|
rear coil overs - spring rate
OK, I have a problem.:CRY: :CRY:
Two broken drive shaft uni's, and a broken gear box - bad news:CRY: Time to rip it all apart and line up the moving parts. I have a salisbury live axle, currently using 900 lb/in coil springs and Koni adjustables. New coil overs will be verticle. The coil over springs tend to be in the 250, 350, 450 range ????? The car weighs about 1050 kg, weight is roughly 50/50, diff is unsprung so sprung weight is about 230 - 240 kg per corner. I want the car to be stiff, for sprint days. :p :p Anybody know how to calculate the correct spring weight for coil overs :confused: :confused: Snaken Well will be when I fix the shocks and get a new drive shaft and gearbox. |
I dont know how to work it out but my car (still building) is a very similar weight (less unsprung) and my kit supplier recommended 500 lb springs each corner.
|
Snaken,
Talk to King springs. (07) 55396700. They are real helpful. Phil |
Snaken
Have you already done the coil over conversion to the Homebush? I am thinking of converting mine. Brett |
Got the answers
Hi Brett,
I have found the answers. :LOL: :LOL: :LOL: Have just ordered from Summit Racing, QA1 coil over shocks ( part no. HAL DR4855B ) and 350 lb springs, mounting backets and adjustmnet tool, you can find them all at http://www.qa1.net/ Will pick them up in the US next week .........Ya Hoooo :3DSMILE: :3DSMILE: Life is good. Snaken |
These spring rates sound about right for logging trucks, but for a Cobra?
Rear springs 180 - 220 #/" (street), 220 - 240 #/" (race). Fronts are a little stiffer because the control arm acts as a lever on the spring. Load on wheel ~ 600#, load on spring ~ 900#. 350#/" for a small block, 500 #/" for a big block. |
Hi Pete,
Those QA1 col over look like a nice piece of kit. I've bought their Crome Molly rod ends in the past and they seem to be solid and well made. I was having a look at a pair of their shocks at MacDonald Bros Racing a while back. Billet alloy construction and a fairly solid looking shaft running through them. Bernie is running them on his Cobra. Did you go for spherical ends or urethane? Cheers |
Hi Mike,
I went for the spherical ends. Better for the track. The big 15 in road tryes I run at 15 to 18 lbs so that softens the ride on the road. **) **) The 12 shock adjustments will be handy for easy adjustment. Probably need to re arrange the bump stops. I got a bum steer with the old spring rates, they were more like 250 - 300 than the 900 advised. The tech people at QA1 were very helpful. Snaken |
Stiff is my middle name
:LOL: :LOL: :LOL: :LOL: :LOL:
Why didn't you contact me straight away Duncan...... The name say's it all............... |
Re: Stiff is my middle name
Quote:
Cheers |
I didn't go there, but she was kind enough to return my sunnies.:p :p
Very friendly and obliging people in Goulburn.:JEKYLHYDE If I have chosen spring rates that are too hard, the vibration could have pleasant side effects Snaken:p |
For who?:JEKYLHYDE :JEKYLHYDE
Phil |
I thought when driving a cobra a traveller was a given!!!:D
|
I did it for the Club
As a new member to the club I thought I should do i t for the team
I was pretty certain that at least one member of the group would need her help over the weekend (I certainly didn't) |
Jeez, So there is some truth to the rumor, I was just fishing. :LOL:
Good on you for taking one for the team. That's what Cobra club membership is all about.:cool: Cheers |
| All times are GMT -7. The time now is 05:19 AM. |
Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: