05TXFM

iTrader: (1)

I want to buy lowerring springs and want to compare spring rates but cant find the spring rate on all the springs, Can any one help?

I know

Front lbs/in Rear lbs/in
Stock 150 245
Hotchkis 175 285
Tein S-tech 200 340
Tein H-tech 180 310
Megan Racing 280 250

Can anyone help me with Progress, H and R, Tanabe, Goldline,
Eibach springs or any other spring out?

Correct me if I got the spring rates wrong

amdforever

Sorry, I'm a noob when it comes to springs but what exactly is spring rate? Is that how much pressure it takes for it to move? thx for clarification if anyone can provide me that :D

Deathwish238

well it's lbs per inch...so I assume 150 lbs moves the spring 1 inch? I'm not sure either

05TXFM

iTrader: (1)

yes weaponx6x its how much weight it takes to compress the spring 1 inch

Deathwish238

Cool...makes sense

ack154

iTrader: (7)

Heh... this is why I never put spring rates in the Suspension Buyer's Guide... it's a total PITA to find them.

tml057

Anyone try contacting the manufacturers? I know anytime I've had a question about my other car's aftermarket parts, the companies are very quick to respond with the information I need.

KiKaZ-tC

iTrader: (1)

I believe we have Mcphersons in the front which helps with stiffening, this is the reason why there is lower spring rate in the front compared to the rear... where we have double-wishbone so... it needs stiffer springs...

Am I correct on this?

I recently got some ground controls with 440 lb/in FRONT and 350 lb/in REAR. This is the way ground control chose the spring setup. However, seeing that the stock springs rate is lower in the front, I was thinking of switching the springs around, so it would be 350 lb/in FRONT and 440 lb/in REAR. Would this work??? I kind of like how the tC handles stock, but don't want the body roll.

Keeshwah

body roll is control (mostly) by sway bars.

JSC_Speed

You won't find published rates on Eibachs or any other "progressive" spring. Progressive springs have different diameter coils as they near the ends.

The reason you won't get rates is beacuse they vary depending on the amount of compression. This is good for a comfortable yet moderately sporty ride, but bad if you like driving on the edge. A linear spring (you can tell a linear rate spring because all of the coils are the same diameter) is constant, but a progressive spring gets stiffer the harder you push it. This makes a progressive spring unpredictable at the limit, because you have no way of knowing where that limit is.

The rates are stiffer in the front than in the rear to help control/induce understeer.

Stiffer springs don't cure body roll by them selves...they help, but stiffer anti-roll (anti-sway or just plain old sway) bars are the true solution to body roll.

Keeshwah

You can get the percentage stiffer than stock at stock height though.

Tcguy85

i thought people always complained the h-techs were to soft, but according to that the hotckis springs are softer and i've never heard anybody say hotchkis springs are to soft.

Keeshwah

hotchkis are progressive so who knows what they are when you start really leaning on them. i will tell you with 2 ppl in the back they get soft.

Tcguy85

wrong..... according to hotchkis they are linear rate springs.

from thier website on the tc's springs
Hotchkis Tuning Sport coils offer the performance you seek, and the comfortable ride you deserve. Made from cold wound silicon steel, our springs are linear rate, powder coated seabring silver and include polyurethane bump stops.

link here to the tc page http://www.hotchkis.net/products.php...roducts_id=342

and from my experience the rear with hotchkis springs and the trd rear sway is stiff enough for me. i feel a good deal of roughness on uneven bumps in the rear. it's not bad, i like the ride stiff.

KiKaZ-tC

iTrader: (1)

Wow! By the spring rate, it looks like the Hotchkis is mainly for looks and not for performance. Barely any increase in stiffness on both front and rear; I would only get springs with this low of spring rate for LOOKS!

JSC_Speed

Hotchkis are indeed linear (F: 175/ R: 285).

Keeshaw, pretty much any spring will feel "soft" with two adults in the back seat of the tC, since they are sitting on the rear axle...it probably just makes the front feel floaty, giving you the illusion of a soft rear.

Many people buy the Hotchkis springs because they will not blow out their stock dampers--like will happen with S.Techs or any other spring more than 20-30% stiffer than the OEM springs.

Before the, "My shocks are fine with S.Techs!" or the, "OMG! He said I'll blow out my shocks!" comments come in: I'm not saying this "blow out" will occur instantaneously, but too stiff of a spring will cause your dampers to prematurely fail. Another side effect of the uber-stiff spring and improperly paired dampers is a bouncy ride (check out the next slammed Integra that drives by you...jiggly).

So, the Hotchkis are a decent spring for the OEM damper, as are the H.Techs.

The S.Techs are also all about looks, just FYI. In my opinion, the H.Techs are the perfect blend of style and performance (on just about any H.tech application from Scions to Subarus).

rvpps2rocks

dude i forget my pen and paper...

rvpps2rocks

oh and btw i still love how my car rides stock and not bumpy
HOTCHKIS

Tcguy85

well i like my hotchkis springs, they feel fine to me, the car corners awesome with the springs and trd rear sway. now i just need tires, they are the weak link now. the hotchkis springs feel a little stiffer but the ride is still perfectly bearable.

Keeshwah

I just assumed they were progressive actually because they look like the pic on the trd sparks site not so much like the ones on the hotchkis site. and ya i bought them to avoid replacing my shocks and struts.