As promised, here's a few notes on my attempts to reduce under-bonnet heat. The manifold is wrapped in Kevlar-backed insulation (avoid the cheap E-Bay stuff. I got mine from a Company called Agriemach - no connection) held with stainless jubilee-style strips. Not aesthetically very pleasing but should obviate the problems which have been mentioned connected to tightly-wound manifold wrapping. Belt and braces I used light alloy expanding ducting (roughly 3.5 inch od very cheap from diy stores -- it's used to exhaust cooker hoods) on the air inlet pipe which I had previously noted was getting hot. I sealed the ends with 90mm id adhesive-lined heat shrink. Probably many sources but I got mine from Rev Tec (no connection). Went for a stimulating 40-mile blast today and I'm convinced the underbonnet temp is far lower and the bonnet stays, held by clips along the bonnet hinge, were hardly warm. Previously they almost burned my fingers. pip pip
