Bugatti Typ 50 1/4 Scale model

[michelko]

Hello,
the new plugs are ready and i was able to run the engine quite a bit.
The plugs works nice .. almost.
Think there are 2 or 3 cylinders missing.

Here are the Videos:

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

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

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

Michael

[Roger B]

Sounds excellent    The new design of plug has a much better tracking length on the insulators.

[fumopuc]

A really excellent sound. You should be very proud of what is made there.

[Vixen]

Beautiful work Michael. The Bugatti sounds great.
Can you use a infra-red/laser thermometer to measure the temperature of each exhaust port to see if any cylinders are misfiring?
I bought mine from that web auction site and it is very easy to use to detect a bad running cylinder.

Mike

[michelko]

Used my fingertip as thermometer. Most ports  hurt some dont .

Michael

[Vixen]

Hello Michael
A fingertip thermometer Must be the earliest example of a 'digital' thermometer
Low cost and low tech but it will tell you which cylinders are not working well.

Ouch, ouch, ouch, uhh, ouch, ouch, uhh, ouch.       Must be 4 and 7 which are missfiring

Mike

[michelko]

Hello Michael
A fingertip thermometer Must be the earliest example of a 'digital' thermometer
Low cost and low tech but it will tell you which cylinders are not working well.

Ouch, ouch, ouch, uhh, ouch, ouch, uhh, ouch.       Must be 4 and 7 which are missfiring

Mike

[90LX_Notch]

Hell yeah, it's getting there Michael.  Awsome work.

-Bob

[michelko]

hi,
i took out all plugs and gave the a cleaning with brakecleaner and pressured air.
one plug is defetive it has a resitance between the electrode and the Body of 2,7 Ohm. Don´t know what went wrong with that plug.
Other Pplugs had infinite Resitiance like expected.
 I took the best of the first run plugs and did a new testrun of the engine.
Man this Thing is screaming like hell.

Blue smoke also nearly went away.

Next step is to make some headers and an exhaust System

<a href="https://www.youtube.com/watch?v=UkAVwrHT6ao" target="_blank">http://www.youtube.com/watch?v=UkAVwrHT6ao</a>

Michael

[Vixen]

Hello Michael

Herzlichen Glückwunsch zu deiner Leistung

Congratulations, I am really pleased for you.
You have got your miniature engine  to run and sound like a full size Bugatti engine, with the authentic ripping calico sound to the exhaust note.
Full of admiration of your achievement

Cheers

Mike

[crueby]

That is spectacular! Congratulations!

[Vixen]

Hello Michael

Replies #108 and #109 may be relevant to the spark plug failure. Ignition voltages are more searching than low voltages

Regards

Mike

[michelko]

Hello,
think ist time to go on with the build Report.
August 2016 i made the sideplates.
Engraved the logo drilled endless holes

I also worked on the cam shaft/Distributor gear. Drilled a hole for the pin that the gear is not rotating.

Dis some test runs of the camschaft lifter Setup in the lathe.

[michelko]

Oktober 2016
Did some engraving work on the Pistons and the camshaft bearings.
In case of an dismanteling the engine the parts will find their place easy.

Also made the Pistonring from casted iron. For the heat Treatment i fabricated a Setup that holds the gap open.
The logos on the side plates where laid out with read enamel and the other faces where scraped.

[Vixen]

Michael
The engraving and surface scrapeing are a work of art in their own right. I am sure Etore himself would have approved.

the 1930's is my favourite era for racing car engines and the Bugatti is one of my favorite engines.

Mike