New B-MAX 4 III

[caneye]

Anyone running taper pistons in their cars?

[AfroP]

New lightweight chasis kit for the Bmax 4 III
allows use of a shorty lipo

Apparently available Mid July

http://www.redrc.net/2014/06/yokomo-...it/#more-82280

[neallewis]

Originally Posted by AfroP

New lightweight chasis kit for the Bmax 4 III
allows use of a shorty lipo

Apparently available Mid July

http://www.redrc.net/2014/06/yokomo-...it/#more-82280

http://www.teamyokomo.eu/yokomo-euro...Conversion-Kit

My carbon one is lighter, but that milling does look nice. Nice they did a revised gear case to allow the diff direction to be swapped. Saves the dremmel job.

I wonder how long before they make a new (v2) kit with this chassis included? that will be nice.

[AfroP]

Originally Posted by neallewis

http://www.teamyokomo.eu/yokomo-euro...Conversion-Kit

My carbon one is lighter, but that milling does look nice. Nice they did a revised gear case to allow the diff direction to be swapped. Saves the dremmel job.

I wonder how long before they make a new (v2) kit with this chassis included? that will be nice.

knowing Yokomo its probably already in the works

[dpackster1980]

Going off how much the worlds chassis is for the B-Max2 is I'll give it a miss and get the Arrowmax carbon chassis to save weight.

[AfroP]

Originally Posted by dpackster1980

Going off how much the worlds chassis is for the B-Max2 is I'll give it a miss and get the Arrowmax carbon chassis to save weight.

On the yoko euro site it says 90euro
So you'd be looking at around £75-£85
As your getting a full conversion set.

Doesnt seem too bad

[dpackster1980]

Arrowmax chassis ordered. Once my lipo saddles need replacing I'll look at the conversion but until then I'm not remotely interested. It looks good but running saddles with it the benefits will be minimal unless you're changing to shorties relatively soon.

[discothesnake]

I ran my modified B-max4 III at torch a coue of weeks back. I loved it. It felt sharper, more nimble and jumped better.

I think you would like it in shorty mode.

[dpackster1980]

The car seems quite sharp and easy to drive in standard layout but when driving it you can tell it's carrying an extra few pounds compared to other cars.

Despite it being on the heavy side it's still a great car.

Once I change to shorties then I'll probably get the conversion. In the meantime I'll wait and see what people's views are before taking the plunge.

[caneye]

what's the deal with the updated composite gear boxes? is it just a material change?

[neallewis]

Originally Posted by caneye

what's the deal with the updated composite gear boxes? is it just a material change?

molding updated to allow the diffs to be swapped over so the rotation can be changed for the shorty chassis.
I hope they updated the front gearbox top to strengthen it.

[J'MM'N]

Originally Posted by neallewis

molding updated to allow the diffs to be swapped over so the rotation can be changed for the shorty chassis.
I hope they updated the front gearbox top to strengthen it.

I fitted shorter bolts in the bottom holes of front mount, seems to be holding out so far.

[wylie]

Just ordered two shorty packs. Going to do the mod too the standard chassis, are there any other tips that would help, TORCH is my local track and it appears that this setup is the way forward. What shock and diff oils are you running with this setup.?

[dikke hond]

Just fitted my new Penguin body. The OEM body is to flimsy and doesn't protect the electronics imo (allready costed me a brandnew esc and almost a motor). The Penguin body is very strong and fits nicely, the only downside is that there are no window decals included.
Great price though!

[dpackster1980]

I ran the Arrowmax chassis for the first time on Sunday and what a difference it makes. It has a little more flex than standard but it generates a stupid amount of grip and because it's lighter the car is definitely more nimble.

[neallewis]

Originally Posted by dpackster1980

I ran the Arrowmax chassis for the first time on Sunday and what a difference it makes. It has a little more flex than standard but it generates a stupid amount of grip and because it's lighter the car is definitely more nimble.

How much lighter?
What did you do to your oils and springs to compensate?

My shorty carbon chassis drops the weight by 200g, and as a result the damping needs work from the full weight setup.

At this point I prefer the heavy car, but more time needed to get the lighter setup right

[dpackster1980]

Originally Posted by neallewis

How much lighter?
What did you do to your oils and springs to compensate?

My shorty carbon chassis drops the weight by 200g, and as a result the damping needs work from the full weight setup.

At this point I prefer the heavy car, but more time needed to get the lighter setup right

I just left them the same.

Front
10k diff oil
Piston No.2
450cst shock oil
Blue Associated Springs

Rear
7k diff oil
Piston No.1
400cst
Green Associated Springs

With the lighter rear end the car could rotate more under braking because of the difference in weight transfer. It jumps better too.

[neallewis]

Originally Posted by dpackster1980

I just left them the same.

Front
10k diff oil
Piston No.2
450cst shock oil
Blue Associated Springs

Rear
7k diff oil
Piston No.1
400cst
Green Associated Springs

With the lighter rear end the car could rotate more under braking because of the difference in weight transfer. It jumps better too.

That rear is quite a light spring rate. I could never get the lighter AE springs to work on the rear, they just collapsed, and the grip went awful mid corner. Car improved grip and cornering the heavier the spring. I find the Yok orange now is the best on RHR and Batley. I'm running no extra weight, and cells forwards. Car is heavy though at 1919 grams (saddles) at last regional weigh-in.

I found the light/shorty car very bouncy at the rear on the same shock setup, went to the 2x1.7 piston, 400, and then down the AE springs from grey to black springs, but it was still bouncy, but less so. I've not had chance to work on the shock piston/oil and spring setups for the lighter car. 2x1.6/400 had far too much pack for the weight of the car, even with the lightest spring, it couldn't respond quick enough. Not tried the kit pistons however.
The saddle car is working really well for me, and with big-ish meetings recently I've just wanted it to work, so kept it as it was.

I think the thicker anti-roll bars will help to run a lighter spring. I currently run the 1.6mm rear bar, but think a heavier one will help with running lighter shock springs.

I'm running currently
Front
2x1.6/600cst
Yok orange
10k
1mm anti-roll bar

Rear
2x1.7/400cst (or maybe AE32.5/388cst)
Yok orange
10k
1.6mm anti-roll bar

Indoors at York (low traction gym floor and carpet) I run Yok black or even Purple springs, much heavier which really helps with the low traction. Light springs just turn the rear end into mush and donuts.

What is your car weighing in at?

[dpackster1980]

1481g but that's without cells.

[caneye]

Does anyone use a shock tower protector? Looking for something like a shock tower bra used by the 1/8th guys.