Alltech Motorsports East Coast Shock Tuning Session: Sept 25th-27th

Quality results for minimal investment, to supplement the big investment of coilovers. Good to see that you guys learned and experienced what a great tuner can do for coilovers. Wayne is the man.
 
BUCKEYE PERFORMANCE INC. said:
Just out of curiosity do you know your corner sprung weights and what coils are you using. I know your buggy is lighter than most.
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If josh can measure his exposed shock shaft at ride height per corner, and the coil rates, you can calculate his corner sprung weights. Pretty sure he told me his buggy is around 2600lb total weight.

I'll see if I can find the post on pirate in wayne's spring theory thread that includes the formulas.

http://www.pirate4x4.com/forum/showthread.php?p=14506404
 
Last edited:
100 over 125 front
80 over 100 rear
Buggy is 2600 pounds I have unsprung weigh somewhere I will look for it
 
Initial spring rate=(Main spring rate * Tender spring rate)/(Main spring rate +Tender spring rate)

Shaft showing= Shock Travel – ((Corner weight/Initial spring rate)-Pre-load distance)

So for your front spring example Initial spring rate=(250 * 150)/(250 +150)= 93.75

Shaft showing= 16–((1050/93.75)-3)

Shaft showing=16-(11.2-3)

Shaft showing=16-8.2=7.8"



Just plug in the numbers you know, use X for corner weight, and solve.

@karatejosh, measure how much shock shaft you have showing at ride height.

Front ex:

Rate = (125*100) - (125+100) = 55.5

Shaft showing = 14 - ( X / 55.5)
 
Mac5005 said:
Initial spring rate=(Main spring rate * Tender spring rate)/(Main spring rate +Tender spring rate)

Shaft showing= Shock Travel – ((Corner weight/Initial spring rate)-Pre-load distance)

So for your front spring example Initial spring rate=(250 * 150)/(250 +150)= 93.75

Shaft showing= 16–((1050/93.75)-3)

Shaft showing=16-(11.2-3)

Shaft showing=16-8.2=7.8"



Just plug in the numbers you know, use X for corner weight, and solve.

@karatejosh, measure how much shock shaft you have showing at ride height.

Front ex:

Rate = (125*100) - (125+100) = 55.5

Shaft showing = 14 - ( X / 55.5)
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All that will work if he has zero preload.
 
I can't even run full nitro charge in my shocks it holds my buggy off the springs if I do I only run 75 psi I have emulsion shocks so I can get away with it and be ok my setup is not perfect but that's what's great about wayne he was able to work with what I had and give me what I wanted
 
BUCKEYE PERFORMANCE INC. said:
Totally understand.
If you measure how many inches your 100lb springs compressed that will give you your corner sprung.
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Close.

You are measuring compression of both springs. This is why you have to calculate initial rate first.

Front initial rate is 55.5/ per in. Multiply rate by inches compressed and boom there is your sprung weight at the shock.

Josh's is easy because I knew he has 0 preload front and rear.
 
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