Spring chart - Unsure how accurate?

[Allan1875]

http://www.petitrc.com/setup/yokomo/...ringsChart.pdf

As per the above spring chart, i was a bit dubious about the rates of the kit rear green and front orange as they felt heavier than quoted.

My friend who measures springs checked them and got the following:

Green rear 2.78lbs
Orange front 4.56lbs

That is absolutely miles from the 2.05 and 3.17 quoted on that chart. Even more confusing is my manual states that the kit springs are both blue front and rear?

I am hoping the Yatabe springs on the chart are closer. Anyone else any similar experiences?

I have asked my friend who measured the rating to post his method here as I am sure you may want to analyse it.

EDIT: Could it be that the new kits now come with the Yatabe springs anodised in black as that would be far more accurate? The reason I never gave this any thought previously is that the kit springs are black and the yatabe springs are that bronze colour.

[Paultje040]

I think the spingchart is no good. With all respect to the makers.

I have a few sets of yokomo springs. I recently bought some Yatabe springs.
I noticed that the Yatabe springs are not an extension of the Yokomo spring set.

The Yatabe set is a set on its own.

For example, Front Yatabe Yellow is noticably softer than the front yokomo blue and even orange.

Same is for the rear sets.

PS i posted about this issue some time ago.

[reg]

Some chat about this on another forum,they have found the same,someone does make a spring lb tester but I can't remember who

[Paultje040]

Spring Gauge tester

[Click link]

[reg]

That's the badger

[Allan1875]

Originally Posted by Paultje040

I think the spingchart is no good. With all respect to the makers.

I have a few sets of yokomo springs. I recently bought some Yatabe springs.
I noticed that the Yatabe springs are not an extension of the Yokomo spring set.

The Yatabe set is a set on its own.

For example, Front Yatabe Yellow is noticably softer than the front yokomo blue and even orange.

Same is for the rear sets.

PS i posted about this issue some time ago.

Sorry mate, I had a quick look but didn't spot anything. I am glad others have noticed this as well. It's just nice to have a gauge as with my old cars, I am used of knowing the ratings etc.

[neallewis]

I'm waiting to get the gforce spring gauge, and will redo the data for the chart. The chart is calculated based on measurement and assumptions, and it is wrong.

[Paultje040]

Originally Posted by neallewis

I'm waiting to get the gforce spring gauge, and will redo the data for the chart. The chart is calculated based on measurement and assumptions, and it is wrong.

Really do appreciate the effort that has gone in to making that chart, and the effort that its going to take to "fix" it.

[Allan1875]

Originally Posted by Paultje040

Really do appreciate the effort that has gone in to making that chart, and the effort that its going to take to "fix" it.

As do I