Author Topic: Holt 75 from Germany  (Read 18582 times)

Offline gbritnell

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Re: Holt 75 from Germany
« Reply #135 on: June 06, 2024, 12:34:01 PM »
I make my electrodes from music wire. I make the threaded bushing for the end and soft solder it together.  When the electrode wears I unscrew it from the insulator,  heat it up and pull it out a little then refit by grinding the gap back to size.
Talent unshared is talent wasted.

Offline michelko

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Re: Holt 75 from Germany
« Reply #136 on: June 26, 2024, 07:35:36 AM »
Hi guys,
made some progress on the exhaust. Same procedure as on the intake.
Still have to do some cosmetic to the header an soldering the pipe.

That fresh cut brass looks awesome

Regards Michael

Offline Admiral_dk

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Re: Holt 75 from Germany
« Reply #137 on: June 26, 2024, 08:59:43 AM »
Amazing result (again) - but how are they mounted onto the Engine ?

Per           :cheers:

Offline michelko

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Re: Holt 75 from Germany
« Reply #138 on: June 26, 2024, 09:14:29 AM »
Hi Per,
i hope the pics give you an idea. between the ports are 3mm Studs located. There will be a clamp that presses the manifolds onto the heads.

Michael

Online Vixen

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Re: Holt 75 from Germany
« Reply #139 on: June 26, 2024, 11:24:58 AM »
Hello Michael,

Those two manifolds look so good, a work of art.

Do you plan to bead blast them and then nickle plate them? That would really put the icing on the cake.   :thinking:

If you want, you could post them to me in the UK and I could do the bead blasting and nickle plating for you.

Cheers

Mike
It is the journey that matters, not the destination

Sometimes, it can be a long and winding road

Offline Admiral_dk

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Re: Holt 75 from Germany
« Reply #140 on: June 26, 2024, 05:06:54 PM »
Thank you for eplaining and showing  :ThumbsUp:

I feld suspicious about the 'curves for the Studs' and thought about bolts - but I didn't guess right after all ....

Per      :cheers:

Offline michelko

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Re: Holt 75 from Germany
« Reply #141 on: June 26, 2024, 06:14:22 PM »
Hello Michael,

Those two manifolds look so good, a work of art.

Do you plan to bead blast them and then nickle plate them? That would really put the icing on the cake.   :thinking:

If you want, you could post them to me in the UK and I could do the bead blasting and nickle plating for you.

Cheers

Mike

Hi Mike ,
many thanks for this generous offer.
This community is realy awesome :cheers:
But i think i will blacken those manifolds.
Think i will try this Pprodukt: https://www.bengs-modellbau.de/magazin/tutorial/schwarzbeize-bruenirbeize-schwefelleber-messing/
Also some other parts like the heads and the cylinders.

Regards Michael


Online Vixen

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Re: Holt 75 from Germany
« Reply #142 on: June 26, 2024, 06:22:12 PM »
Hello Michael

Yes, Black manifolds will look very good as well.  :ThumbsUp: :ThumbsUp:

Mike
It is the journey that matters, not the destination

Sometimes, it can be a long and winding road

Offline michelko

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Re: Holt 75 from Germany
« Reply #143 on: June 30, 2024, 12:00:08 PM »
so the exhaust manifold is ready. After some hours of filing and sanding it came out great.

I will buy some brass blackening stuff to hide the brass colour.

Michael

Offline gbritnell

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Re: Holt 75 from Germany
« Reply #144 on: June 30, 2024, 12:21:59 PM »
Looks absolutely beautiful!
Talent unshared is talent wasted.

Offline Admiral_dk

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Re: Holt 75 from Germany
« Reply #145 on: June 30, 2024, 03:52:20 PM »
A result to be proud of  :praise2:

Per      :cheers:

Offline michelko

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Re: Holt 75 from Germany
« Reply #146 on: July 03, 2024, 03:31:32 PM »
Hi guys,
another part ready.
I made the starter clutch for use with an cordless drill.
It has an one way bearing in it for easy release after the engine is started.

Michael

Offline michelko

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Re: Holt 75 from Germany
« Reply #147 on: July 03, 2024, 03:33:08 PM »
and here is a short video
<a href="https://www.youtube.com/watch?v=gAlIUoWENRU" target="_blank">http://www.youtube.com/watch?v=gAlIUoWENRU</a>

Offline Roger B

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Re: Holt 75 from Germany
« Reply #148 on: July 07, 2024, 08:52:31 AM »
Great to see it assembled and turning  :praise2:  :praise2:  :wine1:
Best regards

Roger

Offline michelko

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Re: Holt 75 from Germany
« Reply #149 on: July 13, 2024, 07:36:59 PM »
Hi guys,
today was a very productive day.
I did the flanges for the cooling system, made an adapter for the carburator, did the distributor cap and the distributor finger.
Unfortunatly i forgot to make some pics.

After i finished the parts i Could not resist todo a quick and dirty test run.

Its unbelievable , it started immediatly.

<a href="https://www.youtube.com/watch?v=HixujVBwZCA" target="_blank">http://www.youtube.com/watch?v=HixujVBwZCA</a>

I am proud like hell

While turn it over by hand i noticed its willing to start so tested the hand start.

<a href="https://www.youtube.com/watch?v=PBzknTpvS9M" target="_blank">http://www.youtube.com/watch?v=PBzknTpvS9M</a>

Because of the missing cooling system this little bastard has only a couple of seconds run time.

RegardsMichael

 

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