Thoughts on Hammer Travel Adjustment

[Motorhead]

Lloyd-ss ....
Where are you ?
Could use ya again in this think tank discussion.

[PakProtector]

I have been doing some thinking ans came across a question that one of you may be able to help me with.  I'm currently doing some tests with my Marauder and would rather not tear it down.  Do any of you know the active coil count of the valve spring?  This would be very helpful and save me time.

Thanks Bill

Bill,
I have it as .0445" wire, with 7.5 coils, OD .336", with free length of 1.391".
Best Regards,
Douglas

[Bill G]

Thanks Douglas.  I'm gonna guess that the modulus of rigidity is 30,000,000psi?  If that is true, the rate would be 84lbs.  Wow!

I'm using k=Gd^4/[8nD^3]

k=spring constant
D=mean coil diameter
d=wire diameter
n=number of active coils
G= modulus of rigidity

Am I on to the right formula?  that seems a bit high. 

[Rescue35]

I got 28.5 lbs with a quick run through the calculator below. Yeah I'm lazy.

http://www.efunda.com/DesignStandards/springs/calc_comp_designer.cfm#calc

[Motorhead]

Bummer this thread has fizzled out .... the possibilities were just starting to take shape   

[lloyd-ss]

I just woke up.  Had to re-read what I could. Have been working with M-Rod, lengthening the stroke to get more usable power without having to use a heavy spring or heavy preload.  It seems to be working.  There are a lot of restrictions inside the M-Rod that make getting the full potential out of it a bit of a chore.
Data  coming.
Lloyd-ss