller holes in the rear makes no sense.

So far I'm well impressed.

[dpackster1980]

Cracked a front shock tower too but that's because of a silly jump (the worst jump in the world).

I was concerned about the hinge pins after hearing about people braking them but after the pounding it took off the jump (again the worst jump ever built in the whole of mankind) I think it could be a bad batch because I should have broken one easily.

[tyreman]

Does anyone know the internal ratio of the car??

[450kid]

First run out today. Car felt good just need more track time struggled with steering a bit. Was on polished wood floor dropped diffs to 7k front 5k rear made a huge difference. Am going to drop front to 6k next time out.

Broke front hinge pin too. My mate did a hinge pin aswell as cracking front shock tower.

Looking forward to next time out with it. Overall car was good just need to sort hinge pins and get more track time to adjust set-up.

[neallewis]

is it possible to double up on the front shock towers?

[450kid]

Yes I would if thought it is possible. Neil do you know anyone that will stock 3mm titanium round bar so I could make some hinge pins?
cheers
Ben

[gainsy]

Anyone got a link to the online manual?

[Jamesy]

Originally Posted by tyreman

Does anyone know the internal ratio of the car??

40/17 = 2.3529

[Arn0]

Originally Posted by gainsy

Anyone got a link to the online manual?

Not yet

Originally Posted by tyreman

Does anyone know the internal ratio of the car??

2.35 as mentioned on the setup sheet
Speaking of setup sheet, a better quality editable was done, available on petit for anyone looking of it.

[skyaflake]

Originally Posted by Arn0

Not yet


2.35 as mentioned on the setup sheet
Speaking of setup sheet, a better quality editable was done, available on petit for anyone looking of it.

Thanks

Originally Posted by neallewis

is it possible to double up on the front shock towers?

Yes. But, why? The tower is 3.6MM thick if I remember correctly. If there are some durability issues with the towers there will be people stepping up and creating thicker ones

[dikke hond]

Originally Posted by skyaflake

If there are some durability issues with the towers there will be people stepping up and creating thicker ones

Let me guess?

[corkyjohnson75]

Originally Posted by dpackster1980

Cracked a front shock tower too but that's because of a silly jump (the worst jump in the world).

I was concerned about the hinge pins after hearing about people braking them but after the pounding it took off the jump (again the worst jump ever built in the whole of mankind) I think it could be a bad batch because I should have broken one easily.

It was also the worst track in the world to .

[dpackster1980]

Originally Posted by corkyjohnson75

It was also the worst track in the world to .

Car was excellent by the end of the day though. Get one bought.

[dpackster1980]

Originally Posted by 450kid

First run out today. Car felt good just need more track time struggled with steering a bit. Was on polished wood floor dropped diffs to 7k front 5k rear made a huge difference. Am going to drop front to 6k next time out.

Broke front hinge pin too. My mate did a hinge pin aswell as cracking front shock tower.

Looking forward to next time out with it. Overall car was good just need to sort hinge pins and get more track time to adjust set-up.

I ran 7k front and 3k rear. Took the weight out of the back and ran the cells forward which helped improve steering. I moved the linked inboard on the front hub and moved the ball studs forwad on the steering link. The balance was perfect.

You'll always brake a shock tower because of the rigidity of the gearbox casing and the tower. At least it's not a dnf which is worse.

Hinge pins are on my shopping list when they are back in stock.

[dpackster1980]

Originally Posted by mes

Breaking inner hinge pins? No big issue, probably overhardened in the first series of kits. As I got new diff outdrives for my first series B-Max2 before I even ran the car, I am sure they'll fix it very soon.

If anyone does break a hinge pin and is stuck then the XB4 front hinge pins look bang on. Luckily I had a fellow racers car in my house he's selling and checked the length against the manual.

[Steven Forster]

Originally Posted by dpackster1980

If anyone does break a hinge pin and is stuck then the XB4 front hinge pins look bang on. Luckily I had a fellow racers car in my house he's selling and checked the length against the manual.

So you have a few spares then pack ha ha