Quote:
Originally Posted by andoiwebb
We've shortened the rear arms to and also run the ball diff, we've also drilled a new inner hole in the rear wishbone for the lower shock mount - this helped a lot on very low grip tracks, though the shocks / springs need to be stiffer to stop the rear collapsing. Some of our astro tracks have nitro buggies running on them as well as 1/10th. These are ice rinks in the wet!
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As mentioned we ran the series last year against the rear motor B5's, 22's, RB6's and B-MAX2's on both 1/10 and 1/8 blown out dirt tracks as well as the usual astro and hard packed dirt tracks…..both in the wet and the dry.
9 out of 10 of the XB4 2WD I help out are all set up too soft.
The biggest culprit is usually running the front way too soft.
How much have you shortened the rear arms ?
Are you running the ball diff with carbide or stock ceramic balls ?
Have you glued the diff rings ?
What tires are you running in the front compared to the rear.
On astro we have usually ran the normal profile staggers to have a bigger tire that don't dig in as easily (front grip has never been a problem).
Converting to a shorty setup will also help in terms of being able to add back the saved weight to the rear of the car.
Running other lighter parts in aluminum and titanium as well as a low profile servo will also help in that respect by lowering the overall weight and being able to add it back where it helps more.
But remember the XB4 2WD will never be able to compete with a rear motor in terms of mechanical grip due to the rotation of the motor and drivetrain.
Bent