BBM Holden Rotary valve Special
Posted 22 January 2004 - 05:35
Searches on this BB and elsewhere have failed to provide any further information.
From the name one would assume this vehicle used a modified Holden 'grey' motor fitted with a special or modified rotary valve cylinder head. Does anyone know anything further about this - was it a specially produced or modified head, and who produced the componentry??
Did the car have much in the way of a competition history, or was it as 'successful' as the later (1990) Life W12 rotary valve F1 car?
Posted 22 January 2004 - 07:18
AFAIK the Dunstan rotary-valve engine first ran in Murray Trenberth’s ex-F2 Alta at Port Wakefield, SA, in 1958. The car retired with clutch trouble early on, and I don’t think Trenberth raced it in this form again.
In 1959 Bakewell Bridge Motors built a new special for TR2 driver Dansie, which first appeared at the 10 October Wakefield meeting that year, with a supercharged version of the Dunstan rotary-valve engine. Dansie raced the BBM at Wakefield meetings throughout 1960, blowing up the engine at the Easter meeting but taking fourth place in the feature race (against other SA entries) in June.
By December however he had given up and replaced the engine with a supercharged non-rotary Holden.
I wonder if he really did revert to the rotary in 1961?
Posted 22 January 2004 - 08:33
Posted 22 January 2004 - 11:45
This story was written before the engine failures (detailed in Davids post) later in the year.
At the time of the article the people behind the project were confident that the future of the rotary valve head looked bright.
While I have not checked it , I tend to agree with David that the rotary head design was discarded at the end of 1960.
I can forward GeoffR a photocopy of the article if required.- PM your address.
Posted 22 January 2004 - 12:16
Posted 23 January 2004 - 02:09
They were called the Armstrong goers, and they were both hard triers, but the interesting thing is that Robert's car was fitted, for a time with a rotary valve head, obviously a refugee from the South Australian effort. I remember looking under the bonnet of the FE but can't really remember any details except that the engine used to rev like hell but was very peaky--- I wonder what happened to the head after its speedway days were over.
Posted 23 January 2004 - 22:07
Posted 24 January 2004 - 03:09
Graham Howard did an article on the Dud Dansie car in Motor Racing Australia... I would think that about 18 months ago.
And I think there were several of the heads built, but it all comes out in the story when you find it.
Posted 26 January 2004 - 21:25
Thanks very much for the info.
Posted 02 April 2006 - 12:24
I read a thread that was posted in 2004 about the Dud Dansie BBM 1. In that thred it was stated Graham Howard wrote an article on the car in Motor Racing Australia in about 2002 or 2003. I wonder if any one is able to tell me the actual issue of the magazine.
Thanks in anticipation.
Posted 03 April 2006 - 01:44
Posted 03 April 2006 - 08:50
Posted 03 April 2006 - 21:17
I don't think it was run as historic at that time! Jim bought it to run instead of an MGA Twin Cam (his road car come racing car!) and ran it for a year or so before upgrading to a Lotus 7. During jim's ownership it aquired a Borgward swing axle rear end to replace the double wishbone set up (with Holden diff) to improve the handling (think that the sliding splines on the drive shafts used to lock up causing the handling problems). In Jim's time it always had a 'normal' grey motor.
By the way it was supposedly 'Bakewell Bridge Motors' not 'Bloody Big Monster'. Article in Sports Car World had it that Dud Dansie took up motor racing because his doctor told him to take up a hobby otherwise he would have a heart attack.
The second BBM had a supercharged Mercedes motor in the back - last I remember seeing it was some 10 years ago in a historic event at Mallala.
Posted 07 April 2006 - 12:58
BTW, the BBM 2 initially ran a supercharged holden motor installed in the rear of the car laying somewhat on it side (the engine that is) - inclined at about 40 degrees. I think it also ran a Repco Head after this and eventually the Mercedes engine. Last I knew of the car it was sold to NZ.
If interested there is a nice article in Sports Car World Sept 1963.