Designing an 8 port as a bit of fun...

General Chat with an emphasis on BMC Minis & Other iconic cars of the 1960's. Includes information on MK1 Action days.
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jetblick
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Re: Designing an 8 port as a bit of fun...

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mk1
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Re: Designing an 8 port as a bit of fun...

Post by mk1 »

Now you can see how it machined up, the casting is incredibly clean when you consider how few were cast up!

I am however relieved to see that there was one small cock up during the machining, goes to show that you aren't completely infallible :)

Thank you for the latest update.
Mark F
I'm a rather fat feathery Owl called sage.

wantafaster1
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Re: Designing an 8 port as a bit of fun...

Post by wantafaster1 »

This really is terrific stuff, great insight into it all.

Trog
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Re: Designing an 8 port as a bit of fun...

Post by Trog »

Chapter 6 “Yes Charlie”

So pretty much up to date now, from my machinist the head went to Reflex Engineering here in Campbellfield where Glen fitted the guides, exhaust seats and cut the inlet seats. He also welded up the hole! I was assuming that brazing would be the way to go but Glen suggested spray welding which is his normal method for repairing iron heads. I was happy to be guided by his (far greater) experience and it has come out well.

Got to say I was really impressed, Glen took the time to get everything perfect, even using another 1275 head he had “on the shelf” to check everything. Only issue we had was that the inlet ports were a smidge too large for the 35 mm. valves: I was over optimistic on my casting accuracy, so I am currently waiting for some 37 mm. valves from Minispares. I am a bit concerned that with the down draft inlets and 37mm. valves that I am over ported compared to the 29 mm. exhaust valves, but we will have to see.
From Reflex all I had to do was mask and paint, having spent far too long thinking about the best colour for it! And then the first full dry build, as shown in the early pictures in this post.

So that’s where I am now, I have one complete head and one casting, I have all the engine management sorted, including a complete homemade engine harness:
Engine Harness.jpg
Gearbox is also sorted and the Mini itself is 95% complete; just need a new set of brake hoses as the UK ones are not “ADR” compliant. For the engine I need to build up a bottom end.

And this is where things will have to stop for a while! Originally I wasn’t going to share anything until I had a running vehicle, largely due to the negativity I have received in the past. But “family” circumstances mean that I will not be able to put any more money into this project for some time, and to be honest I wanted to share what I had done as I was pretty chuffed with how it had turned out! I will keep adding updates with any small things I do; like the crank position sensor etc. but it may be sometime before we see it running.

In the mean time thanks for all your support and encouragement, it’s much appreciated.
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mk1
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Re: Designing an 8 port as a bit of fun...

Post by mk1 »

Hi Trog,

Thanks for your last update for the moment.

It has been marvellous to read the story of your one off injection head.

Family will always come first but I hope that you manage to fit a bit of Mini-ing in with your other commitments, but I appreciate it can't be a priority.

As I say on so many interesting threads like yours.

Thanks for sharing.

Mark F
Mark F
I'm a rather fat feathery Owl called sage.

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mab01uk
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Re: Designing an 8 port as a bit of fun...

Post by mab01uk »

Many thanks for sharing your 8 port head project with us, Trog and look forward to further updates in the future.

1071 S
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Re: Designing an 8 port as a bit of fun...

Post by 1071 S »

"....just need a new set of brake hoses as the UK ones are not “ADR” compliant. "

I'm sure you understand that brake hoses made to the appropriate British Standard (can't remember which one but MSpares sell them) are ADR qualified....

Unfortunately, Catch 22 states that, being ADR complaint, does not mean they are acceptable under State roadworthy regulations (in NSW) ..you may be luckier in Vic.

Cheers, Ian

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