i ahve a drag kit on a ls motor, should i retart or advance the timing, and how much shold i. running 4 pds thanks alot

 

retard it 2 degrees.

 

ok igniton timing or cam timing?

 

Since you're only runing 4 psi of boost, ignition timing can be left stock, assuming you're pumping premium fuel. On a B18b , prob no need to retard timing till around 7-8 psi. Then you'll prob want to retard timing at the distributor about 2 degrees. Of course, this is all assuming you have properly installed the DRAG fuel pump and FMU and have no fuel issues...