Bob, Pip, and List,
The first distributor that was tested on the analyzer was
DK4A 404 332 fitted with a 12 degree advanced plate that actually read 30
degree
on test.
550 dist. rpm. [1100 engine rpm.] 5 degree advanced.
565 10
600 15
675 20
700 30
Obviously, the plate and or weights and springs had been altered.
The second distributor that was tested,
DK4A 402 24B. 13 degree max on test.
410 dist. rpm. [820 engine rpm.] 5 degree advance.
1000 9
1400 13 degree max.
I know that the P Type's originally had,
Series number 400 186
Ordering number 404 424
Reference Lucas Cat. 1939.
My question now being, how to locate parts to bring these two distributors up
to the P specifications?
How critical have other owners been in identifying and testing the curve
factor on their engines?
As for Avgas? No.
Thanks for your input so far.
Brian Kelly.
n a message dated 09/10/2001 7:45:39 PM Central Daylight Time,
mgwizard@caloundra.net writes:
> You guys with distributor problems are just beginning to find all the fun.
>
> Firstly P's originally ran 20 degrees advance starting @ 2000 rpm & all
> gone by 4000.00. However, remember that today's fuels are all different.
>
> I hope the chap who is running 7.4 compression ratio is not using Avgas
> as that is a slow burning fuel & totally wrong for our cars. I have
> several original P-type distributors and graphs etc from Lucas so if
> numbers are needed I can assist. Again, I must point out that a second
> hand distributor is very likely to have been changed in more way than one
> in over 60 years of use. So be careful.
>
> Very similar distributor was used in some Hillmans.
>
> Good luck
>
> Pip Bucknell
> Australia
>
>
> "Robert Grunau" <cgrunau@pathcom.com>
> Sent by: owner-mg-mmm@autox.team.net
> 11.09.2001 08:59
> Please respond to "Robert Grunau"
>
>
> To: <Kellmg@aol.com>, <mg-mmm@autox.team.net>
> cc:
> Subject: RE: Distributor
> Hi Brian,
> You must supply the specific distributor part number, usually a 5 or 6
> digit
> number starting with 4 and possibly ending in a letter. The DK4A is only
> the
> model number. Hundreds of different distributors have this model number.
> I have a Lucas parts book which begins in 1939, your P type distributor
> may
> be listed and if so we can at least find the total advance and possibly
> some
> intermediate advances for various RPMs.
> Regards, Bob
>
>
> Hi Guys,
>
> Can anyone supply information regarding the curve of the DK4A Distributor?
>
> Recently, on the list, it was suggested that an 8 degree auto advance be
> fitted.
> What was the original advance on the P Type? I had mine on a "Sun
> Analyzer"
> and it was way over advanced. Are new shaft and action plates available in
> different degrees? Nothing mentioned in Dowley's catalogue.
>
> The compression ratio on mine has been raised to around 7.4 to 1.
> Any and all info. gratefully received.
>
> Brian Kelly.
> PS.
> As a matter of interest the DK4A signifies,
> D- distributor
> K- cast iron body with molded contact breaker base and die-cast auto
> advanced
> weights.
> 4- cylinders.
> A- auto advanced.
British Cars Web: http://www.team.net/sol
MMM list subscription info: http://www.team.net/cgi-bin/majorcool
|