Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com
 
Bigwormgraphix
Go Back   Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com > Technical Camaro Topics > Road Course/Track and Autocross


Reply
 
Thread Tools
Old 06-19-2018, 08:15 AM   #1
Lonewolf583
Apex Predator
 
Lonewolf583's Avatar
 
Drives: 2010 2SS/RS M6 Rally Yellow
Join Date: Jul 2013
Location: Seymour, IN
Posts: 231
Road Course Spring Rates

The next mod for this guy is moving from the Z28 kit to Motion Control Coilovers for adjustability. Will be opting for the remote 2 ways I think.

What spring rates are you all running and with what bars? Since I love NVH I think I'll get a few sets and start playing in the 650-800 lb/in up front keeping to a 80% front split, so roughly 800-1000 lb/in out back. As a reminder the motion ratio on the rears is pretty poor when compared to the McStrut up front.

Will be fitting 315-335 width slicks on all 4, currently also eyeballing the aFe/Pfadt bar set.
__________________
2010 Camaro 2SS/RS - LS3/TR6060, Paid Off \o/

Beating physics into submission since 1991.

Lonewolf583 is offline   Reply With Quote
Old 06-19-2018, 10:33 PM   #2
olblue75


 
olblue75's Avatar
 
Drives: 2010 2SS/RS
Join Date: Dec 2009
Location: Clarksville Tennesse.
Posts: 4,358
What will you do with your Z Springs?
__________________
Orange Krush II
1LE Front sway bar with DSE Links, Splitter, 3.91 Gears and Axles, 14/15 Heat extractor, shocks and struts, Suede Flat bottom Steering wheel, short throw shifter with the Pegasus rear poly shifter mount, diffuser with dual mode mufflers, ZL1 Rockers, Belly Pan and pedals, Z/28 Intake, Headers, Cats,Toe Rods and UCA Bushings, 1 piece DSS Drive Shaft, C7 Z06 Vented Piston Calipers with CTS-V Rotors, PAFDT Solid Cradle bushing, 32mm JPSS Rear Bar, and Skip Shift eliminator. ASC race spec splitter and wicker. 6th Gen M017 Wheels.
olblue75 is offline   Reply With Quote
Old 06-20-2018, 12:10 AM   #3
51LE50
 
51LE50's Avatar
 
Drives: 2015 1LE, 2SS, Bright Yellow
Join Date: Mar 2016
Location: Big Ditch, CA. The 805
Posts: 129
I'm pondering this too. High speed turn in is giving me some understeer. I've really been trying to pay attention and use a smooth turn in but it's still there and limiting. Tires could be an issue because as the day got hotter the pressures rose and the tires were slipping and I my entry speeds were coming down.
What are you looking to improve?
I've got the Z/28 suspension with full aero and running Cup 2's
51LE50 is offline   Reply With Quote
Old 06-20-2018, 08:57 AM   #4
Lonewolf583
Apex Predator
 
Lonewolf583's Avatar
 
Drives: 2010 2SS/RS M6 Rally Yellow
Join Date: Jul 2013
Location: Seymour, IN
Posts: 231
Wordy replies are wordy.

Quote:
Originally Posted by olblue75 View Post
What will you do with your Z Springs?
Sell the spring/damper and bar set on here as a kit!

Quote:
Originally Posted by 51LE50 View Post
I'm pondering this too. High speed turn in is giving me some understeer. I've really been trying to pay attention and use a smooth turn in but it's still there and limiting. Tires could be an issue because as the day got hotter the pressures rose and the tires were slipping and I my entry speeds were coming down.
What are you looking to improve?
I've got the Z/28 suspension with full aero and running Cup 2's
I feel like she needs help in the damper department, it just seems a bit unsettled after turn in and in the midcorner. With the current Z28 springs its close but I want some adjustability. Compression seems well matched to the springs, but I feel like it could use some more rate and more bar all around with the grip levels the slicks provide. I've read the Z28 springs are in the 300 fr, 550 lb/in rear range.

Back in my 3rd gen fbody days I would have said you need a 500+ lb/in front wheel rate and the biggest possible front bar you can find. (For a car running in the 3-3200 lb range on full slicks and limited aero).

