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Let's make my car handle, help a guy out in here!

8.3K views 33 replies 18 participants last post by  Blue Angel  
#1 ·
Ok after the intake/tune which made a substantial difference over stock. I still do not have my exhaust complete, but after that I'm done with the engine. It's not worth it IMO to drop more money to maybe make 200 whp. Already have H&R Race springs but this car does not handle well by any means IMO. My brothers new Volkswagen GTI handles wonderfully, really wanna be on that level at least. I mean it's an economy car so I guess I never really expected it to hug corners like a Porsche stock. But with the right set up, I think it could be

Now,
Is coil overs really my only option? What would you guys suggest doing to the suspension under $1000 to handle like a beast. I Live in the hill country so would be able to take full advantage of the twisty roads if my car didn't have soo much body roll. I mean, I thought the springs would help somewhat but they really didn't. Let's build my suspension to make it handle very well and be more of a driving experience. I did just notice there's a preorder on ISM.com for Front and rear sway bars. I feel like the car needs some bracing to really stiffen it up.

Any legitimate suggestions will be considered!
Thanks guys,
Blake
 
#2 ·
Front and rear sway bars will help. Also, some of your body roll may actually be tire sidewall compression. Try boosting your tire pressure a few PSI at a time until you find a tire pressure you like. You may discover that you overshoot the PSI and have to go back down. Experiment. Don't go above the max sidewall PSI.

Which trim level do you have. My ECO MT as very little body roll.
 
#3 ·
Better tires will help out immensely. Whatever tires you have, ditch them for some high-performance all-seasons at the low end, or full-on summer tires at the high end.
 
#5 ·
Yes, agree with all of the above. Coilovers are often a first choice because they will allow you to lower the center of gravity (and give the look most prefer) and use damper settings to stiffen your suspension. Sway bars and chassis braces will also help keep the chassis tight, especially during cornering. Stickier tires will help keep that stiffer chassis planted to the road :)
 
#6 ·
What size wheels do you have right now, and what speed rating are the tires? If they're the 16's on the LS and LT models, those need to be ditched for at least 17's, and preferably 18's. I have a set of 16" winter wheels with R speed rated snow tires on them. There's a world of difference between those and the 17" wheels with V speed rated tires that come OEM on the Eco. The snow tires are much less stable at high speeds than the OEM tires, and don't respond as well to steering inputs, even at below-freezing temperatures.

Tires really are the biggest bang for the buck regarding handling modifications. Having a fancy suspension setup is useless if the tires don't grip.

As an anecdote, I had a set of grippy all-seasons on my old Buick. They let that car handle much better than that rolling couch had any right to. Yeah the car had body roll akin to a sailboat on a very windy day. It did stick to the road like glue, though!
 
#7 ·
As an anecdote, I had a set of grippy all-seasons on my old Buick. They let that car handle much better than that rolling couch had any right to. Yeah the car had body roll akin to a sailboat on a very windy day. It did stick to the road like glue, though!
My Montana was the same way. It would roll like crazy but stuck and tracked exactly where I put it. It does take some time to get used to body roll. Even in snow, that van never unexpectedly broke traction except with Michelins. The OEM and Bridgestone tires I used on it were rock solid performers, even in snow & ice.

Tires make a huge difference. The problem is that not all tires will work on all cars. For example, a lot of people swear by Michelins, but I wouldn't put a Michelin on a Detroit designed suspension as I have had two pairs and neither gripped the road. On the other hand, my dad runs Michelin's on his BMWs and has absolutely no problems with traction and performance. From one of the other threads on tire pressure, it appears that at least one Cruze trim (other than the LS) comes with poorly matched tires that don't grip very well. I know the ECO's tires are well matched to the suspension, especially when running 40 to 45 PSI cold, thus my earlier recommendation to play with your tire pressure. Tires behave differently at different pressures.
 
#8 ·
For only $1000, I'd suggest staying clear from coilovers as a good set is easily $1,200-1,500+.

For your budget, I'd get the front & rear strut bars, rear sway, and the front sway z links from ISM. Talk to Steve about the sways, and about the shipment delay, because buying a so-so pair of coilovers is just a waste, money wise.
 
#9 ·
Spending money on firming up the suspension is a waste without good tires.

And the Firestones that come on the LS/1LT models are just garbage for handling. Good tires first, maybe a set of 17/18" rims, then suspension upgrades!
 
#10 ·
I've seen this asked a couple times, but I don't get it... My ECO M/T has next to ZERO body roll... You can feel the tires wanting to dive around a little and slide, but being LRR tires, it's kind of expected. 36-37psi is great in mine.

The thing you have to watch is, I don't know where your car sits with the "racing" springs, but the more you lower it, the more the body will want to roll, because the roll center and CoG get closer together.

Mike
 
#12 · (Edited)
I do have the stock tires on it, but they're from the lTZ wheels. Tires are Michelin Pilot ## something but Discount Tire said theyre great tires. I'm on 18" aftwrmarket wheels w/H&R springs. If I could post a pic on here I'd do it? I'm on my iPhone so maybe I'm missing where to post a pic.
 
