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Elfin Type 100 monocoque


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#251 SJ Lambert

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Posted 11 November 2014 - 11:49

These days the big engined cars run with the twin cams as long as they don't run wings - last weekend Peter Strauss's BT 31 (ANF1) ran as a Group O entrant with 2.5 RB V8, Bill Hemming ran with the open wheeler Group Os in his Elfin Type 400 (4.4 RB V8) listed as an O Sports. There were even a few Group O entrants listed with 1970 manufacture dates.......... Never have had the run on rule explained to me....... Not that that's necessarily what's going on with the 1970 built cars....

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#252 Ray Bell

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Posted 11 November 2014 - 12:42

But what about capacity distinctions?

Are there none?

#253 Bandola

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Posted 11 November 2014 - 20:02

The CAMS historic groups make no distinction between racecars of different capacities. They just have to have been raced in the stipulated periods and meet the group description.

 

The run-on rules allows a car built/raced after the end of a group period but of exactly the same type and specification of the car  originally built in period to be classified as of that group. eg the Brabham BT29 was built from 1968 to 1970 but 1970 versions can be classified in Group O so long as they are of the same specification as those built up to 1969. 

 

This is the general description of Group O from the CAMS Manual:

 

 

Group O

HISTORIC RACING & SPORTS RACING CARS (1966-1969)

The classification of vehicles within this group will be at the absolute discretion of CAMS. This group is intended to cater for racing, sports racing and sports cars with a competition history

established in the period between 1 January 1966 and 31 December 1969, excluding vehicles fitted with aerodynamic devices as defined under “specific requirements” below. Formula Vee, Formula Ford, Sports Sedans and Formula 5000 cars are also specifically excluded from this group which is intended to reflect the development of wide treaded racing tyre technology and its effect on suspension and chassis design but stopping short of the period when external aerodynamic devices became a major design feature with a significant impact on cornering performance.

Consideration may also be given to the classification within this group of vehicles constructed between 1 January 1966 and 31 December 1969 but with a competition history established subsequent to 31 December 1969, or in some cases without a competition history, provided that the specification of the vehicle is consistent with the general standard of technology evident in vehicles raced during the group period and the vehicle is compatible in appearance with such vehicles.

 

CAMS doesn't record lap records. These are generally recorded by the track owner or the clubs running the meetings and they can distinguish between different capacities and car types if they wish.



#254 SJ Lambert

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Posted 12 November 2014 - 20:33

image.jpg

Geoff Vary running the ex Brian Lear 6550 for the first? time.

Edited by SJ Lambert, 14 November 2014 - 10:03.


#255 Ray Bell

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Posted 14 November 2014 - 14:13

It didn't have the radiator exhausts when built, did it James?

It just doesn't seem right that Brian is no longer the owner/driver, but time marches on and cars change hands...

#256 SJ Lambert

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Posted 15 November 2014 - 12:52

I think it did actually Ray, I seem to recall seeing a shot of Norm Butler attending to the car with Garrie in the cockpit when new. As it is the Mk2 prototype and Garrie's personal car I presume it was the first to get that bodywork upgrade - even though at least one later car (ours) was fitted with a non vented nose.

Squared off engine covers came later again.

Yes, seeing that car, one automatically recognises it as Brian's, I had a chat to Geoff - he's a nice bloke, loves the car & must have got the thumbs up from Brian!

#257 SJ Lambert

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Posted 07 December 2014 - 11:12

I see Chuck Krueger diligently went about amassing a reasonable point tally in the North East Division SCCA Formula B standings of 1967 in our 6653 chassis.

http://www.oldracing.../fb/1967/nediv/

#258 SJ Lambert

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Posted Yesterday, 09:41

Bright work is bright again for 6653

image.jpg

#259 SJ Lambert

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Posted Yesterday, 10:17

A close inspection of 6653's steering rack reveals it to be a "quick rack", we'd assumed it was a standard one as it's in a steel body, it's insides contain the magnesium bearings & all the good stuff. Most of the quick racks were in magnesium bodies.

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#260 Ray Bell

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Posted Yesterday, 12:03

The prototype, perhaps?

Or was Garrie on an economy drive?

#261 SJ Lambert

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Posted Yesterday, 17:36

Likely a prototype, the first magnesium body was made from " bar stock", then after that they were cast off a pattern.

#262 GMACKIE

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Posted Yesterday, 20:50

Bright work is bright again for 6653

image.jpg

Hope it has all been heat-treated....don't want any 'hydrogen embrittlement'.



#263 SJ Lambert

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Posted Yesterday, 23:13

That would be a disaster! Fingers crossed that it's been done right!!!!