Last week I received a care package from our fearless leader (Fred Medel) over at Tamiya USA. That care package included the new big bore shock sets front (Part# 54504) and rear (Part# 54505) along with nine pair of springs (Part#'s 54506, 54507 & 54508) along with a set of blank pistons (Part# 54509) to test with. Having only 2 days to prepare for the Top Gun Shootout I elected to put them on my 201 set up for the stock 17.5 class.
I started by unpacking the front shocks and building them first.
As you can see they are a straight forward build just like the kit shocks are. In both the front and rear kits you will find two pair of pistons to chose from. From previously testing various BB shocks on my TRF buggies I chose the 1.7mm x 2 hole pistons for the front and using 375cst shock fluid. I built them with no spacers leaving them full length. While building them the first thing I noticed was that the seal package seemed tight on the shock shaft. Once lubed with a little bit of shock fluid in the seal pack they slid together smooth! I also noticed while installing the piston onto the shaft that the spacer for the piston made getting the upper e-clip on a little tight. However that is chalked up to the incredibly precise fit that we expect from Tamiya/TRF shocks! (Make sure you use the spacer)
Once together, as mentioned, I used 375cst fluid in the front with the 1.7mm x 2 hole pistons. For the rear I used 300cst fluid with the 1.6mm x 2 hole pistons. My spring choice from the 2wd front pack of springs was the white pair and for the rear I chose the yellow pair. For the rear I unscrewed the shock bottom eyelets 2 full turns from fully tight. This is something I have done for my 201's to gain more droop.
As you see in the picture above Tamiya provides some spacers to allow you to tailor the clearance you need. One thing I noticed that I didn't favor was that I have been using the aluminum upper shock mounts which fit the plastic shock tops of the kit shocks like a glove. They fit the Big Bores as well but I prefer the aluminum tops of these beauties to rest on the kit plastic shock mounts. (Tamiya is also releasing an aluminum lower ball set to fit in the bottom eyelet! Part# 54503)
Well.... here they are all mounted up and ready for some serious track conditions!
The very first time out with these shocks on my 17.5 buggy I TQ'd and Won a club race event followed by the same weekend finishing second at the Top Gun Shootout!
As always if you have any questions about set ups or just need help with your Tamiya/TRF cars please feel free to contact me at firstname.lastname@example.org
Posted by: JIMMY WRIGHT 7/10