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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