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Originally Posted by OkieSnuffBox
This was Swift vs Megan, how is that relevant to Hyperco and Eibach?
Look at all high end coilovers, Penske/JRZ/MCS/AST, etc. All Eibach or Hyperco.
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See this section at the bottom (bold mine):
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I just started recording the numbers to show you the difference between the Swift spring and Megans. but I have tested almost every single spring out there. Even the most popular spring company like eibach is off the rate by at least 25lbs.
I've tested everything from Eibach (race springs), Vogtland, Tanabe, Tein. The only company that comes close to the swift springs in accuracy was a company called Hipercoil which was off by 15lbs. But then again had a bunch of coils like the Megan spring.
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Quote:
Originally Posted by OkieSnuffBox
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All that says is that Indy cars all use Eibach or Hypercos - and even then I'm sure those aren't remotely comparable to what we'd put under our cars. Swift may not even make springs of that variety. I want to be careful not to blanket-dismiss or praise a spring manufacturer based on a product I won't be using (Indy car springs). Either way, thanks for the input.
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Originally Posted by strat61caster
I'd be happy with any of the main three, Eibach, Hyperco, Swift.
Swift is relatively new, I was using Eibach and Hyperco 10 years ago. Arguing between the three is pretty silly, if you care you'll compare all three on the relevant specs and the choice will become obvious they are all accurate enough unless you are prepared to invest in measuring each spring you get yourself (been there, done that). I've got Eibach on my car now and a pair of Hyperco's on the way, Swift doesn't make the spring I need right now but I'll probably try them in the future.
That thread from NAM is very old, and his data isn't very precise but it proves what low end springs give up for a price point and what you get spending the extra money. You can set up your own spring tester with a bathroom scale, some weights, spring clamps, calipers, and a bit of diligence and understanding that you're ghetto setup is going to have inconsistent data, but it would be enough to prove that your two 7k springs are actually 7k and not 6.5k and 7.3k, if you've got a press of some sort (drill press, hydraulic press, a shock dyno will do the trick as well as a big ol' vice) and a high capacity scale or load sensor all the better.
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You're right - first posted in 2008, last edited in 2010. I suppose spring manufacturing has changed a significant amount since then.
Well, for now, my personal verdict is we don't really have any idea.