250 TDF vs 250 SWB

Late tipo 539 comp cars have 90 mm tubes for increased rigidity. Best wishes, Kare

 

and which late 539 chassis/car has such 90mm tubes-I'm fascinated, and by all means, i'm ALL ears..this would require an entire new jig be made by gilco, AND a complete retooling of the "swiss" machine referred to by nfactory machinists as the: "sip -chik" jig boring machine...(its spelled phonetically!!!), neither easy, nor inexpensive....539 was not a big run affair in term of apps and uses....no?
PM me if you prefer...(techno babble bores most readers)
I have been using go-no go oak radius guages as an immediate frame check during a number of pre-inspection surveys prior to entering into purchse contracts...since 1978

Are you familiar with the peculiarities of the 80mm tubes used in SEFAC swb chassis?
Only during repair of extensive racing crash was I shown this interesting factoid-twice, i might add...The English use the phrase; "....main tubes, forks, and stays"

drop me a line, you seem to have some technical knowledgr, lets chat...

 

PM sent. I'm guessing 280 hp engines proved to be too much for standard frame so they used heavier tube. Even if I have a M.Sc. specializing in manufacturing technology (foundry, materials and machine shop) I am not very familiar with techniques used to produce a tube frame. Would tend to think that modifying tools so that larger tube could be used, would not necessarily be that hard...

 

Here's a very interesting car. One of the very first 2 cars that were imported together into the UK by Colonel Ronnie Hoare to form Maranello Concessionaires. Ferrari 250 GT SWB Berlinetta RHD s/n 1993GT. The other one was the same model with s/n 1995GT. This one, apparently with competition specifications but a steel body. Described by Jess Pourret as a Semi Comp. It's a beautiful car.


Barchetta.cc info on 1993GT: http://www.barchetta.cc/english/all.ferraris/detail/1993gt.250gt.htm

[ame]http://www.youtube.com/watch?v=7TMS3fvQJY4[/ame]

 

Barchetta.cc info 1917GT: http://www.barchetta.cc/english/all.ferraris/detail/1917gt.250gt.htm

[ame]http://www.youtube.com/watch?v=jArXBCjxtPo&feature=related[/ame]

 

Out of interest what problems are you referring to?

 

2 pictures of 250 GT LWB Interim cars that were competing at Le Mans 1959 plus a pic of a TdF taken somewhere around Le Mans. All pictures copyright John Hendy.

http://mydadsphotos.shendy.co.uk/motorsport/european-motorsport/le-mans-1959/t_a008_03-2/

http://mydadsphotos.shendy.co.uk/motorsport/european-motorsport/le-mans-1959/bw_b008_26/

http://mydadsphotos.shendy.co.uk/motorsport/european-motorsport/le-mans-1959/bw_b008_08/

Le Mans 1961. 2735GT Hill/Moss (18) and 2731GT (20) in qualifying plus 2731GT in the race.

http://mydadsphotos.shendy.co.uk/motorsport/european-motorsport/le-mans-1961/bw_b032_16-2/

http://mydadsphotos.shendy.co.uk/motorsport/european-motorsport/le-mans-1961/bw_b036_10-2/

Empre Trophy Silverstone 1961.

2735GT (Moss). http://mydadsphotos.shendy.co.uk/motorsport/british-motorsport/silverstone/empire-trophy-1961/bw_b040_34/

http://mydadsphotos.shendy.co.uk/motorsport/british-motorsport/silverstone/empire-trophy-1961/bw_b040_35/

Nurburgring 1962.

http://mydadsphotos.shendy.co.uk/motorsport/european-motorsport/nurburgring-1962/bw_c011_15/

 

[ame]http://www.youtube.com/watch?v=VRtYrnvkUO4[/ame]

[ame]http://www.youtube.com/watch?v=vOiPE6s0h7w&feature=related[/ame]

[ame]http://www.youtube.com/watch?v=BlQuwyWWL48&feature=related[/ame]

SEFAC Hot Rod 2845GT. Barchetta.cc info: http://www.barchetta.cc/english/all.ferraris/detail/2845gt.250gt.htm

[ame]http://www.youtube.com/watch?v=8bJfhDClFaQ[/ame]

 

[ame]http://www.youtube.com/watch?v=sFokw4WK6cw&feature=context-vrec[/ame]

 

Rear window in particular seems to be little too low making the car too flat in appearance. When one of the main elements is not what it should be it gets very difficult to analyse the rest in a photo as anything can be judged to be right or wrong depending on which main element you compare to.

