I am looking at making a couple mods to the 413 in my son's Daytona. We are looking to get it into the low 13s. I am planning on doing the following mods from the knowledge center.
1) Remove accumulator
2) Turn up the pressure regulator
3) Front band adjustment.
I have wondered if need to do any of the others listed in the knowledge center. Ie. Drill out the area to increase line pressure, remove the check ball, replace shuttle valve spring with tubing.
Thanks
Ed
PS. What size screws are used to block the holes on the accumulator?