well i like my setup alot over stock but i still feel like the car wants to roll out of high speed turns a little and is still not great at high speed stability.. I have 18's with kdw2 tires, progress rear sway, ingalls rear trunk brace, and trd springs.. Is there anything i can do to further stop roll and make handling better.. Im not sure i want hotchkis sways for my tc, cus its already kinda of rough but theres gotta be more out there?? any ideas

 

coilovers, LSD, lightweight wheels, hotchkis front and rear sway bars, polyurethane bushings, front and rear strut bars, and gut out your car!

thats all i can think of right now

 

oh yeah, and our cars will never truly be stable at high speeds because were aerodynamically challenged

 

I know you don't want Hotchkis, but I can't really think of any other company that offers a front sway bar for the tC.

Also, I didn see where you mentioned having a front strut tower brace. Greddy makes an awsome one.

I haven't really looked yet, but I am sure you can get a polyurethane bushing kit for your suspension as well. I have seen it for a lot of other cars, but I never looked into getting one.

Another bolt on i've heard good things about is the Megan racing C-pillar brace. I think it goes inside the cabin on the top between the towers beside the seats. Above the seatbelts or something. Long story short, I have heard it really reduces body roll.

If money isn't an issue, you can pick up some Tokico struts, or whatever performance brand you like. Thats really all I have right now, but I will probably think of something else before too long.

 

heavy duty struts and more aggressive alignment, energy suspension bushings, kaminari CF roof,

but trust me on this, the hotchkis front way bar makes a HUGE difference, i went from stock, to TRD rear sway bar, to hotchkis, and i was amazed at how much better the car felt with the front sway bar on was much firmer then the stock and the trd rear sway bar.

lastly, i don't think it is the car that is making you feel the roll, maybe it is just the seat, maybe putting in a racing bucket seat would make you feel more secure in how the car is handling.

 

Best setup for just about any condition on a front wheel drive should look a little something like this... Soft front suspension, stif rear, and stiff sway bars... The soft shocks will help keep the front tires in contact with the ground during weight transfers front to back and side to side on the front wheels... The rear shocks should be stif to help reduce the amount of weight transfer... Keep a front sway bar that is stiffer then the rear will cause massive push (under steer) so the rear should be much stiffer then the front especially in the tc... I think if u just upgrade the rear sway bar and go to a good quality spring and adjustable shock you should be fine... If you are going for time attack, this will only be the start... U would still have to consider stiffening the chassis with a roll cage, roll bars, and get rid of the all the top weight of the car (sunroof, trunk, and hood should all be cf) ... If you need suggestions on parts, let me know and I will supply venders and part #s for you.

 

BTW didnt see that you already had the progress rear sway bar... What setting do you have it on?

 

seriously dude... you should be fine on corners.

 

What's unfortunate, is that you're already near the point of diminishing returns... as in, you'll need to spend a fair amount of dough to get any better.

Or... diminishing returns in that you'll need to consider sacrificing usability.

1) You don't have shocks mentioned. Get something with adjustable dampening. This is a big step, and can cost you a bunch, but it's well worth it. Some might tell you coilovers, which are also just fine, as long as you don't slam it.

2) Front strut tower bar MAY help slightly. There are a number of different subjective opinions on this one, and not much in terms of objective evidence. I don't think it can hurt much... what's a few more ounces?

3) Bushings will make a very big difference... yet, you've got to have some time to install them, and you'll notice a big increase in chassis rattle and harshness (depending on which you choose to install, lots of them)

4) KDW's are pretty good tires.... but not nearly as good as R-comps. How deep are your pockets? Tires are the #1 way to make HUGE handling gains. Look into the RE-01R and its competitors.

5) LSD - awesome upgrade, awesomely high price.

6) Any form of weight reduction will help.

7) C-pillar bar may help. Megan makes one.
-------------

etc. etc.

 

yep, i'm pretty much in agreement with everything that was said

1) adjustable shocks - tokico is coming out with HTS adjustable shocks for the tc soon (late this year / early next year)

https://www.scionlife.com/forums/viewtopic.php?t=236502

so you may wanna wait for those - definitely will be worth the $$

2) Megan C-Pillar - hell, can't hurt. anything you can do to stiffen up the rear.

3) hotchkis front & rear sway - i know you were against this (i don't run hotchkis sway in my car but rode in one that has) but those bars (front and rear) feel awesome

4) LSD of course for obvious reasons

5) weight reduction - cf roof/hood/hatch, gut interior, etc. for obvious reasons

these should be good enough to help the car feel more stiff

 

Thanks for all the info guys.. I think ill get trd struts and dc front strut bar soon.. What will the struts do for handling, and if ride smoother or harsher with it and will it take some bouncyness outta the car on highway.. Also i see you said the scion has bad aerodynamics.. So theres no ways to make it stable at high speeds.. that suks.. well keep em coming and thanks guys...

 

OO and also my system box is like 115 lbs.. LOL ima try and get a custom fiberglass sytem box made and shave like 75 of those punds outta the trunk..

 

Poor aerodynamics along with a front heavy car make it nearly impossible to make the car handle properly at high speeds unless you build the car around the suspension... IMO the system should be the last thing on your mind if you want the car to handle... Get the car weighed in each corner... Try to take out as much weight as u can... then see where you stand with weight distribution front to rear and side to side... I usually try to get the car balanced front to back (which aids in heavy braking and also contributes to under or over steer), Then get some coilovers to balance out the side to side... Usually the weight will be distributed to balance out opposite corners ie: drivers front and passangers rear will match and so on...

 

coil overs are mad dough tho huh.. ( gotta pay to play lol) Well id be doing the systme over cus it would loose 75 or so lbs in the trunk.. lol I dunno thanks for givin me knowledge guys..

 

just get rid of your system, if handling is really that important to you, you would

just upgrade all ur interior speakers and you will be happy!

 

You might want to try upgrading your rear subframe bushings. I posted about them in another thread, if you want to know more;
https://www.scionlife.com/forums/vie...715450#3715450

 

bushing are cheap, but installation is either a PITA or expensive if you have somebody else do it. so that is also mad money.

 

No, not for the rear subframe bushings, cost and install are both moderate. If we were talking about replacing ALL the bushings, then I'd agree with you.

 

i wish i had handling so i could autocross

 

You could fill your chassis with polyurethane foam