540WHP, 335Ft/Lbs
We have a borough's belt tension gauge and the stock tensioner is the correct tension. The manual override is just that. The stock tensioner sets the tension, and you screw the bolt so it cannot back off from that position. I seems to work very well, as we have has no further issues. If you ran the larger 140mm+ crank pulley, this would increase the SC pulley size for more belt wrap. We chose not to do this due to speeding up the accessories. We added the al onto the outside of the tensioner pulley to get a bit more belt wrap on the SC, as our choice of belt lengths is limited in Australia. As the belt wears and stretches the auto tensioner will still operate normally. From time to time you can re-adjust to remove the gap created on the adjuster stop.
The adjuster is simple to make. Its a steal block with an 8mm thread in the horizontal plane, and the whole for the pulley mounting bolt. You will need a spacer for alignment back to the stop. The stop is just a bracket bolted to the cam chain cover. Using the ADL2 we logged the SC speed and engine RPM. Another channel was created for the drive ratio. Without this manual override we were getting massive belt slippage. Even under the worst acceleration during flat shifts, we have no problems now with slippage.
