The engine's coming out for gearbox overhaul, new clutch and drilling the oil return for the turbo into the block, probably like Jim's ZVH conversion. Manged to win a bid for a Garrett turbo from an SX200 last night and have started laying out the manifold plate on CAD and will then CNC machine the plate at work.. Question is I need to get a blanking plate to lower the compression on the head. Does anyone know if the profile is the same for silver top and black top 2L engines? I am going the decompression plate route, certainly for this initial stage, I haven't yet run the calcs on plate thickness required, buit I notice a web site where someone has used 2.5mm and I think Matthew said his was 2 mm ah just checked Matthews was 2.5mm, so may as well do the same. Anyone any idea what material is best for the plate, I notice Ferriday use aluminium and another company I talked to at the Autosport show yesterday used stainless. I can see arguments for and against both, so Matthew do you remember what material yours was? Thanks, Nigel
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