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Just fitted my FCD to my MY97UK and i get 2psi more on 3/4 throttle and rises to a steady 16.5psi on full throttle
I have not fiddled with restrictors yet either!!! The boost just rises and sits with hardly any spike whatsoever.
I have a full Magnex decat (twin exit D/P), and i ported the manifold and uppipe a couple of months back. Pipercross induction and Samco intercooler hoses.
Car feels much more eager, and fueling is still on the rich side
Iain
**Before i fitted the FCD boost would spike to 16psi and then hold 14psi**