Hi all,
The following list is an extract from a PDF document titled 'List of previously Homologated Cars' that can be found on the FIA website under the section titled 'FIA Historic Racing Championships' (Source:
http://argent.fia.com/web/fia-public.ns ... omolog.pdf)
Hom. Grp Make Model Cyl. Hom. Date ASN Ext
37 GT Morgan Plus 4 1991 10.06.1961 GB 0
64 GT Morgan Plus 4 Super Sports 1991 16.06.1962 GB 1
128 GT Morgan Plus 4 Super Sports 1991 09.05.1963 GB 0
131 GT Morgan 4/4 1498 05.09.1963 GB 0
175 GT Morgan 4/4 1498 16.11.1964 GB 0
Although not dated 1965, is Hom. 128 the one Andy was thinking of in ralation to: 'TOK with TR based Lawrence cross flow unit'?
I only have Hom. 64 papers, but in this it says in relation to Axle ratios - Final drive ratio of 3.73, and lists Alternatives as 4.1, 3.56 & 2.8
Addtionally, although the papers primarily detail the engine to be 1991cc (Bore 83mm Stroke 92mm) they do also list an alternative engine capacity of 2138cc (Bore 86mm).
Like you John, I was of the view that the Homologation papers represent the statement of fact in determining 'Period Specification' as defined in Appendix K, which, in Regulation 3.3.7 states 'For Homologated Cars, only Original FIA homologation papers, with such extensions and variations, as were homologated in the period concerned are valid.'
Addtionally App. K states in relation to Morgan
'The only model eligible with the 2.2 litre engine in Period F is the Plus Four Super Sports conforming to FIA homologation form n° 64 of 1962.'
One, it seems, also needs to bear in mind what Appendix K allows too, i.e. with the Super Sports classified under 'Post 1946 Competiton Grand Touring Cars (GTS)' Sub Appendix IX - Modifications Authorised for Cars of Period E,F and G1 for Competition Touring Cars and Competition Grand Touring Cars' allows for example, reboring 'to a maximum oversize of 1.2mm of the original bore, provided that the increase does not change the period capacity class of the car.' Also 'A limited slip differential of a type conforming to a period specification for that model may be used'. These are just two examples, other alterations are permitted.
In relation to
'Ps. Food for thought: XOV is the only +4, I know of, that holds FIA papers and is not required to run with a hard top on account of it holding a piece of paper saying it raced in period without one. That being the case shouldn't we be in a position to lay claim that we are doing nothing more than copying XOV? That way we would avoid the requirement to cocoon ourselves in our cars. Personally, I hate the idea of having to put a hardtop on the car.'
From an HTP perspective I believe there would be nothing at all to stop anyone from altering their Morgan to match XOV's specification/it's FIA HTP papers (the HTP is only confirming a car matches a period specification afterall). I suppose it comes down to what you want your car to be described as / event you want to take part in / year and class that's going to offer the most fun!
So it would seem then the options would be:
Prepare your car to XOV spec (whatever spec that is,and approved by the MSA/FIA) for period E
Prepare your car to Hom 37 Plus 4 (period E) spec i.e. 1991cc with max 1.2mm overbore, LSD etc
Prepare your car to Hom 64 Plus 4 Super Sports (period F) spec i.e. 1991cc or 2138cc with max 1.2 overbore, LSD etc.
One further point of interest for me is the classification of Hom 37 cars in App K GTS class. Initially when I was trying to determine what App K class applied I determined that the Plus 4 SS was clearly competition derived therefore GTS. I assumed the Hom 37 being for a 'Plus 4' would therefore fall under the GT classification, but since John says the detail of Hom 37 and 64 are almost identical it makes sense that Hom 37 cars are GTS too?
Regards,
Simon