Speedex Heads

[Ian Williams]

I see Alan that makes sense, however the 9E copies that I have encountered all have virtually identical combustion chambers to an original 9E in my possession. To help clarify this for readers, I have an Alan Raeburn Alloy version from the 80's, which is a very good quality heat treated LM25 casting. I believe Paul Bonewell had the patterns after Alan died and was casting these up until quite recently, certainly a friend of mine purchased one from him about 5 years ago and the quality of that was comparable with the one I own. I also have one of the Cast Iron copy's that Tony Betts was selling until quite recently, another friend also uses one of these and we both have had good results with them. Over the years I have experience of Silvertop, Ricardo, Speedex and LRM, as well as modified 37' and LC heads, in all honesty, with exception of the LC, differences are pretty marginal, but all better are I believe than std unmodified heads. With the amount of positive feedback around Dave Dye's Ricardo heads I would suggest they are probably one of, if not the best option currently available