[Healeys] NOS 100/4 block?

[greylinn at ozemail.com.au]

John Chatham built a 100 rally car using a diesel block. Shorter stroke so higher revving, but a lot of modification need to make a petrol motor out of it (not least a distributor!)   http://www.acmefluid.com.au/larry/chatham.html

 

Peter Linn

Brisbane

100 BN1 Holden (Buick) V6

 

From: Healeys <healeys-bounces at autox.team.net> On Behalf Of David Nock via Healeys
Sent: Thursday, 27 August 2020 7:16 AM
To: Ray Juncal <healeyray at yahoo.com>; Ulla &Sven Ordell <bispmotala at hotmail.com>; John Harper <ah100register at gmail.com>
Cc: healeys at autox.team.net
Subject: Re: [Healeys] NOS 100/4 block?

 

I have a diesel motor here stripped. I thought that they were the same but the timing chain is a triple link chain so the snout on the front of the crank is about 1” longer than the gas motors.

 

 

David Nock
healeydoc at sbcglobal.net <mailto:healeydoc at sbcglobal.net> 
209 948 8767
www.britishcarspecialists.com <http://www.britishcarspecialists.com> 

Help us have our Founder Norman Nock inducteed into the 
British Sportscar Hall of Fame, You can vote for your favorites 
by visiting the site at.
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From: Ray Juncal via Healeys 

Sent: Wednesday, August 26, 2020 1:18 PM

To: Ulla &Sven Ordell ; John Harper 

Cc: healeys at autox.team.net <mailto:healeys at autox.team.net>  

Subject: Re: [Healeys] NOS 100/4 block?

 

If it is the diesel block it will have the heavy duty crank shaft a valuable part by itself if I remember correctly.

 

On Wednesday, August 26, 2020, 9:55:38 AM PDT, John Harper via Healeys <healeys at autox.team.net <mailto:healeys at autox.team.net> > wrote: 

 

 

Ulla 

 

The A90 Atlantic 2.6 litre 4 cylinder is basically the same. The only difference is that the A-H has a 2 bolt distributor fitting whereas the A90 has one. This however is a bit of a simplification because there was a small amount of overlap with early 100 having blocks with only one fixing bolt and very late A90s having two. To make this more complicated if it were BMC Gold seal replacement engines. These could be delivered with either one bolt or two. It is possible to fit a A-H distributor to a single bolt version but the mounting plate has to be from an A90.

 

All other 2.2 and 2.5 litre blocks have different bores so this can be measured fairly easily. Another point is that later blocks had different fittings such as the push rods.

 

Another possible different version was from a diesel block as fitted to London Taxis etc.

 

On Wed, 26 Aug 2020 at 14:21, Ulla &Sven Ordell via Healeys <healeys at autox.team.net <mailto:healeys at autox.team.net> > wrote:

Friends !

 

A mate has asked me for help. He has been offered what appears to be a NOS 100/4 block, nice, but two questions has come up.

1 How do I tell if it is a genuine 100/4 block or one from any other Austin/BMC with the same basic engine, and 2 any guidance on price tag?

Any guidance thankfully accepted.

 

Best regards 

Sven

Ex BJ8 now “only” MMM M.G.s

 

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-- 

Best wishes 

 

John Harper

 

AHC UK 100 Register Secretary

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