Just fitted a SECS data monitor, and turbo boost displays a peak value of 1.10 Bar. Is this correct as i thought a standard UK car (bar a full decat exhaust) should be running approx. 0.8Bar?
Anyone got any ideas?

 

All depends on how accurate the gauge is, you wont know if it is accurate or not unless compared with another system.

 

SECS reads from the ECU and will only depend on MAP sensor accuracy which is typically +- 1 or 2% although I found no precise info on the Scooby sensor.

If a MY99/00, target boost is 13.7 PSI, an overboost up to 1 PSI above that is acceptable. More than that and the boost control is undesirably underdamped and should be corrected.