petterelmon FC 74506 Posted November 10, 2015 Share Posted November 10, 2015 Hi Does anyone know of a cylinder head for spitfire 1147 that has part number 211289? I'm preparing a spitfire for historic racing and this part is mentioned in the FIA homologation form 165 as optional equipment to the Le Mans-style aluminum 8-port head. I'm very interested in finding out if that head is a cast iron 8 or 6-port head.See photo. Is it possible to see in that photo if it's an 8-port or 6-port? Quote Link to comment Share on other sites More sharing options...
rustbuckit2011 Posted November 12, 2015 Share Posted November 12, 2015 I cant give you a definitive answer, but the combustion chamber is the same shape as an 8 port. They did cast some in steel too, so my money is on 8 port. Quote Link to comment Share on other sites More sharing options...
Dannyb Posted November 12, 2015 Share Posted November 12, 2015 I had an 8 port fitted to my 1965 mk1 back in 1970 that was steel. Quote Link to comment Share on other sites More sharing options...
petterelmon FC 74506 Posted November 14, 2015 Author Share Posted November 14, 2015 Thank you for your reply! Quote Link to comment Share on other sites More sharing options...
RRR Posted November 16, 2015 Share Posted November 16, 2015 From what I can see/understand the picture shows the works 8 port head as used on the Le Mans cars.These were produced in cast in both iron, and aluminium, and from what I understand in 64 the Le Mans cars used the cast iron head. The aluminium heads were first used on the rally cars, and then having proved their reliability were used in 1965 on the Le Mans cars as well.To confuse the issue Triumph also offered a slightly different 'productionised' 8 port to the public, principally through SAH.The main identifiers being the stud positions on the exhaust/inlet side, and the combustion shape. The SAH heads retaining the 6 port style chamber.I must confess that much of this is third hand information from a bit of an anorak, I've only managed to examine a few photographs.Much depends on the regulations you are preparing to, as the 1147 engine can perform very well indeed.This link might be interesting .http://www.jagclub.ru/1147.html Quote Link to comment Share on other sites More sharing options...
GT6DavidMK1 Posted November 20, 2015 Share Posted November 20, 2015 The eight port head I have 🙂 has the part number 513964, has been all flowed and polishedDavid. Quote Link to comment Share on other sites More sharing options...
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