Nats day four: Silver lining

Nats day four: Silver lining
We started day 4 where we left day 3…. waiting for the rain to end. Jordan Cullis was still keen to strike a deal to get my silver HPI spring. He offered to trade a Reedy Sonic 4.5 mod motor for them (crazy!) but I declined as I’d probably never use it. I asked if he’d give me a TCXX gear diff, and he bit. … And then, with nothing better to do, he and Sandy offered to make my TCX weapon (that’s correct, “weapon” is now an adjective). They tore it apart, checked my dampers (and adjusted the lengths), fixed where I’d over-tightened the damper mounting...
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Nats day three: First qualifying sessions

The qualy sessions today were plagued by bad weather and timing glitches. We managed to get just 2 runs (12 minutes driving) from 13 hours at the track. But despite the lack of track-time, I enjoyed today heaps. We were set up across from some funny dudes from Melbourne: Sandy Iavazzo, Jordan Cullis, and Oscar Piastri (11-year-old prodigy who won the Australian 13.5 titles at the age of 9!). They were all running mod, Sandy with a TC6, Jordan with a TCXX, and Oscar with an Xray. These dudes were properly fast. By the way, Sandy tells me that Jilles Groskamp now builds his shocks with a lot of rebound....
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Nats day two: Practice

Today I managed to get though my to-d0 list. I replaced my shock oil with 400 wt (from 600wt). For the job I borrowed a vacuum chamber (like this). It was awesome… I have to get one. The car was much more drivable with the softer oil. In particular, there were some bumps coming onto the front straight which always made me lofty, but now the car just dipped through them smoothly. I fitted a longer piece of antenna tube, and bent it down so it still fits under my shell. I hoped this would solve my radio glitch i had seen yesterday. Unfortunately the problem wasn’t solved, and happened a few...
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Nats day one: Practice

Hit the track today with cousin Joe and old racing mate Pete… and about 50 other people trying to find that extra bit of pace ahead of the big race this weekend. The car has had some serious work over the past week. That includes installing TRF shocks, HPI springs, carbon chassis, adding boost (all covered in other posts). I did set a personal best lap-time of 21.7s. That puts me somewhere in the mid-field right now. The really fast local guy, Michael Sherman, was doing 20.2s. Today… Speed was good. On the straight I was faster than most, but not quite as fast as Mr Sherman. Punch on the...
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17.5 boosted timing and gearing – HobbyWing Xtreme Stock

In this post, which I will edit several times over the coming weeks, I’m going to be exploring some 17.5 boosted setups: gearing, endbell timing, and ESC timing. I am going to be setting up 2 cars. Both are Sakura Zeros running Thunder Power 17.5t motors. This post covers car #1, which has a Hobbywing Xtreme Stock ESC. Car #2 is running a SpeedPassion Reventon Pro and is covered in another post. Sakuras have default internal ratios of 1.9 (= 38/20) but I’m using an optional 19-tooth center gear to change this to 2.0 (=38/19). Car 1 Car 2 Chassis Sakura Zero Sakura Zero IR 2.0 2.0 Motor...
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