Author Topic: Winter mods: whatcha got?  (Read 6950 times)

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Online fabr

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Re: Winter mods: whatcha got?
« Reply #60 on: February 22, 2022, 06:49:29 PM »
I'm way too lazy to type it all out so I'll link you to this

 https://shocktherapyst.com/the-truth-about-dual-rate-springs/#:~:text=To%20figure%20the%20combined%20spring%20rate%20just%20%28200,travel%20you%20feel%20a%20300%20lb%20single%20rate.

  There is a LOT of info on shock and spring theory out there. It's really some sort of black magic voodoo shit but when you get it right it is heaven.  The above gives a good explanation that most can agree with.
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

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"I fear the day that technology will surpass our human interaction. The world will have a generation of idiots" Albert Einstein  (IT'S OFFICIAL THAT DAY IS HERE NOW!)

Online fabr

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Re: Winter mods: whatcha got?
« Reply #61 on: February 22, 2022, 07:32:26 PM »
Yes,one inch of wheel travel to one inch of shock travel is a 1:1 ratio. Nothing wrong with that but most designers try to have something along the line of 1.5:1 or so . Many design a progressive rate into it so the ratio might go from 1.5:1 to maybe 1.2:1 as an example .  You definitely do not want to go to a regressive rate though.
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
"I fear the day that technology will surpass our human interaction. The world will have a generation of idiots" Albert Einstein  (IT'S OFFICIAL THAT DAY IS HERE NOW!)

Online fabr

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Re: Winter mods: whatcha got?
« Reply #62 on: February 22, 2022, 07:52:09 PM »
Here is a good spring calculator.

https://www.crawlpedia.com/spring_rate_calculator.htm

Bear in mind it is imperative you have good/correct info to input. Shock angle and corner weights MUST be accurate or you are just pissing in the wind. I have a set of chassis scales that you are welcome to use  but they are pretty heavy to ship and I'd prefer not to anyway so you'd likely want to maybe meet me in Tulsa to pick them up maybe. You could just bring them back to LS this spring.Whatever you do you must have car leveled fore/aft and side to side on the scales. All 4 scales must be set up at same height and level corner to corner to corner.
« Last Edit: February 22, 2022, 07:55:38 PM by fabr »
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
"I fear the day that technology will surpass our human interaction. The world will have a generation of idiots" Albert Einstein  (IT'S OFFICIAL THAT DAY IS HERE NOW!)

Offline BrianN

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Re: Winter mods: whatcha got?
« Reply #63 on: February 23, 2022, 06:09:39 AM »
fabr, that is a very generous offer. One that I don't take lightly. One that I hope I can take advantage of. I still need to finish fab work and build a fuel tank. How often are you in Tulsa? I am here Monday-Friday. But can be here on weekends also.

Online fabr

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Re: Winter mods: whatcha got?
« Reply #64 on: February 23, 2022, 06:32:02 AM »
I am in Tulsa hit and miss. Sometimes 3-4 times in a week and maybe not at all for weeks at a time. I never know. When you get all done with the car let me know and we can make it happen one way or the other.What part of Tulsa are you at when there usually? I'm usually somewhere in the NE quadrant.
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
"I fear the day that technology will surpass our human interaction. The world will have a generation of idiots" Albert Einstein  (IT'S OFFICIAL THAT DAY IS HERE NOW!)

Offline Grimm Reaper Racing

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Re: Winter mods: whatcha got?
« Reply #65 on: February 24, 2022, 08:36:19 AM »
Brian,

I used those same pages that Fabr linked to for my suspension.

I believe they suggested ride height for the front springs to have around 1" of pre load, and that the rear should have around 2".
« Last Edit: February 24, 2022, 08:45:47 AM by Grimm Reaper Racing »
See you all duneside.😎🤙

Offline BrianN

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Re: Winter mods: whatcha got?
« Reply #66 on: February 26, 2022, 10:05:25 PM »
I think I have all the major tubes in. Next will be cutting and tacking in a bunch of angle braces before pulling motor and trans to finish welding. The brace between 5 link inboard rods is in. One upper radiator brace is finished. I tested suspension travel and can safely get 18" with 2" of ground clearance and 3" of shock shaft left, with no cv binding. This is on concrete floor. fabr, I work on 11th (route 66), between Utica and Lewis.