The interwebs would suggest our road race S197 Mustang friends (?) near to our weight keep their mcstruts sprung at around 6-800 up front and about a quarter to a third of the front rate for the lincoln log out back. Makes sense given the increased weight/Aero loads some of those guys are running.

I figured that'd be the place to start; start playing in the similar front wheel rate range and keep the rear spring rate right around the 1.25 x front range.
__________________
2010 Camaro 2SS/RS - LS3/TR6060, Paid Off \o/

Beating physics into submission since 1991.

Lonewolf583 is offline   Reply With Quote
Old 06-20-2018, 08:33 PM   #5
51LE50
 
51LE50's Avatar
 
Drives: 2015 1LE, 2SS, Bright Yellow
Join Date: Mar 2016
Location: Big Ditch, CA. The 805
Posts: 129
At turn-in and mid corner? We're talking high speed corners I'm guessing? You're description is close to mine; at turn in the tires were making a lot of noise and I was really trying to make a smooth transition. Mid corner they made a lot of noise too but I was mostly using throttle and keeping the wheel stable. The car felt unsettled which seemed a bit odd because I wasn't making any changes with the steering wheel but the tires were talking to me. 3rd gear corners the car feels really stable.
How is it under braking? It can get twitchy but it's a heavy car I'm using Raybestos ST45/43.
I'm going to the track Saturday and I want to focus more on tire pressure. I had 32 front and 35 rear and it was less 'fun' than at 30/35. Corner entry was about 3 mph slower in the afternoon and maybe it was the track heating up and getting greasy but what role were the tires in that? I dunno.
The tire carcass didn't feel overly hot but maybe it's just a bit too much pressure. Or the track.
That spring rate seems soft but a lot depends on the geometry for an effective spring rate.
I see the Fusion of Ideas Z/28 is now running Ohlins on his car (he runs in NASA TT).
You look at the JRI setup? Pricey stuff. For that kind of money I'd put a cage in my M3 and make it a track rat instead of the 'maro.
51LE50 is offline   Reply With Quote
Old 07-11-2018, 08:19 AM   #6
Lonewolf583
Apex Predator
 
Lonewolf583's Avatar
 
Drives: 2010 2SS/RS M6 Rally Yellow
Join Date: Jul 2013
Location: Seymour, IN
Posts: 231
Sorry fell off, here. Mainly hairpins and the slower speed stuff; I've got no issue with the behavior in high speed. Straightline braking performance is fine. Been running a mixture of stoptech and gloc pads. Trailbraking it's hard to say.

I did look at the JRI setup, and quite honestly DSE have already done the work and that development could be worth the cost for me. I bought the Z28 kit for that reason. GM spent the time, and it's a brilliant package as delivered- drawbacks being no adjust-ability. That all said, I've always been a fan of MCS and am probably willing to go that seemingly less traveled route.
__________________
2010 Camaro 2SS/RS - LS3/TR6060, Paid Off \o/

Beating physics into submission since 1991.

Lonewolf583 is offline   Reply With Quote
Old 07-14-2018, 01:36 AM   #7
VR Baron
SoCal Camaro5 Race Team
 
VR Baron's Avatar
 
Drives: 2012 VR 2SS RS M6
Join Date: Mar 2010
Location: SO CAL
Posts: 13,587
I am not a road course guy, only autocross, but friends that autocross and roadcourse use 300/550 rates like I do, but set dse sways from full soft to stiff. They run jri or ridetechs and ridetechs to near stiff. Don’t know if that’s optimum but they are fast with that combo
__________________
Mods: Magnaflow 3" comp catback/Rotofab CAI/Apex Scoop/VMax T/B/ G.M. Blade Spoiler/SLP Splitter/ Forgestar cf10 wheels & Michelin Super Sport tires/JBA Shorty Headers,HiFlow cats & tune/ Ridetech coilovers And DSE swaybars /BMR cradle bushings, toe links and trailing arms/Stage 1 cam-445/430 RW HP/TQ
VR Baron is offline   Reply With Quote
 
Reply

Tags
coilovers, race, rate, road, spring

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 03:40 PM.


Powered by vBulletin® Version 3.8.9 Beta 4
Copyright ©2000 - 2018, vBulletin Solutions, Inc.