What is the biggest you can stroke an LQ4 to? I have heard 434, but don't know if they go bigger. Would it be more cost effective to try and source all the parts and pieces to build said stroker yourself, or order a pre assembled short from a sponsor or company?

 

I believe it is 4.2 with 70 over bore being around 438. But it you would have to run a vacuum pump to run this thing on the street.

 

What would be the safest overbore + stroke to run with boost?

 

if you want to go over a .030 bore you will need to get the block sonic tested to see if it could handle it. dont buy the parts until you check the block.