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<  Newcomers  ~  A7 period modifications

PostPosted: Fri Nov 02, 2012 12:45 am
Posts: 12Location: Bo'nessJoined: Thu Jan 05, 2012 11:21 pm
Where can I find details on what "period modifications" would be allowed on a class A7 Ginetta G15?


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PostPosted: Fri Nov 02, 2012 8:38 am
User avatarPosts: 615Location: AberdeenJoined: Wed Jul 30, 2008 1:47 pm
If its anything to do with Ginetta's, G4addicted is your man. He will be along in a minute trust me.



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PostPosted: Mon Nov 05, 2012 2:29 am
User avatarPosts: 1809Location: InverebrieJoined: Thu Jan 03, 2008 10:56 pm
The G15 was in production from 1968 through to 1974, and a 'period modification' generally speaking would be anything that was available while the car was in production. So, for example, replacing the standard Strombergs for Webers would be OK, but Jenvey throttle bodies a 'no'.



All of that has to be considered in the context of what the MSA Blue Book allows for road-going production cars, although the G15 would probably be 'Specialist Production' because of the numbers. Even though it is the most successful of the production models in terms of numbers. a little over 800 cars in 6 years probably makes it 'specialist'.



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PostPosted: Mon Nov 05, 2012 12:42 pm
User avatarCuddlesome ChapPosts: 794Location: Muchalls/LuandaJoined: Sat Dec 29, 2007 2:57 am
I would have thought a 'period modification' would have been a modification which was available and had been done during the class eligibility period (up to 31 dec 1979) rather than during the production run.



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PostPosted: Mon Nov 05, 2012 5:59 pm
User avatarPosts: 1809Location: InverebrieJoined: Thu Jan 03, 2008 10:56 pm
You might be right - mine was just a view. Rob McKinna is the only one who can give a definitive answer, as he rules on such matters...



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PostPosted: Mon Nov 05, 2012 6:00 pm
User avatarPosts: 1809Location: InverebrieJoined: Thu Jan 03, 2008 10:56 pm
PS - it would be great to see a good G15 clean up in A7...



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PostPosted: Mon Nov 05, 2012 6:00 pm
User avatarBroken BlokePosts: 3524Location: Old AberdeenJoined: Fri Dec 28, 2007 4:39 pm
g4addicted wrote:
... Rob McKinna is the only one who can give a definitive answer ...


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PostPosted: Mon Nov 05, 2012 6:08 pm
User avatarBroken BlokePosts: 3524Location: Old AberdeenJoined: Fri Dec 28, 2007 4:39 pm
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PostPosted: Mon Nov 05, 2012 7:22 pm
User avatarCuddlesome ChapPosts: 794Location: Muchalls/LuandaJoined: Sat Dec 29, 2007 2:57 am
g4addicted wrote:
PS - it would be great to see a good G15 clean up in A7...




I agree, I have always fancied one myself just not sure about fitting one :(



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PostPosted: Mon Nov 05, 2012 9:37 pm
As regards the hills I have always felt that it is a great pity that the Classic and Thoroughbred Class is restricted to the MSA Road Going category. With the target time system I (and I think most of the A7 competitors) would welcome all categories of cars meeting the manufacture date stipulation competing in a Classic and Thoroughbred Class. However I would imagine that Sprint competitors might feel differently as sprints are scratch competitions.



As regards the Ginetta it would be very welcome in A7 (if it complies with all the various rules) Although the hills run a target time system there is always class track records to aim at. However if the target time system doesn't appeal then A8 is run on scratch times.


PostPosted: Mon Nov 05, 2012 10:10 pm
Posts: 12Location: Bo'nessJoined: Thu Jan 05, 2012 11:21 pm
Thanx all. I'll speak to Rob, the car is at an early stage of build, so I can adjust spec as required. I do have a copy letter from Bob Walklett confirming twin 40s were fitted as an option, so that's a help. Not sure of capacity can we bore/stroke past 1040?


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PostPosted: Mon Nov 05, 2012 11:13 pm
Posts: 12Location: Bo'nessJoined: Thu Jan 05, 2012 11:21 pm
Ok looking at the MSA regs- basically road going specialist, which states the head and block require to be externally identifiable as production, no restriction on capacity? So a 1220 imp would be ok, or one of those 1380cc imp engines Shrigley engineering is looking at using a crank cradle from something else machined to fit inside an imp block?


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PostPosted: Tue Nov 06, 2012 9:22 am
User avatarPosts: 458Location: DunfermlineJoined: Fri Dec 28, 2007 6:35 pm
Stakhanovite wrote:
Ok looking at the MSA regs- basically road going specialist, which states the head and block require to be externally identifiable as production, no restriction on capacity? So a 1220 imp would be ok, or one of those 1380cc imp engines Shrigley engineering is looking at using a crank cradle from something else machined to fit inside an imp block?




I fear that you are now straying away from "period modifications" :?



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PostPosted: Tue Nov 06, 2012 1:30 pm
User avatarPosts: 347Location: AberdeenshireJoined: Fri Jan 04, 2008 12:41 am
Stakhanovite wrote:
Ok looking at the MSA regs- basically road going specialist, which states the head and block require to be externally identifiable as production, no restriction on capacity? So a 1220 imp would be ok, or one of those 1380cc imp engines Shrigley engineering is looking at using a crank cradle from something else machined to fit inside an imp block?




You need to bear in mind A7 is a purely Scottish class, so defined by 'local' rules and scrutieers. The MSA rules you're looking at apply to their definitions of road / modified / racing, which are our 'A1/B1 thru A6/B6' classes.



Murray - you'd fit in one OK, particularly with original seat. Our first G15 was bought about a 4 hour journey away, and I refused to let David spend money without seeing what he was buying, so we went in a friends G15, John driving, me in the passenger seat and David behind the seats! Anything is possible!!



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PostPosted: Tue Nov 06, 2012 1:32 pm
Posts: 403Location: AberdeenJoined: Sat Jan 12, 2008 10:55 pm
Old998Mini wrote:
As regards the hills I have always felt that it is a great pity that the Classic and Thoroughbred Class is restricted to the MSA Road Going category. With the target time system I (and I think most of the A7 competitors) would welcome all categories of cars meeting the manufacture date stipulation competing in a Classic and Thoroughbred Class.




I agree with Mr 998



It would be great to see some classic single seaters (Lotus 51 etc) out to play.



A potential difficulty with any change may be that the A7 Class record is lowered which could have an effect Highland/Lowland scores which are based on a % of the class record -but I'm sure that could be surmounted.



The more in A7 the merrier!





JP


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