I recently bought some Proline Powerstroke shocks for the 3s/4s line to upgrade my stock shocks on my Outcast 4s. I wanted to share my experience and thoughts.
The preload in the pictures was set to the minimum just to show how ineffective the yellow stock shock springs are at holding the Outcast 4s's weight. The proper ride height can be obtained by setting the preload to about 75% on both sides. However, this effectively takes the softer dual rate springs out of the equation entirely, as they are completely maxed out.
I was able to find a Proline spring rate chart and compare it to the stock shocks rate. According to rate chart info comparison I made, the red bottoms with the yellow tops should be equal to the stock spring rate, which was a bit weak for my liking (and most people's from various forums.) I think another interesting point to note is the Proline Powerstroke spring lengths are drastically shorter than the stock shocks. Note the Tekno springs and the stock springs will NOT fit on the Powerstroke shocks as they are too wide. Also the shafts are 3.5mm as opposed to the 4mm stock shafts on the 4s line.
My opinion is in order to meet the demand for the more popular spring choices, Proline will need to develop an even stiffer (or longer?) spring option. I believe the Proline Powerstroke shocks were developed more towards the 3s line.
PowerStroke 6359-00/01 Review
Drop Test
The preload in the pictures was set to the minimum just to show how ineffective the yellow stock shock springs are at holding the Outcast 4s's weight. The proper ride height can be obtained by setting the preload to about 75% on both sides. However, this effectively takes the softer dual rate springs out of the equation entirely, as they are completely maxed out.
I was able to find a Proline spring rate chart and compare it to the stock shocks rate. According to rate chart info comparison I made, the red bottoms with the yellow tops should be equal to the stock spring rate, which was a bit weak for my liking (and most people's from various forums.) I think another interesting point to note is the Proline Powerstroke spring lengths are drastically shorter than the stock shocks. Note the Tekno springs and the stock springs will NOT fit on the Powerstroke shocks as they are too wide. Also the shafts are 3.5mm as opposed to the 4mm stock shafts on the 4s line.
My opinion is in order to meet the demand for the more popular spring choices, Proline will need to develop an even stiffer (or longer?) spring option. I believe the Proline Powerstroke shocks were developed more towards the 3s line.
PowerStroke 6359-00/01 Review
Drop Test