Revilo

Besides the DC Sports Header, WR intake, and exhaust system... what else can I change to improve my tC performance?

Thrawn

Header, intake, and exhaust system (from the header back) are pretty much the standard bolt-on performance mods. Short of boost, your next options are piggy-back ECUs, lightened flywheel (possibly mated to a performance clutch), possibly head work, short throw shifter, and an upgraded valve train. Those combination of items (if done properly) would give you a quicker revving engine, increased rev-limit, shorter shifts, removed speed limiter, a little more power across the entire power-band, better top-end, and a more precise feeling clutch. This is assuming you've already added some more aggressive pads, SS brake lines, stiffer suspension components, and switched all of your fluids over to synthetic. On your quest for power, please don’t forget about the other important performance and safety components. Oh! And don’t forget, some better treads and lighter wheels will do wonders for virtually every aspect of performance. So, tires are probably your best bet as your next mod. Our stock rims are pretty light for factory 17", at about 18 - 20 lbs per. Finding a (nice looking) 10 - 15 lbs rim is probably going to be difficult, and very costly. Speaking of light rims, if someone knows any w/ the right offset, please provide links.

Mr_Superman

also, if you do start to get some more power out of the motor you should def look to lower the car and maybe get a body kit to help reduce the amount of air traveling under the car. way too scary to be racing and feel like the car is lifting up.

Revilo

OK, THANKS... I'LL GO FOR THE TIRES AND THEN FOR THE BODY KIT

Thrawn

A body kit? Unless the kit is aerodynamically tested it will not likely help w/ performance as much as suspension components, and, if anything, will simply add weight. For that $900, you could get the TRD springs, struts, and rear sway bar with an extra $350 you could put towards brake pads and SS lines.

Revilo

what about the air traveling under the car?

Thrawn

That's not likely to be a problem at the speeds one will be traveling at. The tC is electronically limited to 127 MPH, and seems to be quite stable (aerodynamically wise) at that speed. Some better tires, and upgraded suspension components (which will lower the car) will make the car even more stable at that speed, an increase performance across the board in other areas. If you want stability at higher speeds, suspension and tires will likely take you much further then an aero kit for the time being. Not to mention the money saved could be put towards brake upgrades, to help bring you down from those high speeds.

Revilo

ok, the optional wheels for the tC (super 7 from enkei) with the Pirelli tires, could be better?

Revilo

When you change the springs, you need to change the shocks too?

Thrawn

Yeah, you could go for Super 7's, I believe they're the same weight as the stock rims, even though they’re 18”s. However, I would just go with a set of Pirelli P-Zero Nero M/S 225/45/17 and have them mounted on the stock rims. That would save quite a bit of cash, and you would see all of the performance benefits. As for the suspension, no, you don’t have to do the shocks when you do the springs, but you're best off too. The stiffer and shorter springs could wear out the stock shocks sooner then normal. Although, according to TRD, their springs have been designed and tested to be fully compatible w/ the stock shocks. But, if you do them all at once, you’ll save quite a bit of time (or money if have them installled for you).