Offline dsrace

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Re: Winter mods: whatcha got?
« Reply #67 on: February 27, 2022, 10:34:34 AM »
looks good. the cross support on the upper radius rods is def a plus!

i do not fully understand the wheel travel part unless you have suspension stop? if there is 3" of shaft remaining then the wheel can still travel up? or did i read that wrong? not knocking it just making asking.  :nw



Don't never argue with an Idiot!
Because he will drag you down to his level and beat you with experience

Offline BrianN

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Re: Winter mods: whatcha got?
« Reply #68 on: February 27, 2022, 01:01:49 PM »
You understood correctly. That is just a safe number, BUT I have no idea how I will add a stop with this mod. I don't like the idea of putting a bump stop on the shock itself.  Without any stop (yet) it will hit the ground, because the 3" of shock shaft, the suspension will travel at least another 6". I could just drive really slow so I never bottom out...
I love that meme!

Offline budlight69

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Re: Winter mods: whatcha got?
« Reply #69 on: February 27, 2022, 02:19:53 PM »
Good progress buddy.  Nice fit on all the tubing.  Could you make a urethane bushing 3" long that goes over the shock shaft and fits inside the spring. it would replace the thin little piece of rubber they have? 

I like the Caddy shack pic.  Is anyone going down on the early date of April 6 - 8th? 

Offline BrianN

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Re: Winter mods: whatcha got?
« Reply #70 on: February 27, 2022, 02:32:43 PM »
I am shooting for that date. Hoping to dune with you. Yes, I may have to make a stop in the shock. I would prefer a stop from the frame to the bearing carrier, but that may not work out.

Online fabr

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Re: Winter mods: whatcha got?
« Reply #71 on: March 02, 2022, 06:27:43 AM »
Brian it looks like I'll be making a run to Tulsa yet this week or maybe first of next. Give me a call @ 620-251-0920 mornings and let's see if we can make it happen. If I'm out just leave a contact number and I'lll call you back. I usually will be in T town around 10-11. Wes
« Last Edit: March 02, 2022, 06:34:43 AM by fabr »
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
"I fear the day that technology will surpass our human interaction. The world will have a generation of idiots" Albert Einstein  (IT'S OFFICIAL THAT DAY IS HERE NOW!)

Offline BrianN

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Re: Winter mods: whatcha got?
« Reply #72 on: April 12, 2022, 07:23:44 PM »
Got myself confused. I can hear Glenn telling me to put the crack pipe down for a while! I have used a few spring rate calculators and came up with answers of 464 and 474 lb/in spring rate needed for my new suspension. If these are even close, how do I convert this number into a 16" long and 18" long spring combination? (That is what I currently have) They are 2.5" springs. I am attaching pics of my numbers, just in case someone can help me. The scale weight is the worst (most weight) scenario.
NOTE: In my calculations, I considered my 16" shock to be a 10.75" shock, because I am not using the full stroke. Is this necessary?




Online fabr

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Re: Winter mods: whatcha got?
« Reply #73 on: April 12, 2022, 07:57:32 PM »
First thing, have you deducted unsprung weight from sprung weight?
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
"I fear the day that technology will surpass our human interaction. The world will have a generation of idiots" Albert Einstein  (IT'S OFFICIAL THAT DAY IS HERE NOW!)

Online fabr

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Re: Winter mods: whatcha got?
« Reply #74 on: April 12, 2022, 07:59:35 PM »
Never mind,I just noticed you have.
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
"I fear the day that technology will surpass our human interaction. The world will have a generation of idiots" Albert Einstein  (IT'S OFFICIAL THAT DAY IS HERE NOW!)