My HS build

[Jason@SportsCar]

Originally Posted by CoryM

Hey guys. This is probably a useless post as few will run HS, but in case it helps anyone (I'm also sitting around, bored after surgery) here is my setup:

-09 5dr
-205/50R15 NT01
-15" Mini Imola rims
-Rear TRD bar
-Front Tanabe bar
-Tokico blue struts shocks.
-Tire pressures 46/36psi (could lower a hair if you didn't care about edge-wear)
-harness lap-belt
-everything else is OEM

Balance is good but you must get the weight onto the front to prevent understeer. It is the most critical part of driving this car, maybe tied with being early enough to let the soft springs settle. So long as as you get the weight to the front, the car will turn in, just hint at understeer, then immediately (and controllable) rotate.

At this point, I think the car is as done as it's going to get for HS in autoX. The next steps would be spending more $$$ than is practical for the car. Hoosiers, lighter rims, and Tokico Reds (or customs). I can't justify that for this car. I might see some improvement from pads/braided lines, but they are enough for autoX (barely... another 10kph faster and I'd need to upgrade).

And yes, I know I'd be more competitive in STF. However I get NT01s cheap, and HS keeps me from spending $$$ on the Yaris (and lets me spend it on my faster car ). In terms of making the car faster while ignoring classes, springs would be step 1. Most of what I do (the parts and driving style) is to try to compensate for the soft springs.

As is, this setup has let me PAX 3rd or 4th a couple times in a VERY competitive area (admittedly on courses that were perfect for a Yaris, or when few fast drivers showed up). I probably PAX an average of ~20th of 80+ drivers which isn't bad for this little car with a meathead behind the wheel.

Cheers.
Cory

The NT01 is a brick, try a 195 Bridgestone RE71R - much better fit on those skinny wheels.

Also ditch the bigger front bar, all you are doing is increasing understeer. A 2014-15 hollow front bar would be a much better choice.

[invader166]

Originally Posted by Jason@SportsCar

Also ditch the bigger front bar, all you are doing is increasing understeer. A 2014-15 hollow front bar would be a much better choice.

I guess that makes sense. After all, reducing front stiffness increases front tire contact. You just have to get used to the increased body roll though...

[ilikerice]

Originally Posted by invader166

I guess that makes sense. After all, reducing front stiffness increases front tire contact. You just have to get used to the increased body roll though...

That upper sway bar isn't really doing anything that you actually feel on FWD cars because the subframe cradle Is soo stiff already. Most of your understeer come from being front heavy and designed from the factory to be more understeer happy

[Jason@SportsCar]

Originally Posted by invader166

I guess that makes sense. After all, reducing front stiffness increases front tire contact. You just have to get used to the increased body roll though...

Its not like I am telling him to remove his front bar (while using OE springs), its a small change in roll stiffness that helps keep the inside front tire in contact with the road - lts less of a change than he already made putting that big front bar on there.