Originally Posted by Adam-M

Ahh good old Shitec racing? Been there done that and won't do it again.

OP my mate owned a mk1 rs and his has boost problems, got it smoke tested and turned out to be a hose burst, iirc it was a short black hose under the inlet manifold and was about 15mm inside dia. That was burst quite bad then his blue charge hoses went after he got that sorted.