Quote:
| Originally Posted by psyopper Essentially a lighter bolt will need a stronger rear spring to open the valve the same distance. The heavier spring will increase the dwell as it will take more force from the air to push it back to the sear. |
You could also buy a 32 degrees 9 piece spyder spring kit and trim down the small valve spring until it fits into the valve body, as a lighter valve spring would achieve the same result of higher dwell as a stronger mainspring.