41391 is listed in my Workshop manual as being the same as the 41234, for an
18V 779/780 which was non-North America Nov 73 to Sep 74.
41427 is not listed in my Workshop Manual or Haynes. 63 to 70 had a range
of distributors - 40897/41155, 40916 or 41339 depending on year and whether
the car was for North America or not. The engines were all 18G.
PaulH.
MG Cars Webring MG Site of the Month - September '99
http://freespace.virgin.net/paul.hunt1/
(or if that URL doesn't work try )
(http://194.168.54.52/paul.hunt1)
-----Original Message-----
From: Dodd, Kelvin <doddk@mossmotors.com>
Cc: mgs@autox.team.net <mgs@autox.team.net>
Date: 01 October 1999 17:09
Subject: RE: Distributor advance curves
>Tim:
>
> I did not catch this on the first round. I'm wondering why you were
>sold a 41391 dist. in the first place. Lucas does supply the 41427 dist.
>which is designed specifically for the 63-70 HS4 equipped MGB! They are
>stocked under Moss #143-110
>
> Dist. Vac. Adv. Vac. Rating
>Manifold Cent. Adv.
>Replacement 41427 54424170 5.13.10 PORT
>10 deg
>
>
> I don't recognise the 41391, it is not listed in the old Lucas Blue
>Book, so I have no idea what specs on it are. The 41427 should work fine
>for your application, the modifications you have made don't seem enough to
>warrant advancing the curve.
>
>Kelvin.
>
>>
>>
>>
>> Lucas # 40943 BMC # C-BHA 4415
>> 0 degrees dist adv @400 dist rpm
>> 8 degrees dist adv @ 1000 dist rpm
>> 12 degrees dist adv @ 3200 dist rpm
>> > note dist not engine in above spec
>> >
>> > doug -59 twin cam
>> >
>> > In case anyone's wondering why I want it, I have a 66 B,
>> recently replaced
>> > the distributor (flogged bearings) and opted for new rather
>> than rec'od. But
>> > got sold a 41391 - which apparently is all that is
>> available new now.
>> > Curve on this does not suit my engine (9.3:1CR, K&N's, mild
>> porting, mild
>> > cam) - pings under load. (Even with vaccuum advance disconnnected)
>> > I can get the 41391 recurved, but the bloke wants the curve
>> to work off. The
>> > 40943 was recommended for factory stage 3/4 engines - which
>> is about the
>> > same as mine. So it sounds like the correct thing.
>> >
>> > Thanx....
>> >
>> > Tim
>> > 66B YGHN3-3238
>> >
>> > "I don't suffer from insanity, I enjoy every minute of it"
>>
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