Spring Rates Rundown (Stock and Aftermarket) - Page 3 - Nissan Sentra Forum - B15, B16 and B17 Sentra Forums
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post #31 of 178 Old 07-07-2005, 12:40 PM
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Nice post !

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post #32 of 178 Old 07-07-2005, 12:40 PM
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Quote:
Originally Posted by Sunburst03
lol.........i never said i knew the exact steps needed to take in order to effectively double the rates.......i just know that after talking with numerous racing teams at events i've attended as well as guys who work for the suspension companies i've been told across the board that if you preload the springs the right amount it will effectively double the rates

i'm sure that there is an equation or process though somewhere out there on how to figure this out
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most people don't realize what spring preloading can do for you if you set it up properly (you can effectively double your spring rates just from preloading them
?????????????????????????

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post #33 of 178 Old 07-07-2005, 12:45 PM
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Quote:
Originally Posted by JohnO
so most people includes you???
look if you have a problem with me that's fine.......i couldn't care less to be honest......but please refrain from distracting every thread that i post in

and i never said that i fully understood the benefits of spring preloading did i??? nope didn't think so

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post #34 of 178 Old 07-07-2005, 12:46 PM
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I asked the suspenion guru at work and he said that preloading the spring does not change the spring rate only the point at which the spring starts to compress.

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post #35 of 178 Old 07-07-2005, 01:01 PM
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johnO : lets try not to thread crap the sticky.. thanks.

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post #36 of 178 Old 07-07-2005, 01:38 PM
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Quote:
Originally Posted by cortrim1
I asked the suspenion guru at work and he said that preloading the spring does not change the spring rate only the point at which the spring starts to compress.
hmmmm........could you ask him what if any benefit there would be if you were to preload the springs an extra 50%??

what i mean is.......instead of just making the springs secure so they don't flop around when you jack up the car.........you were to preload them twice as much......does that make any more sense lol

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post #37 of 178 Old 07-07-2005, 01:48 PM
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Quote:
Originally Posted by cortrim1
I asked the suspenion guru at work and he said that preloading the spring does not change the spring rate only the point at which the spring starts to compress.
this is why I sarcastically asked Danny boy if he could let me know how to increase spring rates by preloading

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post #38 of 178 Old 07-07-2005, 01:50 PM
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Quote:
Originally Posted by Sunburst03
hmmmm........could you ask him what if any benefit there would be if you were to preload the springs an extra 50%??

what i mean is.......instead of just making the springs secure so they don't flop around when you jack up the car.........you were to preload them twice as much......does that make any more sense lol
you mean to get rid of unchecked spring travel. I was told that preloading the spring will give a rough ride since you are cutting down on the spring travel. the force that usually absorbed by the spring will be transmitted directly to the upper mounts. example if you have a 40lb spring and put 2" of preload on it then hit a bump that puts 40lbs of force on the spring. the spring will not move nor will it absorb the load properly. As for unchecked movement there is a measurement that can be made to check if you have too much. to measure you need to look at the bottom perch. you will notice that the perch has a flat side that is about 1/4 tall that tappers to a angle. If you can move your spring far enough off the perch that the bottom of the spring reaches the angle on the perch the car is too low. All this has to be done with the car jacked up.

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post #39 of 178 Old 07-07-2005, 01:56 PM
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yes unchecked spring travel........thank you........i had it on the tip of my tongue just couldn't say it lol

i see what you're saying about preloading the springs........hmmmm........i wonder what they meant then when they said you could effectively double your spring rates .......i would like to think the guy knew what he was talking about since he used to be an engineer for Tein and is now an engineer for Zeal

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post #40 of 178 Old 07-07-2005, 02:03 PM
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Quote:
Originally Posted by Sunburst03
yes unchecked spring travel........thank you........i had it on the tip of my tongue just couldn't say it lol

i see what you're saying about preloading the springs........hmmmm........i wonder what they meant then when they said you could effectively double your spring rates .......i would like to think the guy knew what he was talking about since he used to be an engineer for Tein and is now an engineer for Zeal

preloading will make the suspension stiffer but will not change the spring rate. If you you made the suspension stiffer if could be like doubling the rate with out changing the spring. I have put springs in the compression tester at work and can tell you that no matter how far its compressed it will measure the same if its a linear rate spring.

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post #41 of 178 Old 07-07-2005, 02:05 PM
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hmmmmmm.........that could be what he meant by doubling the spring rates

i wish i could remember his name so i could call and ask the guy what he meant

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post #42 of 178 Old 07-25-2005, 08:44 PM
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so does that totally mean that you cant use the megan springs without stiffer dampers?
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post #43 of 178 Old 07-25-2005, 09:00 PM Thread Starter
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It doesn't matter if you use stock dampers or konis, a 2" drop is way too much for stock length dampers. Also, users have reported that the drop is uneven front and rear. Sorry, but I would stay away from this product.

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post #44 of 178 Old 08-30-2005, 06:05 AM
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DanglingFury

Board won't allow me to send you a PM (cause I'm probably a newbie) but here is my question.

I run a R33 full bodykit and I am an IASCA competitor. I have a custom fiberglass install thats weighing me down (more like sagging). I have the stock springs all around so that I can clear most damaging Montreal streets. I would like to drop my front end so that I can actually enjoy some of my performance mods and not just spin through. What in your best opinion would help me out most? Custom made springs? or Coilover set?

Your thread is incredibly complete but no one considers us Audio Enthusiasts whom enjoy performance as much as sound. Any info would be greatly appreciated. If I was to guess I have probably 250-300lbs of gear in the trunk.

Thanks, to all that might shed some light on the subject

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post #45 of 178 Old 08-30-2005, 06:49 AM
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It sounds to me like your best bet is going to be a full set of coilovers. They will permit you to adjust your ride height to your liking i.e. you can slam the car at the show if you so chose and then raise it all the way back up (still lower than stock ride height) when you are done at the show. Also, you will be able to adjust the ride height independently from front to back in order to accomodate for all of that junk in your trunk

Late,
Daniel

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