On 18 Jul 2003 "Les Rose" wrote:

Those who have followed my posts will no doubt have sussed out that I'm
building a 998 for my Frogeye. Has anyone worked out how to fit an A+ Metro
distributor into a pre-A+ block? I have the different drive shaft and forked
retainer, which Vizard in his book says I need, but he says nothing about
what to do with them (being the polite soul that he is). The original dizzy
suffers points bounce at anything over 6,000.

AFAIK the difference is in the collar on the bottom of the shaft
that engages with the distributor drive shaft in the engine. The
A+ drive has wider slots in it so the corresponding lugs on the
dizzy are fatter. You can file them down to fit an A-series.

Richard

In article ,
Richard Porter wrote:
AFAIK the difference is in the collar on the bottom of the shaft
that engages with the distributor drive shaft in the engine. The
A+ drive has wider slots in it so the corresponding lugs on the
dizzy are fatter. You can file them down to fit an A-series.

Can't you just change the driveshaft from the cam?

--
*I don't suffer from insanity, I enjoy every minute of it *

Dave Plowman London SW 12
RIP Acorn

"Dave Plowman" wrote in message
...
In article ,
Richard Porter wrote:
AFAIK the difference is in the collar on the bottom of the shaft
that engages with the distributor drive shaft in the engine. The
A+ drive has wider slots in it so the corresponding lugs on the
dizzy are fatter. You can file them down to fit an A-series.

Can't you just change the driveshaft from the cam?

--
*I don't suffer from insanity, I enjoy every minute of it *

Dave Plowman London SW 12
RIP Acorn
Yes I have the A+ drive shaft so that's not the problem. The A+ block is
cast differently to cater for the forked retainer, so I'm wondering what's
the best way to adapt the A-series block

"Dave Plowman" wrote in message
...
In article ,
Richard Porter wrote:
AFAIK the difference is in the collar on the bottom of the shaft
that engages with the distributor drive shaft in the engine. The
A+ drive has wider slots in it so the corresponding lugs on the
dizzy are fatter. You can file them down to fit an A-series.

Can't you just change the driveshaft from the cam?


For what I remember of the A+ distributor the means of locking the unit's
body to the engine was different, the normal A series distrib' mounting
pinched in from the sides, the A+ clamped down from above IYSWIM - the drive
dog might well be different, but that is not the real problem AISI.

On 19 Jul 2003 "Les Rose" wrote:


"Dave Plowman" wrote:
Richard Porter wrote:
AFAIK the difference is in the collar on the bottom of the shaft
that engages with the distributor drive shaft in the engine. The
A+ drive has wider slots in it so the corresponding lugs on the
dizzy are fatter. You can file them down to fit an A-series.

Can't you just change the driveshaft from the cam?

Yes if it's the same but I wasn't sure about that.

Yes I have the A+ drive shaft so that's not the problem. The A+ block is
cast differently to cater for the forked retainer, so I'm wondering what's
the best way to adapt the A-series block

Why not buy the right distributor? I got one recently for £25 at a show
- new bankrupt stock. Alternatively just use the A-series clamp and
retain the existing flange.

Richard

"Richard Porter" wrote in message
...
snip

Why not buy the right distributor? I got one recently for £25 at a show
- new bankrupt stock. Alternatively just use the A-series clamp and
retain the existing flange.


Because he says that the original is unsuitable for his 'tuned' engine and
secondly the body of the distributor at the clamping point is different and
thus the two types of locking clamp / pinch plate can't be exchanged with
each other.