SWB is a true masterpiece putting a relatively tall cabin into a very tiny car and maintaining perfect balance. Very hard to get it right.

 

Here's a nice one from Goodwood last weekend:

[ame]http://www.youtube.com/watch?v=AFES9oRIFXw[/ame]

Sorry for the lousy quality (iPhone), and the engine noise is totally dwarfed by the Silver Arrow warming up in the background. Darn, the Revival was cool

 

Car is in the Sold section of the site. http://www.talacrest.com/stockdetails.asp?stockID=136

 

Not having had what must be the most fabulous experience of driving a 275GTB/4 or a 250 GT SWB Berlinetta, I can only imagine that the lightness of the 250 SWB would give a different driving experience and play a major role in the excitement, responsiveness and dynamics provided, and more so in the case of an alloy bodied car, in varying degrees depending on the state of tune of the engine and suspension set up??? Some of the 'dramatic' sound you speak of could be provided by the induction roar of the 6 double choke downdraught Webers of the 275 GTB/4 rather than the 3 on most 250 SWBs??? For 1961 some of the Competizione cars had larger valves and huge 46DCL Webers which would undoubtedly even things up in the 'drama' department, though at some considerable extra cost as you know.

 

Just looked in the book, Ferrari, The Red Dream by Doug Nye and it gives the weights below:

250GT SWB Alloy - 960 KG.

250 GT SWB Steel - 1100 KG.

275 GTB -GTB/C - 1100 KG.

Supercars dot net gives the weight of a 275 GTB/4 as 1100 KG.

So I don't know what I'm talking about, LOL. I'm sorry about that. Perhaps the 4 cams make a difference too?

Some of the 250GT SWB Competizione cars from 1961, the SEFAC Hot Rods, had nearly 300 BHP with Testa Rossa spec engines.

 

Not a very hot engine in that SWB of yours. A standard GTE should go upto 7000 with air cleaners installed.

 

http://www.ferrarichat.com/velostrada/issues/200508/Niles_Best_of_Cars.htm

And another.

http://www.ferrarichat.com/velostrada/issues/200510/Niles_2733GT.htm

 

Thanks much tongascrew

 

Hi I wish more owners would come up with stories like this. It adds another dimension to the history of a car. Thanks much tongascrew

 

Regarding the difference in weight of a Steel 250 SWB and Steel 275 GTB/4, DWR46 on this site has very kindly given us accurate figures having weighed the cars himself. Figures for both cars measured with toolkit, spare tyre and no fuel.

Steel 250 SWB - 2575 pounds = 1168 KG

Steel 275 GTB/4 - 2865 pounds = 1299.5 KG.

So there is a 290 pound or 131.5 KG difference.

 

2008 Auction.

[ame]http://www.youtube.com/watch?v=RBhHnngIyfo&playnext=1&list=PLD85A56077FDFA4FA&feature=results_main[/ame]

 

I was at Salon Prive and I voted for the 250 GT swb Berlinetta pictured for the 'People's Choice' award.
It was this 275, however that was awarded with that accolade.
The 250 was named 'Most Elegant Car'

Paul
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The 275 also won the best closed sports car of the swinging sixties.The 275 GTB to my eyes has elements of the 250 GTO '64, especially from the side. Closed headlamps are stunning.

Salon Prive 2012 Winners: http://www.salonprivelondon.com/concours/2012winners.asp