Quote Originally Posted by DrHarry View Post
My updated after some more fiddling. I have the 2008 CRD with diesel gas fitted. I fitted a boost guage which noted normal levels up to 15max. I did the EGR block which saw occasional boost up to 17 but by and large the boost seems well controlled by the ECU as I was told to expect in a CRD.

I have just added a 2.5" mandrel exhaust and a pyro gauge and now I am seeing frequent over boost up to 19-20 under light load in 2nd or 3rd gear, on a slight incline. EGT 350-450.

Should I now just adjust the actuator a little? Will this level of boost be likely to do any harm to my engine?

cheers
Harry
An extra 5 PSI of boost pressure (20 instead of 15) multiplied by the ZD30 Compression ratio of 17.9:1 means you are now banging off at significantly higher chamber pressures of maybe mid 600's instead of around 550.

Up to you, cobber but I was pretty sharpish in winding my VNT down. I did, however see higher spikes on mine (22) than you have recorded so far.