So what would happen.... - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Rlandon87 · 11-02-2013, 09:53 AM

I'm not super familiar with suspension physics...

Factory Spring rates are around 210 FR / 400 Rear...

So what would happen if I put on 1.25 drop all around with 280 FR/ 230 Rear.

The rear is showing a significantly lower rate. What would the effects be? Bouncing in the rear like an old Cadillac?

Dyk-NO · 11-02-2013, 10:23 AM

It would actually be firmer when you use drop springs.

Rlandon87 · 11-02-2013, 11:36 AM

Firmer with half the spring rate?

Rlandon87 · 11-02-2013, 11:40 AM

I don't think you read it all lol... I know it'll be mushy... Just wasn't sure if the car would bounce extremely bad, wheel hop, sag when trunk is stuffed, have poor turn performance, or blow out shocks...

I ordered BMR 1" all over. I was only wondering about the other info because I have a set of Tuning Pro springs I got free- was going to use them but not worth it.

jgalewsk · 11-04-2013, 08:53 PM

I would assume it would bounce around like crazy, unless the dampeners can keep it from doing that... not too sure. I have a similar question about spring rates... stock vs lowering springs vs coilovers?

Stock:
165 lbs/in front
370 lbs/in rear
45% front to rear ratio

Pfadt:
210 lbs/in front
395 lbs/in rear
53% F/R ratio

BC coilovers:
448 lbs/in (8kg/mm)
560 lbs/in (10kg/mm)
80% F/R ratio

Is there any reason that the F/R ratio changes so much when moving to coilovers? ~50% to 80%?!

JacekPSUr1 · 11-13-2013, 04:31 PM

^ Subscribed for an answer

11-02-2013, 09:53 AM	#1
Rlandon87 Drives: 2013 SW LT Join Date: Oct 2013 Location: NLR, AR Posts: 76	So what would happen.... I'm not super familiar with suspension physics... Factory Spring rates are around 210 FR / 400 Rear... So what would happen if I put on 1.25 drop all around with 280 FR/ 230 Rear. The rear is showing a significantly lower rate. What would the effects be? Bouncing in the rear like an old Cadillac?

11-02-2013, 10:23 AM	#2
Dyk-NO Trust me I'm a Scientist. Drives: My wifey ;P Join Date: Jun 2010 Location: Houston, TX Posts: 1,118 View My Garage	It would actually be firmer when you use drop springs. __________________ "From ZERO to a Tire-Burning HERO!" Mods: RotoFab CAI, SW Headers, HiFlo Cats, Borla Atak Catback, Nightfury Cam, Ported Heads,Intake,TB, melling pump, Morosso Oil Separator.

11-13-2013, 04:31 PM	#6
JacekPSUr1 2013 1SS in IOM Drives: 2013 1SS Join Date: May 2012 Location: Lansdale, PA Posts: 641 View My Garage	^ Subscribed for an answer __________________

11-02-2013, 11:36 AM	#3
Rlandon87 Drives: 2013 SW LT Join Date: Oct 2013 Location: NLR, AR Posts: 76	Firmer with half the spring rate?

11-02-2013, 11:40 AM	#4
Rlandon87 Drives: 2013 SW LT Join Date: Oct 2013 Location: NLR, AR Posts: 76	I don't think you read it all lol... I know it'll be mushy... Just wasn't sure if the car would bounce extremely bad, wheel hop, sag when trunk is stuffed, have poor turn performance, or blow out shocks... I ordered BMR 1" all over. I was only wondering about the other info because I have a set of Tuning Pro springs I got free- was going to use them but not worth it.

11-04-2013, 08:53 PM	#5
jgalewsk Drives: 2013 Summit White Camaro 2SS RS 1LE Join Date: Oct 2012 Location: Lafayette, LA Posts: 278	I would assume it would bounce around like crazy, unless the dampeners can keep it from doing that... not too sure. I have a similar question about spring rates... stock vs lowering springs vs coilovers? Stock: 165 lbs/in front 370 lbs/in rear 45% front to rear ratio Pfadt: 210 lbs/in front 395 lbs/in rear 53% F/R ratio BC coilovers: 448 lbs/in (8kg/mm) 560 lbs/in (10kg/mm) 80% F/R ratio Is there any reason that the F/R ratio changes so much when moving to coilovers? ~50% to 80%?!