Originally Posted by
AsphaltFlyer
Input needed. So we started a TT-02,01 class a few months ago. Our goal was for someone to come in, buy a kit & build with minimal expense & needed parts. We stocked all sorts of TT-02's & 01e. We allowed bearings/shocks/front cv's. We use Gravity USGT tires as spec. Everything was going smooth until a couple people burned up pinions and also noted that pinions & ratios are different kit to kit. Seems rally vs gt car.
So now the question. Do we allow open gearing & let it sort it self out? I picked up1 sec/lap with my 01 going from the kit 19t to a 22t.
I did make a huge graph showing fdr on both 02 & 01 with Tamiya spur & different pinion sizes. Seems both 02 & 01 are 2.6fd
Edit, if we allow open gearing, what is the best method to do so? Everyone already has 48p & 64p in their tool boxes but these are mod .6. Do we stock the Tamiya spur gears & pinions? Is there a way to switch to 64p? Or 48p?
I think the challenge you are running up against is that someone could show up with one of the TT-02 SRX or older RR kit and have all sorts of "hop up" advantages. I have the TT-02R as my base with the high speed gearing and I will say I can easily pass folks with the stock gearing and technically mine is just 100% kit built drivetrain.
Maybe the "most fair" way is to allow people to upgrade gearing and necessary parts to match the top tub-chassis spec and everything in between. The other idea would be to design the course so there is more of a pro/con to gearing decisions. If you have a long straight away then of course the "high speed gear sets" will be quicker apples to apples.
Just my $0.02