RE: SER1 1595 engine, ignition

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Dear Simon Dewing and Jon Hutchings,

Many thanks for your data (Simon) and your warning (Jon).

To be honest I don't fully understand what Jon is warning for.

A higher Ron number means, a far as I always understood, more difficult to
ignite and less spontaneous burning (pinking). Do you mean (Jon) that
burning a higher RON, you could easily advance the ignition to the point
that it harms the engine, without signs of pinking? Or do I understand it
wrong?

Please to hear from you.

Best Regards

Paul Rasch
The Netherlands
1950 80” Land Rover
1966 Morris Traveller Paul Rasch




-----Oorspronkelijk bericht-----
Van: series1-host@xxxxxxxxx.xxx
[mailto:series1-host@xxxxxxxxx.xxx]Namens Jon Hutchings
Verzonden: vrijdag 15 april 2005 14:28
Aan: series1@xxxxxxxxx.xxx
Onderwerp: Re: SER1 1595 engine, ignition


One word of warning which applies if you are using the original dissy (
unlike Paul) , be careful about setting up to original spec.  In the my
1951 operations manual the setup  quoted is for something like 70-80
RON fuel not modern 95 + RON  .


Jon

On 15 Apr 2005, at 01:32, Simon Dewing wrote:

> Paul,
>
> I have a copy of a technical write up from "the Motor Trader" on 48-50
> Series Ones
>
> Ignition data is listed as :-
>
> Advance Range (Centrifugal) (Crank Deg)         36-40 deg
> Advance Starts (Crank rpm)                      1200-1600
> Max Advance (Crank rpm)                 4600
> Cam Angle (Open Period)                 41 +/- 4 deg
> Contact ring Spring Tension                     20-24 Oz
> Condenser Capacity                              .2 mf
> Firing point                            15 deg BTDC
> Firing Order                            1 3 4 2
> Contact Breaker Gap                             .012 in
> Plugs                                   Lodge HNLR
> Size                                    14 mm
> Gap                                     .023-.026 in
>
> If you pass the advance details to one of the distributor specialists
> they
> shoudl be able to "build to suit". I can't recollect any names used to
> get
> 25D's modified for hot mini's for rallying in my youth. I guess such a
> service is still available somewhere.
>
> A better bet may be to look out on e-bay, there have been several S!
> dizzys
> on in the last few months, or try some of the specialists Dunsfold may
> have
> something,
> if you want to go the second hand route try Stafford Dovey at Red
> Dragon
> Restorations (+44 15097 810058) or look through the adds in the Legend.
>
> Rgds
>
> Simon
>
> Message text written by INTERNET:series1@xxxxxxxxx.xxx
>>
> Dear Friends,
>
> Does anyone of you know about the required advance in ignition for the
> 1595CC LR engine?
>
> The engine I am currently rebuilding doesn’t have the original DVXH4A
> type
> distributor any more.
> Because I can’t get the original distributor, I need to stay with the
> later
> Lucas 25D type. As most Lucas distributors the maximum advance and the
> curve
> in which the advance occurs, can be tuned. It is the result of the cam
> and
> springs used. You will find an excellent article explaining this at:
> www.teglerizer.com/mgstuff/lucastuning.pdf
>
> The question is what advance in what curve does the 1595cc engine
> require?
> The only data I can find is in the workshop manual: static advance of
> 15
> degree (page A-12, Operation A/64, distributor and ignition timing).
>
> The current Lucas 25D on my 1595CC engine comes from an 1100 CC
> A-engine
> used in mini’s, build somewhere in the ’60.
> According to the used components it gives a maximum advance of 32
> degrees.
> Which, in combination with the static 15 degrees comes on a maximum of
> 47
> degrees before TDC. To me this seems rather much. But I am not sure.
>
> Retuning the Lucas distributor is rather simple
>
> Do you have a clue or further information?
>
> I will be pleased to hear from you.
>
> Paul Rasch
> The Netherlands
> 1950 80” Land Rover
> 1966 Morris Traveller
>
> If you are interested, you will find recent posted pictures
> dismantling the
> land Rover on the Series One Garage website.
>
>
>
> To change subscription see www.landrover.net/series1/mail
>
>
>
>
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> Subject: SER1 1595 engine, ignition
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