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Old 12-21-2015, 10:50 AM   #1
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Spring Pre-Loader - JOES Racing Products




This is a interesting new items from joes.

I don't know if it has any Miata Applications but we steal parts and other things from circle track guys all the time.

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There can be huge advantages to using a spring Pre-Loader on your race car. It is most commonly used on the right rear and allows you to run a soft spring but pre-load it so it has a high static load. You will get the benefits of running a heavy spring to get you into and through the center of the corner but also have the benefit of a lighter spring for more traction coming off the corner. For example, if you have a 500lb spring in the right rear of your car and it has 500lbs of weight on it, it should be compressed 1". If it travels another inch it will have 1000lbs on it. Now if you use a JOES Spring pre-loader and compress a 125lb spring 4 inches it will have 500lbs on it. If it travels another inch it now has 625lb on it, 375lbs less than a 500lb spring. Fits all major shock brands and 10”-12" x 3" diameter springs.

Add on a JOES Travel Indicator to easily track your spring compression accurately.
clif notes: it allows you to run a softer spring and it will behave like a higher rate spring everywhere, but corner exit. give you more grip to power on.
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Old 12-21-2015, 11:35 AM   #2
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I doubt it has any miata applications unless someone you know is willingly using 10" long, 3" diameter springs.
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Old 12-23-2015, 05:44 PM   #3
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What new capability does this bring? Adjustable perches already allow for variable spring preload. It's always possible to use a spring compressor to assemble coilovers to get arbitrarily large preload within the structural capabilities of the threaded body and perch (whether or not it's a good idea).
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Old 12-23-2015, 06:36 PM   #4
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Old 12-23-2015, 09:24 PM   #5
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This seems like a solution to a problem that exists due to rules in a certain governing body.
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Old 12-26-2015, 05:45 PM   #6
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could be^. Joe's is know for having very nicely built and engineered products. When new items are released we will post it for the community to discuss.
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Old 12-26-2015, 11:40 PM   #7
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Someone bitch me out if I'm wrong. But isn't the point of linear springs to have the same spring rate all the way through the compression? So doesnt matter how much preload it has, it will still be the same spring rate?
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Old 12-27-2015, 12:10 AM   #8
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Quote:
Originally Posted by aidandj View Post
Someone bitch me out if I'm wrong. But isn't the point of linear springs to have the same spring rate all the way through the compression? So doesnt matter how much preload it has, it will still be the same spring rate?
Yes, but adding extra preload to one corner (jacking) is common for circle track. This corner-unbalancing is a useful tuning point for tracks with more turns in one direction than another, which is why they mention adding preload to the RR spring.
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Old 12-27-2015, 02:41 PM   #9
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I feel like they add preload when we just move our collars up or down.
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