Greetings. Was checking the flyingbrickperformance website. Looked at the three suspension packages they sell. They seem to be well thought out packages. I singled out the IE stage three springs and liked that they give a good drop in height and yet are streetable according to FBP's description. Looking at the front spring, it appears to be wound in the progressive style. Nice feature. Question? Do I mount the spring with the tighter coils up or down and why? I have seen both ways. Maybe this is a tech topic that should have its own thread?
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I honestly have no idea, but I dunno if this would help but personally, I would just mount them with the writing right side up. IE wrote the part number on them so I'd just do that so it's right side up. No idea about which side should actually be right side up and why tho, hope that helped some -
I just installed them writing right way up. Shouldn't make a difference provided both sides are done the same way. Good choice in springs, I love my set.Comment
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I'm thinking what I need to understand is if the car is going into the ground or if the ground is coming up into the car. I'll e-mail IE to see what they say. Gonna say that the tighter coils are up.Comment
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E-mail sent. Did some searching on other forums. Same question was asked. IE stated that it does not matter. I can't yet believe that. My, dumb arse, opinion is that the tighter coils are installed up. My thinking is that as Mr. Gravity is pulling down on the car, the high spots in the road are trying to lift the car away from the earth. So the lower side of the spring rate enables the moving suspension parts to lightly soak up the bumps and , A, make the ride more comfy, and B, when the time comes for the serious side of the spring rate to do its thing, the spring (progresses) at the rate it was rated for. Once again, my opinion. I wouldn't be surprised though, if indeed it does not matter. There must be books about designing suspensions. I have an older one that deals with drag racing. I'll start there.Comment
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The car moves. If the ground moves, lay off the acid for a while.Originally posted by regis101
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Mount the springs with the writing facing up, that's part of the reason it's there. I can't say enough good things about the IE's, I have them in my car, and they're fucking great.Comment
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Thanks for the reply. Progressive springs are a great way to go for the best of both worlds.Comment
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Jammed around on the net. Found a Ford Bronco site and a UK site that shows their springs installed with the tighter coils up. Intrax had an interseting picture on their site that has tighter placed coils on top and bottom with the middle coils being farther apart. In the end it prolly doesn't matter. And so on...Comment
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Every "lowering spring" set for E30's is progressive, only the coil over setups available are linear.Comment
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I agree. At least as to what I've read on the vendors sites. IIRC, the race type springs can be had with one rate. 89 325isComment
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It doesn't matter which side of the spring is up. You could install both sides differently and it wouldn't make a difference. The same force will be transferred through the entire spring no matter how it's oriented. It doens't matter whether the force is from the car dropping onto the wheels or the wheels pushing up on the car going over a bump.
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I was stating that as a fact, I've never seen a set of linear lowering springs that don't come with adjustable perches.Originally posted by regis101Comment
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i have a set of linear lowering springs that don't come with adjustable perches...I'll let you guys guess for a while to try and figure out what they are. I'll give you a tip, they are no longer available.Comment
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