Im running a JRSC on a d series with 10 psi. best thing I have ever bought. Its is true ditch the FMU and get some bigger injs. LHT makes a air/water intercooler for the JRSC most say it drops temps by 100 deg. The JRSC is a very good upgrade when tuned.

 

are you using the watercooler on your setup?

 

Nope 10 psi and no detonation. It would help if i wanted to put more timing in it though.