I have a fully built turbo d16y8. It stays cool fine until I start getting on it if I have been driving for more than 15 minutes even if I'm running low boost. I have an aluminum racing radiator and a front mount intercooler. What else can I do to keep my baby cool?

 

What engine management, and do you have ARP headstuds?

Sounds like your lifting the head if the car only overheats when you boost it.

 

Its an ob1. And I'm not sure if I have stock headstuds or not. I bought the car from someone else who had already started the engine build.