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Old 10-14-2014, 05:46 AM
  #5140  
nv529
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Originally Posted by big greg
Nick Vasquez and I have been doing some heavy testing. (More him) but we realized it's very easy to drill the 2 hole pistons to big. It took me 3 tries to get it right, a pilot hole with a number 55 is a must. And be very careful when drilling final hole, it's amazing the difference in the car when the holes are just slightly big. I was able to drop 5 wt in each end and it lands way better and is way more stable
I cannot stress this enough! The plastic is really soft I went through 2 piston sets until I got it right. The first time I drilled the rear pistons with a #51 the hole over sized enough to fit a #50 bit (.070"/1.78mm)

I'd recommend using this method

#55 or #56 pilot hole
Front: Drill with #53, check hole with 1/16" drill. If it doesn't fit drill with 1/16" bit
Rear: Drill with #52, check hole with #51 drill. If it doesn't fit drill with #51 bit.
Take your time the holes should fit snug against the drill bit when the size is correct.

Just a FYI: I've checked my drills with a .0001" micrometer 1/16" measured .0623"/1.582mm, #51 measured .0667"/1.694mm




Originally Posted by Wildcat1971
I am not so sure about your shock package. I talked to a couple local sponsored HB drivers and they say Ty's shock package is way too soft. they are running the 2 hole with like 47/42 oils.
After resolving my drill bit issue, I started off with 40/35w x 2 holes. The car was really stable until landing big jumps or flat landing it had a nasty uncontrollable bounce. I thought it didn't have enough pack so I went up oils until reaching 50/40w, by then the car drove the worst ever due to the shocks hydrolocking/over packing which was causing the bounce. So I went to 30/25w it was "springy", but 100x better. With my drill pistons 32.5-35wfront and 27.5-30w rear seems to be the sweet spot.


Here's a crappy webcam video with 35/27.5wt. When dropped from 10-12" the buggy uses about 70-80% of travel, full compression is slightly below ride height then rebounds to ride height, the car never bottoms out.

http://www.youtube.com/watch?v=vn_vpSCGGmI
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