I have a 10mm spacer between the sc and ic. 3mm between the sc and heads. 3mm between the manifolds and sc. I have a ceramic coated ic, y pipe, and snout. I have a separated coolant system vented to atmosphere. I have a giant heat exchanger and two pumps. Results are the same as everybody else. About 20 above driving mellow. 30 to 35 when driving fast.