13 replies to this topic

[smbrm]

When the Cosworth DFV was launched the engine electrics were mounted on a tray at above the ZF gearbox.





After a few races all of these items disappeared into a box between the intake trumpets with just the coil poking out.

I've always wondered just what all these bits were and what was actually in the DFV control box.

Anyone have any insight as to what was in the DFV electrics box or what all the components were on the electrics tray of the original DFV installation.

cheers

[macoran]

When the Cosworth DFV was launched the engine electrics were mounted on a tray at above the ZF gearbox.





After a few races all of these items disappeared into a box between the intake trumpets with just the coil poking out.

I've always wondered just what all these bits were and what was actually in the DFV control box.

Anyone have any insight as to what was in the DFV electrics box or what all the components were on the electrics tray of the original DFV installation.

cheers

I have no idea.............but a question,,,,,,,,,,,,,where's that bit of drawing from ?

[smbrm]

I have no idea.............but a question,,,,,,,,,,,,,where's that bit of drawing from ?

The Allington Lotus 49 cutaway from the cutaway discussion thread. I just coloured the bits to differentiate them just in case someone out there can shed some light on the subject.

The red, pink and blue bits are the bits requiring clarification. The green bit is obviously the coil and the yellow is the opus electronic ignition.

I can't find any Lucas bits that look like the red part?

I am wondering what others think/know?

Edited by smbrm, 05 February 2010 - 22:18.

[JB Miltonian]

Mister Oliver's book on the 49 says about the early car: "The car's ignition system was mounted on a tray on top of the gearbox, alongside an early type of Lucas electronic rev limiter, designed to keep the engines from going above 9200 rpm." I would imagine that this rev limiter is one of the three mystery pieces.

[smbrm]

Mister Oliver's book on the 49 says about the early car: "The car's ignition system was mounted on a tray on top of the gearbox, alongside an early type of Lucas electronic rev limiter, designed to keep the engines from going above 9200 rpm." I would imagine that this rev limiter is one of the three mystery pieces.

My guess is that should be the blue bit!

[JB Miltonian]

Mr. Nye's story about dealing with the Opus box in R3 makes for amusing reading.

[RTH]

Blue bit is the electronic rev limiter. Red bit is the rectifier for the alternator.

[smbrm]

Blue bit is the electronic rev limiter. Red bit is the rectifier for the alternator.

Do you mean the red bit or the round pink bit is the rectifier for the alternator?

[bschenker]

The pink is rectifier, the red are resistors.

[Doug Nye]

The yellow finned bit is the heart of the matter, the celebrated spark box which in the case of R3 had deteriorated to the extent of being covered with microscopic cracks caused by the DFV's notoriously violent vibration, and filled with coppered carbon dust mixed with oil. When run up on a test rig in a darkened workshop the web of cracks filled with conductive material lit up like a scene from 'Back to the Future' - becoming a sparkling, dancing violet/pink/white/blue electrical shimmer, shorting out the ignition. A fresh, mint spark box was fitted to the engine - and hey presto, easy starting and clean running.

DCN

[smbrm]

The pink is rectifier, the red are resistors.

OK, that sounds clear, but what are the resisters for. They seem to be a pair of resistors and I have never seen Lucas resistors like this in pairs. I have seen separately before like this:

http://www.holden.co...esL/030_009.jpg

and do these resistors substitute for this part:

http://images.bpnort...om/47229_lg.jpg?

[bschenker]

The resistors stabilisé the current.

My english is not enoug to going in details.
I will see tomorow to find some thing writen on this resistors.

I found this on the net, I think here you can find the respons.
Lucas Opus

Edited by bschenker, 07 February 2010 - 18:30.

[smbrm]

The resistors stabilisé the current.

My english is not enoug to going in details.
I will see tomorow to find some thing writen on this resistors.

I found this on the net, I think here you can find the respons.
Lucas Opus

I agree those resisters are performing the same function. I just couldn't find any pictures of the double setup in the cutaway.

[bschenker]

On the bracket is writen "ENM 5295 12 65"

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