For my build up, I'm doing a GSR block with the pr3 pistons, and a Pr3 head with crane cams. A rough estimate of around 11.5:1 compression. What i have searched for but have had no luck is, can I still use the stock injectors and the stock pr3 ecu? Or really what the question should be is what do i need as far as bigger injectors, fuel pump, fpr or fuel rail. I'm on a huge budget but i don't want to blow up my motor. Any help from people would be highly appreciated. Thanks.

 

Stock injectors would be o.k. One of the best investments you can make is engine management and tuning.