What internal modifcations do I need done to handle 15 pounds of boost on my daily driver. I'm trying to save any money I can. So parts I can get away with - that will work out great. Like I know someone running 10 pounds and using the stock crank - So any little help will be great

 

15psi is a lot for an LT1 on pump gas. The primary thing you will need to do is lower your CR to the 8-8.5:1 range with the use of a good set of forged pistons. An upgraded set of rods is also in order. The stock crank may be sufficient, the main problem there may be failure of the crank snout due to the stress of the blower belt. So, it should probably be replaced as well. IOW, you need a new rotating assy.

Rich

 

You need an upgraded fuel system and I would run 8-8.5:1 compression. You also need decent intercooling to run a decent amount of timing to make some power. 15psi on a 355ci LT1 sounds decent but if you can only run low timing advance a person with 12 psi and better 'cooling might make the same power.

 

15lbs of boost with what? A small supercharger, thumper turbo, large supercharger, small turbo? All depends on what blower your running. From there we can start recommendations