#13 ·
any update? Do you have the Eco or LS/1LT or 2LT/LTZ? Believe they have different setups from the factory.
My 2 cents are:
i. replace the front end links (ISM/ whiteline or have a shop build you a pair), then go from there.
ii. tires (you can get ones with stiffer sidewalls/ run higher pressures- toyo proxes/ dunlop sport xxxx are what i've used on multiple cars). They have stickier rubber, which will improve grip (braking/ lateral/ maybe acceleration, if u are loosing traction). The choice depends on where you live. In the SF area, summer performance tires work pretty much all year round :)
 
#14 ·
Best $1000 you can spend to make the car corner better will be on tires. There's a lot of Michelin Pilot branded tires available so without knowing the exact model of tire I really can't draw any conclusions. For reviews and ratings, check tirerack.com.

Based off the one time I've autocrossed my Eco, I think the next logical step would be to add a rear swaybar (there is no factory rear sway bar, although the trailing arm rear suspension does have a torsion beam incorporated into the design). Only once those two things are done would I bother with springs and shocks.
 
#15 ·
Neither my 2012 LS nor my ECO seem to do much rolling, however, the ultra racing strut tower bars do make a world of difference in handling. When Boats still had his Cruze he had the upper front and lower rear on his car and we would hit off ramps where he would pull away hard, and i was pushing mine to the limit and couldn't come close to keeping up. And he was on the ECO LRR tires.



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#17 ·
If I remember correctly, Boats sold it for a truck.
 
#20 ·
There is nothing tremendously wrong with the handling on the Eco. Stickier tires will provide tons of benefit. I personally think the upper tower mounts are a waste of money since the towers are sitting on the firewall.You are dumping money on the car to make the firewall more rigid? I'm also not sold on a bolt on rear sway whtn you've got the stiffness of the axle going all the way across.

The only thing I'd really want to do is get an upgraded set of dampers. You are putting a sport or race spring on stock dampers and expecting good results. What we need is a set of Konis to be released and some good tires, and then we'd be about spot on. I reach the traction limit on the rubber way, way before the suspension starts causing any issues in vehicle control.

You will never make the car handle as well or even clos to a Golf or GTI.
 
#22 ·
Road and Track is only showing a slalom speed for the Boxter S as being 1.3 faster than the Cruze, too......so I'm not sure how worthy that publication's info really is. They also show the skidpad as a 0.06G favor on the GTI, so you can see that the tires are a huge limiting factor. Cheat and put some R Comps on there and you might have something. But put some nice summer tires on a GTI, and the same tires on a Cruze, and take both to an autocross. I would bet a substantial amount of money that the winning ticket would not be a Cruze.
 
#23 ·
The Cruze has won both the BTCC and WTCC several years in a row and is widely accepted to have the best chassis in both series. I think the Cruze and GTI would be a lot closer than you'd think if they were both prepared equally. I know what good car feels like as I track my 260Z regularly (it has been prepped for the track). Not saying the GTI isn't a great car but I think you folks aren't appreciating how good the fundamentals of this car are. Here's a vid of my Z on track

Datsun 260Z @ High Plains Raceway - YouTube
 
#24 ·
I have always had the thought Chevrolet should help build 12 cars and have a U.S race series.

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#25 ·
i was thinkin about this last night watching initial d haha.if u want it to handle coilovers with a stiffer spring rate,chassis bracing up the arse,poly bushing wherever you can get them to go,then were gonna need bigger brakes,then for some weight reduction,idd get some camber bolts and a nice steering wheel too.Thats all of what i thought could be done and wheels and tire preferably something in the 9in wide range.mmm i think im gonna take my cruze here.
 
#31 ·
They use 1.8 l motors

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#33 ·
#34 ·
To the OP:

If you already have lowering springs installed the next step to balance the car's handling will likely be a rear sway bar (I say likely because I don't know what your spring rates are).

To everyone else who doesn't know what they're talking about:

Tires increase grip (and grip-related characteristics like breakaway feel/speed) but do nothing for handling. Taking a car that handles bad and putting grippier tires on it just gives you a car that handles bad FASTER. An understeering turd will still have turd-ish understeer no matter what tires you put on it; it will just understeer at higher speeds around a given corner.

Handling it determined by the car's chasis set up: suspension/steering geometry, springs, dampers and roll bars. If you want a car to HANDLE BETTER, this is where you start. A better handling car can also have more grip on a given tire by balancing the cornering loads front to rear and keeping the tire's relationship to the ground closer to optimal.

Eibachs on my Eco improved the handling AND the grip: Quicker turn in and better front end grip due to added camber from lowering. The car still understeers at the limit, but the chassis is much quicker to react to steering inputs and the grip increase (still using the OEM LRR Eco tires) is impressive. A rear sway bar will help balance out the handling so the rear tires participate more mid-corner. The only piece of the puzzle that will be sub-par at that point will be the OEM dampers, which are a little under-damped for these springs.