Originally Posted by mugenb46

HEAD SHIMS, the GO engines are set out of the box to run 30%, the extra shim id for breakin and it does help a little, the newest 5 ports do come with 1 alum, and 2 gold shims, this is what you would normally run with 30%, i to have ran the extra shim just to gain a little top, but this was added after i reshimmed the squish to 22 thous. My modded 3 port is also at 22, with timming being where it is i use 1 thin shim

To breakin the 5 ports, heat it to atleast 240, and 220 after that for the rest of the breakin, and do use foil on the head, it helps the heat from leaving the head area, and when you restart, wait till it gets to about 115 degrees then fire up after heating

Carby inserts, i use the 8 mm in the 3 port, and get around 10.15 runtime at 210 degrees with Tilted race fuel and OS P6 turbo

When you switch from standard to turbo leave the same shiming, if you need to tame it down some add 1 thin shim, and your good.