how much boost can a 420a hold with out doing any internals? reason being is cause im being offered a turbo kit set at 12lbs

 

first of all what type of turbo makes a bug difference. And how do you know what its set at, you can get a boost controller and set it at what you want. unless that is the lowest the wastegate will go. But in general about 8psi is the max you would want to go...assuming you add the fuel and tuning necessary

 

^What he said, what turbo you plan on running makes a huge difference.

 

i was told it was set @12lbs, but im not 100% sure if its true, and how much do electronic boost controller go for