Fullauto Technologies cylinder heads

oldmikew · Aug 3, 2018

SteveA said:
That was what the last discussion on this topic concluded!

Well according to the Norvil website they are unmachined castings ...

oldmikew · Aug 3, 2018

Madnorton said:
Not really, just need to find a modern foundry, they are there just need to ask the right people as most don't advertise if they don't need to, or want visitors nosing about.

So we can look forward to AN taking over from FullAuto ?

Fast Eddie · Aug 3, 2018

oldmikew said:
Well according to the Norvil website they are unmachined castings ...

Yes, but why were they unmachined in the first place?

The hypothesis was, they were probably scrapped for some reason, and intended to be put back into the system and re melted. But some ‘enterprising’ individual thought otherwise.

I guess we’ll never know for sure, but I personally think that’s the most likely scenario.

It happens a lot in foundries, castings get rejected for all sorts of reasons, and provided they’re rejected before any machining is done on them, there is not much cost loss. So it’s often not a high priority for management (wrongly so, but that’s another topic).

oldmikew · Aug 3, 2018

Fast Eddie said:
Yes, but why were they unmachined in the first place?

The hypothesis was, they were probably scrapped for some reason, and intended to be put back into the system and re melted. But some ‘enterprising’ individual thought otherwise.

I guess we’ll never know for sure, but I personally think that’s the most likely scenario.

It happens a lot in foundries, castings get rejected for all sorts of reasons, and provided they’re rejected before any machining is done on them, there is not much cost loss. So it’s often not a high priority for management (wrongly so, but that’s another topic).

Nigel you could well be right ... but it seems odd that a batch of 750 and 850 rejected castings have been stashed away to suddenly reappear almost some 50 years later. That takes forsight .

I dont have an earlier cylinder head to compare ,but the RM1 fitted to mine I would have thought was sand cast , one wonders whether this was so back in Dominator and Bracebridge Streets days? Certainly such a complex mould calling for a split pattern and possibly 5 cores would take a lot of skilled and expensive time to set up so every incentive not to throw failures back in the pot.

But isnt the suggestion they are coming from a foundry in Stoke?

Fast Eddie · Aug 3, 2018

I really don’t know Mike. Maybe you’re right and they are all new. But as you say, it’s a big undertaking given the complexity.

It’d be a travesty to go to such trouble and cock it up along the way somehow.

Let’s hope he hasn’t...

Fullauto · Aug 3, 2018

oldmikew said:
Well according to the Norvil website they are unmachined castings ...

Many years ago, he got hold of all the old heads which were wrongly machined and had tooling broken off in them. These are his "new" heads. No two are machined the same.

Fullauto · Aug 3, 2018

oldmikew said:
So we can look forward to AN taking over from FullAuto ?

What can I say, except, the way they have treated me, that would be a resounding "over my dead body".

Fullauto · Aug 3, 2018

oldmikew said:
Nigel you could well be right ... but it seems odd that a batch of 750 and 850 rejected castings have been stashed away to suddenly reappear almost some 50 years later. That takes forsight .

I dont have an earlier cylinder head to compare ,but the RM1 fitted to mine I would have thought was sand cast , one wonders whether this was so back in Dominator and Bracebridge Streets days? Certainly such a complex mould calling for a split pattern and possibly 5 cores would take a lot of skilled and expensive time to set up so every incentive not to throw failures back in the pot.

But isnt the suggestion they are coming from a foundry in Stoke?

5 cores !!!! Try 17 cores.

Fast Eddie · Aug 3, 2018

Fullauto said:
5 cores !!!! Try 17 cores.

Strewth !

oldmikew · Aug 4, 2018

Fullauto said:
What can I say, except, the way they have treated me, that would be a resounding "over my dead body".

Understood... If there was a barb in my comment it certainly wasnt aimed at you but at the assumption it would be an easy matter to find a foundry in the UK . !7 cores you say ? Blimey ! The person I would have liked to ask about this is sadly recently dead. When still an apprentice he made all the patterns for the Ferguason tractor.

oldmikew · Aug 4, 2018

Fast Eddie said:
Strewth !

plus more than 1- I should think

Fullauto Technologies cylinder heads

Similar threads