Hey guys,
Just recently bought an R34 gtr and have been noticing that when the engine is cold boost pressure is around the 1 - 1.1 bar (thereabouts). After the engine warms to normal operating temperature boost pressure on throttle only rises to between .6 - .7 bar. The only mod the car has is a Japanese exhaust system after the cat and the rest is stock. Any info on what could be causing this would be greatly appreciated