Intlcutlass Posted May 5, 2005 Report Share Posted May 5, 2005 Everyone is talking about ways to lower. Has anyone on here swapped a lower spring rate outta a Lumina... Take Shawns ride as an example: I think he started with a RMD (RPO) spring..... If you swapped in a RPO code RDH or lower... I would think that would equal at least 1.25 to 1.5 inches... maybe more. You could probably pick one up for $20 at a boneyard, and it's still a fiberglass spring vs the metal Birchmount ... you know it will fit. Has anyone gone that route? Just Curious.... Quote Link to comment Share on other sites More sharing options...
GnatGoSplat Posted May 5, 2005 Report Share Posted May 5, 2005 I thought about going that route, but GM's spring chart is actually pretty screwed. Some springs they claim have a higher load rate than others, yet they're softer, lower, and tend to sag more than some that are listed as having a lower spring rate. So pretty much, I don't trust GM's chart. My 89 with FAF spring and KYB struts is not any lower than the 94 is with stock spring and stock struts. The FAF spring is a waste of money, and I'll keep saying that until George Smolen decides to make one even lower. Quote Link to comment Share on other sites More sharing options...
Intlcutlass Posted May 5, 2005 Author Report Share Posted May 5, 2005 I thought about going that route, but GM's spring chart is actually pretty screwed. Some springs they claim have a higher load rate than others, yet they're softer, lower, and tend to sag more than some that are listed as having a lower spring rate. So pretty much, I don't trust GM's chart. My 89 with FAF spring and KYB struts is not any lower than the 94 is with stock spring and stock struts. The FAF spring is a waste of money, and I'll keep saying that until George Smolen decides to make one even lower. Your 89 with FAF and KYB's or Koni's? (you Koni stealer!!) J/k, I wish I scored those :worship: I was just curious about that.... I mean looking at some of those Lumina springs , it seams like an obvious option... So your saying that a lower stance Lumi , would ride crappy? Quote Link to comment Share on other sites More sharing options...
GnatGoSplat Posted May 5, 2005 Report Share Posted May 5, 2005 KYB's for now! I'm not in too much of a hurry to get the Koni's in until I have the car back on the road. I don't know if it would ride crappy, but just that GM's chart says some springs have a higher load rate, yet the same springs are saggy and softer than some really stiff springs that have 4x4 height. Quote Link to comment Share on other sites More sharing options...
5speedz34 Posted May 7, 2005 Report Share Posted May 7, 2005 Is the Birchmount spring heavier than stock, if so by how much? Quote Link to comment Share on other sites More sharing options...
GnatGoSplat Posted May 7, 2005 Report Share Posted May 7, 2005 Birchmount is 27lbs and stock is 8lbs, so 19lbs difference. Quote Link to comment Share on other sites More sharing options...
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