My HS build

[Jason@SportsCar]

Originally Posted by CoryM

Late reply as I was moving house and having surgery.

Thanks for the input guys.

Looking at the 2016 rules, it looks like this truly was a useless post . I use the Yaris in a winter series, so up until now I was still on 2015 rules. Looks like this winter I'll just be racing for fun as I'm not doing a STF build. I run on NT01s because I get them cheap to the point I'd be stupid to run anything else. The raw grip, and resistance to heat cycling makes them a pretty good street/autoX tire IMO. Enough to forgive the low responsiveness.

Regarding the front bar at autoX, have you guys tried this exact setup? The front bar was the last change I did (after 5yrs), and definitely seems faster. I am familiar with suspension design (I have designed/built a car from scratch), and I understand that the front bar is "wrong" for a FWD. However I saw pictures of my car with only 1-2" of rubber on the drive wheel contacting when on power in corners: I figured I would try a front bar to reduce the savage body-roll. From photos it appears to have nearly doubled the amount of rubber on the road, without causing the understeer to be unmanageable. It is absolutely faster in many elements with the front bar. Slaloms, offset gates, keyhole turns. Also allows me to brake later/harder without losing the rear. Basically anything except corners on launch, and bumpy sweepers. The only place (which never happens at autoX) that the front bar shows massive understeer is trying to turn hard without transferring the weight to the front (turning without braking or lift-off). That being said, it's certainly possible that I have gone too far, and that the 2015 bar may be a better option. For my driving, I'd say the current setup is pretty solid.

On the track, or with stiffer springs, I doubt you'd want the front bar. You really need that aggressive weight transfer like you get at autoX. I'm not a track guy, so I can't say for sure, but I bet it would be worse.

Cheers.
Cory

If you are happy with it dont change it.

Body roll is not a bad thing if you have enough camber, and with the crash bolts you should be way better off camber wise than most HS cars. The softer front bar really helps mid corner rotation, and will certainly help power down with that open diff. I will take corner exit over transitional speed every time - you can pick the transitional speed back up with better shocks.