Quote:
Originally Posted by 304065
Squirters forbidden in Appendix K? I wonder what the rationale is, seems to me that you can enhance longevity and run the piston a little cooler, but wonder whether a true performance increase is offered?
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I think I need to try to be very clear.
Period F Cars are based on Homolgation Form 183 and non of the extensions to these papers can be applied without moving the car to Period G.
If this is the case then I think the question should be 'why do we believe squirters are acceptable' as they are clearly not a period feature of an early pre 1966 911.
I would agree that squirters are not specifically prohibited but to justify their inclusion in an engine on the basis that they only help reliability and don't give a performance gain isn't entirely a 'solid' arguement with regard to FIA regulations and the way that they can be interpreted.
Could we not argue that by cooling crowns we can run engines harder so that without squiters they would fail. This does then become an enhancement?
If we have to build engines that fully comply with Appendix K, I would be looking for a paragraph in the rules that specifically allows this modification rather than assuming its OK.
During the last couple of years I think we are seeing a hardening of attiudes and an increase demand that cars fully comply with all aspects fo Appendix K.
Mods that were not strictly allowed but that had been common practice are now being complained about and the wording of Appendix K is being strengthened in some key areas.
I think the opening statement of Appendix K is very clear:
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A set of rules to preserve the specifications of the period and prevent the modifications of performance and behaviour that could arise by the application of modern technology
I was at a meeting at the end of last year where the Historic Technical Committee decided to hold an open day to answer detailed questions concerning current attitudes to modifications and how these would be administered.
The opening statement of Apendix K was readout out at the start of the meeting and we were all informed that mods designed to significantly enhance reliability beyond preiod specification were equally as forbidden as performance boosting mods. As you can imagine much argument ensued but attitudes were quite unmoved.
The caveat was that new parts could be made using material substitutions permitted by Appendix K.
The squirter mods that I would agree have been used for some time, have I believe, been justified by the fact that Appendix J of the period specified lubrication systems as 'free'
The Technical Committee also pointed out that Paragraph 3.3.3 states:
Freedoms granted by Appendix J of the period does not confer complete freedom but rather authorises the use of components and/or modifications that were actually used in period on the particular make and model as a result of those period freedoms
I would be worried, in the current climate, to build an engine with squirters and then have it pulled apart and a 'Black Dot' applied to the HTP - hence this rod modification.
I am sorry to have banged on but there are several grey areas on some well known Appendix K cars and they are being increasingly looked at and debated.
I also accept that these rod changes could be seen in the same light but much less noticable than genuine squiters.