are my 30#ers too big for my set up?

[Murdock]

Your injector size is fine. What is your base timing & fuel pressure?

Changing injectors does necessitate an MAF recalibration if a chip is not used. Changing the fuel & timing maps on a chip it totally different than pumping up the fuel pressure and setting a global timing advance. However if you are just deviating from the stock settings a few psi & degrees then you own all the tools you need.

Jimmy