I applied weight to one spring pack only so rate was 203 lb/in per spring pack. Take roughly 20-25% of that for friction and binding of leaves and you arrive at the factory quoted spec for four leaf pack on a B120. Reason why with composite leaves they say use roughly 20% higher spring rate is due to the lack of friction in a mono leaf design i would think.

how open are people to sharing the cost of postage to send the main stock leaf to Mark. I guess this way he can test and measure and it will be 100% for sure because at the moment it seems we are getting nowhere. Unless someone knows a leaf spring specialist in OZ that could do this properly.

NIS2000, so what you're saying is that based on your assumptions on where the weight went despite the chassis being linked to 4 wheels, and the fact that the measured rate was over 200lb/in, 149lb/in is correct because of a fudge-factor you invented to get the answer you wanted? deadset...

D are you suggesting they just buy them instead?

oh and did i mention that virtually the same result divided by 2, round 2 the closest mm, in droop is achieved if the weight is applied direct center, over the top of the third member in the tray. Mind you i did say all along rough measurments if you read my posts. Why dont you try it for yourself Mr i'm Automotive engineer of the century, don't just take it from little old me, and i take it your also telling Mr Nissan he doesn't know what he's on about too. You did realise that 30 year old set of springs with worn insulators was going to bind a little more than a new set didnt you?

that link in Japanese can be better translated but shows the different heights available from custom supplied setups for the lwb utes so should be sent to mark if peeps want the 70mm lowered one which is a levelled out height.
I would prefer composite than the similarly price jp ones.
The ute heights displayed on the pics can at least give peeps a good idea at least of how they sit.

50lb/in is not a little more.
150lb/in 30 yrs ago does not equal 200lb/in today!

Also should have said measurment was taken from wheel arch center to ground, so some tyre compression was also included in droop figure. This would bump rate up further at that ROUGH 22mm figure if tyre compression was subtracted. All i'm saying is the spring rate is very close to quoted Nissan spec, as you would expect given it is a standard pack, my experience with loading know 500kg loads in tray(over loaded with additional passengers) in past and where springs sit with that known load. Of course if want accurate results you could do a complex lengthy mathematical theoretical equation, order a new pack and put it in a test rig if you don't trust the nissan figure, whats the point? Your not going too get everyone to agree on ride height preference or spring rate they want in a custom composite monoleaf anyway. I would not enter into a group buy like this for that very reason and for same reason i'm not spending my time doing accurate measurements to prove you wrong. I was just trying to assist with a bit of basic info and ROUGH measurments that took 5minutes of my time.

thanks for your time helping nis2000. All info giving from members gets us one step closer.

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