I am working on turning a SRX into a VTA car.. the biggest challenge is to get it geared for more top speed, the max Tamiya gears (64/29) are not going to cut it.. I got the TJR parts gear cover delete kit and the Yeah Racing adjustable motor mount.. that way I can get it geared much higher, so at least it can keep up on the straights.. next I’ll have to work on corner speed.. the SRX needs anti roll bars and droop stops.. for me the tinkering is part of the fun.. but out of the box.. the SRX is not going to do well at either VTA or USGT..

I ran a fully loaded type S in VTA. It’s fantastic and super competitive.

In USGT, if you’re in sportsman’s it will do very well. If you grow to be in the mix with experts, then you will need to move up to a better chassis

Check out this link/article about a TT-02S kit that was built before the SRX that was using the 419 suspension upgrade and sway bars. Everything on this kit is Tamiya and would be eligible to race in some TCS classes...

https://www.thercracer.com/2020/03/u...02-type-s.html

There are several aftermarket droop stop options that will work with the SRX kit such as this one made by Yeah Racing...

https://www.yeahracing.com/yeah-raci...t-033-00106030

In TCS you would be able to run it in GT2 or GT1, but you will be racing against fully decked out TAxx/TBxx and TRF cars.. not saying you can’t.. but you are bringing a knife to a gunfight..

Thank you for the tip on the SRX droop stops, just ordered a set!

Dunno.. I enjoy running my SRX+ in VTA.. but I wouldn’t call it super competitive.. on a good day I am at least a couple laps behind TQ.. that said.. at our track VTA with the new Gravity tires are running times that are very close to USGT.. maybe my problem is that we have too many fast drivers out here 😎

Sorry Bud
Raman is right on the money

In GT2 last year at nationals, the 2nd place guy was running an SRX. He thought it would be legal for GT pro spec but since it wasn't, he entered GT2. I was amazed at the pace of it honestly. If he had a proper TA07, heck...even a TA05, I think he could have beaten me easily. He was a great driver.

Did you switch to 64p gears for more gearing options?

Yes - that’s the idea, problem is that the gear cover also keeps the driveshaft bearing in place.. and the big pinions you end up running rub on the gear cover.. that’s why I ended up using the gear cover delete kit.. it is plenty fast at this point, but it leans a lot in the corners.. the droop stops should help with that.. it’s getting there..

The leaning may not be the fastest, but it’s sure darn fun and cool looking to cut up the carpet like that.

I have a tto2r that I was running at a very large competitive race with some of the best drivers in our state I qualified in fifth place and finished in fourth place the car was as fast as everyone else the only downside was I wasn't able to adjust by droop the way I needed to to make the car as reactive as I needed it to be speed wise I was on Pace with everyone I just couldn't keep rebuilding the shocks and putting spacers in them between the runs as the grip levels changed the key to getting this car to run competitively is getting the gearing right you will need a 69 tooth spur gear with a 63 tooth pinion in 64 pitch that is the gear ratio I was told to run on shaft drive and it worked, motor temps are fine. The downside is you have to set the motor mount in the car with one screw line it up then use a long hex driver through the back of the chassis all the way to the motor mount to tighten it then you need to pull it out tighten the bottom screw in the motor mount and the top screw put the motor mount back in the car and put both bottom screws in so it's kind of a pain in the butt but you only have to do it once if you look back in this thread you will see pictures of my car it is a green castrol tt02. And this was with the short tto2 arms I upgraded it to the 419 arms and I was getting quite a few podiums and several wins against some of the top shelf cars I used the Tamaya droop plates on the bottom of the car as they are made out of steel and put the weight as low as it can get I also ran the same chassis in usgt with quite a bit of success this car is all about setup once you get the setup right it's actually quite easy to drive fast good luck you can easily win with the SRX with the droop adjustment and the correct gearing

Finally got my GT12R dialed in and got to mess with my TT-02 tonight. I'm trying to figure out what kind of gearing works for a just for fun VTA build. This is an Arrowmax 59 pinion and a RW 68 spur (3.00 FDR). I can go slightly smaller on the pinion with the 68 too. I tried 54 and it was touching but pretty loose. The only thing stopping the motor from meshing better was this corner touching the motor where the bearing is on the chassis. A little grinding and I could fit the 54 to get a 3.27 FDR without having to change the spur. Also you can see there is quite a bit more room for a bigger pinion and/or spur to get a much lower FDR!

Getting back into R/C after 35 years or so (life happens) and there is a local track and one about 2hrs from me that has a TT02 stock class that I can run so I'm thinking of starting back with this platform (in addition to a TC4 I picked up for random fun in a class that will allow it).

Been reading what I can in this thread and elsewhere (YT etc.) trying to take a crash course on TT02 platforms and racing specs. What I would like to do is invest in decent electronics (radio etc) so I can expand to other platforms as it makes sense.

The local shop guy recommended a "Noble" for a radio that I somewhat checked out but I'm curious as to what people recommend for receiver and servo for the 02.

Sounds like only basic Tamiya hop up parts are allowed as I think locally they are following TCS rules.....so bearings etc. but nothing too "interesting".

What breakable parts should I stock up on? As I know Tamiya is 99.99999% plastic normally which means things will break.....

Am I thinking about this right?

If you're getting the Noble radio it'll come with a receiver. Servo, any basic low profile one will do.

Welcome back! Stock TT02 is a ton of fun, at our track (NORCAR Ohio) we allow ball bearings, front cvd’s and whatever body you think is cool. Full size 2S battery packs but you don’t have to use Tamiya plugs. Gearing, Motor and ESC as it comes in the box.. Flysky Noble are awesome radios, pretty sure they come with at least one receiver so you are good to start.. servo wise.. anything of a somewhat reputable brand in the $50/$60 range will do a great job.. spare parts? TT02s are pretty robust.. the occasional front and rear hub.. and the stock pinion wears pretty quickly..