Project Time

"Long_Voyager94" (yourenotavalidusername) 05/15/2020 at 16:05 • Filed to: rallyvan, Voyager, Upgrade

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New rear springs (1,450 lb rating each), all new bushings, new 2" hitch, and new trailer wiring.

Still gotta find new shackles as I am pretty sure mine won’t be salvageable, but I’m hoping as I’ve yet to find replacements.

pip bip - choose Corrour > Long_Voyager94 05/15/2020 at 07:36

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i clearly misused something but  why replace the towbar?

Wacko > Long_Voyager94 05/15/2020 at 07:40

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Just by colours on that board I knew this was you

Long_Voyager94 > pip bip - choose Corrour 05/15/2020 at 08:04

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Because mine has a tiny 1.5" receiver currently with a 250lb tongue rating.

The new one is a 2" with a 400 lb rating, 600 lb with weight distribution.

pip bip - choose Corrour > Long_Voyager94 05/15/2020 at 08:07

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fair enough.

not used to anything other than 2" (other than a H olden Cruze which had a smaller than normal one)

Long_Voyager94 > pip bip - choose Corrour 05/15/2020 at 08:12

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I’ve been towing/hauling more, I want to make sure I’m properly equipped.

Future next gen S2000 owner > Long_Voyager94 05/15/2020 at 10:04

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What shocks are you upgrading too?

Long_Voyager94 > Future next gen S2000 owner 05/15/2020 at 10:17

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I already have almost new ( maybe 10k miles ) KYB gas shocks on the back, I plan on just reusing them right now.

If it turns out they’re not in good shape, I’ll order another set of KYBs and put them on.

Future next gen S2000 owner > Long_Voyager94 05/15/2020 at 10:27

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I’m thinking more damping rate versus the spring stiffness. Assuming the new HD spring is stiffer would require a new shock with different damping rates to maintain an ideal damped value. You can have under-damped, over-damped, and critically damped.

If memory serves correctly, critically damped is 1.0 , under- damped is less than 1.0 and over- damped is greater than 1.0. It’s been awhile since my vibrations class. Most cars are around .8 IIRC, according to my professor.

You probably wouldn’t notice it under normal driving conditions but I would think that you would when towing/hauling . Digging deep into the memory bank here, I assume your new springs and shock combination would be under- damped and therefore exhibit excessive cycles before returning to steady state, i. e. your car will bounce around like a blown shock under heavy load.

Something to consider. I’d call a shock manufacturer and see what you can get if the ride gets all wonky.

Just my 2 cents. Feel free to disregard.

Long_Voyager94 > Future next gen S2000 owner 05/15/2020 at 12:15

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You know, the thought never crossed my mind.

As it stands now, my KYB rears are actually likely over- damped as they’re actually the “hd” shocks for a Chevy Venture van to get the added length I needed with the 2" lift.

I will definitely keep it in mind, if it seems off I will call KYB and see if they can get me a more aggressive version of what I have.

Thanks.

sn4cktimes > Long_Voyager94 05/15/2020 at 12:17

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I generally don’t even try to save shackles. I block up the vehicle/trailer and  just strap the springs to the frame and cut the shackles. It’s been far easier every time; the reverse is playing with heat, and penetrants, and impacts, and rust and dust and chemicals everywhere. I’ve just learned to say F it with the amount things rust up here. You can often find universal shackles to the width you need and then cut the extra length off afterwards. Most trailer springs go with that approach.