Tungsten cube placement behind rear wheels

Craigs Cruzer

Pinewood Ninja
Jan 11, 2020
35
12
8
52
MI
When adding two rows of 6 tungsten cubes behind the rear axle, is there a general consensus of how the should be positioned? I’ve seen designs where the cubes are centered as well as ones where they are offset to The dominant wheel side. I know the goal is to balance the weight fairly evenly between the rear wheels, so what are the benefits to one method versus the other? Does it just come down to preference?
 
With a 1/2" deep weight pocket behind the rear axle 2 rows of 6 behind the axle doesn't leave you much of a choice but side by side......now if front of the rear axle the weight pocket os bigger and will allow you room to stagger them to adjust weight forward towards DFW
 
Maybe this is one where a picture speaks a 1000 words... What's the preferred method of cutting the weight pocket behind the rear wheels? Offset to the DFW side or centered?

weight placement.jpg
 
I prefer my weight offset towards the DFW side.
I think it makes it easier to get my final rear wheel weights to my preference.
I also use 1/64th plywood to reinforce the rear axle wood.

But, I also only make right turns and turn all door knobs three times in a row...
 
Consistent building practices lead to consistent tuning which leads to more readily consistent cars with observable issues should one be built into a particular car. How do you build? What tooling are you using? What methods and skills do you process? Build from there.....
 
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In my experience the slight amount of weight shift that affords (if any) is maybe .01 oz on DFW. In fact, when I tried offsetting my six cubes I saw no difference in DFW weight when measuring the difference between offset and center weight BEHIND the axle.
I center mine and once those are epoxied in and dry I cut a big hole between the rear axles and place a cube there with tungsten putty also.
Once that is epoxied and dry I cut my pocket ahead of the rear axle. This prevents warping that can occur when cutting all the pockets at once.
Then, any tuning weight I need usually gets rolled like a hotdog and pressed down along the very back edge of the car on the bottom. Get it flat and spread some thin glue on it to make it slippery and the stop section won't "pull" at it.