The biggest weakness of the stock clutch system when you want to upgrade the spring pressure is not actually the spring, but the pin that retains the spring seat. That little itty bitty pin is taking the full force of that spring pressure, both seated pressure and loaded, which is several hundred pounds. That pin will either, bend, snap, bend and snap, or the slot in the clutch shaft will begin to elongate.
This is always the problem with trying to upgrade driveline systems. You make one thing stronger and all it does is expose the next weakness.
I am also not a big fan of how he dremels out the inside of those springs to make them fit. That will not only alter the spring rate, but make the spring weaker and introduces stress points that can lead to the spring fracturing. If you overheat the metal while grinding it away you can also change the temper on the spring steel, reducing it's spring rate and again, introducing a weak spot.
All of that said. This spring is the same length as the springs on the list above, but has a 19.66mm inside diameter so it should fit the shaft with no dremel work, and has a spring rate of 36.8lb/mm, and has a total compressed load of a hair over 300lbs. If it's any better or worse than the stock spring I could not tell you. For all I know it could be weaker, but that is the only off the shelf spring I could find that would functionally work with no modifications.
This is always the problem with trying to upgrade driveline systems. You make one thing stronger and all it does is expose the next weakness.
I am also not a big fan of how he dremels out the inside of those springs to make them fit. That will not only alter the spring rate, but make the spring weaker and introduces stress points that can lead to the spring fracturing. If you overheat the metal while grinding it away you can also change the temper on the spring steel, reducing it's spring rate and again, introducing a weak spot.
All of that said. This spring is the same length as the springs on the list above, but has a 19.66mm inside diameter so it should fit the shaft with no dremel work, and has a spring rate of 36.8lb/mm, and has a total compressed load of a hair over 300lbs. If it's any better or worse than the stock spring I could not tell you. For all I know it could be weaker, but that is the only off the shelf spring I could find that would functionally work with no modifications.
