Author Topic: Bugatti Typ 50 1/4 Scale model  (Read 45098 times)

Offline 90LX_Notch

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Re: Bugatti Typ 50 1/4 Scale model
« Reply #15 on: February 03, 2017, 06:13:54 PM »
Great stuff Michael!  I love four cycle builds.

-Bob
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My Engine Videos on YouTube-
http://www.youtube.com/user/Notch90usa/videos

Offline fumopuc

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Re: Bugatti Typ 50 1/4 Scale model
« Reply #16 on: February 03, 2017, 07:09:27 PM »
Hi Michael, very impressive. Is it right that you have incressed the stiffness of your mill by an additional frame around the column ?
Kind Regards
Achim

Offline michelko

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Re: Bugatti Typ 50 1/4 Scale model
« Reply #17 on: February 03, 2017, 07:40:36 PM »
Hi Michael, very impressive. Is it right that you have incressed the stiffness of your mill by an additional frame around the column ?

Yes thats right. This was a lasercut set from heinz auracher its called hüfthalter.
At this pictures i testfitted the parts. Menwhile the parts are scewed to the column, welded together and painted.

Michael

Offline michelko

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Re: Bugatti Typ 50 1/4 Scale model
« Reply #18 on: February 03, 2017, 07:43:19 PM »
As delivered

Offline keith5700

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Re: Bugatti Typ 50 1/4 Scale model
« Reply #19 on: February 03, 2017, 09:10:21 PM »
Michael, which ecu are you using?
How long are your ht leads?
Have you got any resistive wire in your ht lead runs?
Are you losing comms with Tunerstudio at any time?
Have you done a live display of the trigger wheel whilst running, or trying to run?
Are you using coil packs with wasted spark, or individual coils and running full sequential spark?
What's the spark advance when starting and at low rpm?
Have you ran it in the dark to look for leaking ht sparking?
What spark plugs are you using?
Sorry if I've missed any of this info in the thread.
Keith.

Offline Roger B

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Re: Bugatti Typ 50 1/4 Scale model
« Reply #20 on: February 04, 2017, 07:39:29 AM »
An excellent build  :praise2:  :praise2: I will be following along  :wine1:

What are you using for fuel feed at the moment, a carburettor?
Best regards

Roger

Offline michelko

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Re: Bugatti Typ 50 1/4 Scale model
« Reply #21 on: February 04, 2017, 02:50:10 PM »
Michael, which ecu are you using?
How long are your ht leads?
Have you got any resistive wire in your ht lead runs?
Are you losing comms with Tunerstudio at any time?
Have you done a live display of the trigger wheel whilst running, or trying to run?
Are you using coil packs with wasted spark, or individual coils and running full sequential spark?
What's the spark advance when starting and at low rpm?
Have you ran it in the dark to look for leaking ht sparking?
What spark plugs are you using?
Sorry if I've missed any of this info in the thread.
Keith.
Hello keith thanks for your reply.
i am using a arduino based ecu called speeduino
Ht leads are ca. 60cm
Added 4,7kohm resistror in every ht lead, since that no more connection loss or freezing
Yes, the signal is clean and nice until i conect the coil paks to 12 v
I am using a hallsensor with magnets as mising tooth 12-1
Two vag Coil paks in wasted spark mode
Tried several advance settings but the problem are these awsome rpm spikes so it definetifly a noise porblem
Ran in the dark and no leaking visible
with the sparks besides the engine->spikes in the rpm signal
Spark plugs are self made steel body corian isolater
Will post some pics of the parts later

Michael
« Last Edit: February 04, 2017, 05:53:30 PM by michelko »

Offline michelko

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Re: Bugatti Typ 50 1/4 Scale model
« Reply #22 on: February 04, 2017, 05:47:31 PM »
So here are the pics

Offline michelko

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Re: Bugatti Typ 50 1/4 Scale model
« Reply #23 on: February 04, 2017, 05:54:53 PM »
An excellent build  :praise2:  :praise2: I will be following along  :wine1:

What are you using for fuel feed at the moment, a carburettor?

Yes at the moment, later it should run on injection similar to keiths setup.
I will hide the injector in the blower housing.
Michael
« Last Edit: February 04, 2017, 07:40:49 PM by michelko »

Offline Vixen

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Re: Bugatti Typ 50 1/4 Scale model
« Reply #24 on: February 04, 2017, 06:22:26 PM »
Just look at that hand scraping (frosting) on the cam boxes. Beautiful.

Please can you tell us what type of solder you used to fabricate the lower crankcase and sump?

Fantastic workmanship

Mike
It is the journey that matters, not the destination

Offline fumopuc

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Re: Bugatti Typ 50 1/4 Scale model
« Reply #25 on: February 04, 2017, 07:41:15 PM »
Hi Michael, very impressive. Is it right that you have incressed the stiffness of your mill by an additional frame around the column ?

Yes thats right. This was a lasercut set from heinz auracher its called hüfthalter.
At this pictures i testfitted the parts. Menwhile the parts are scewed to the column, welded together and painted.

Michael


I have heard already about this Hüfthalter for the BF20 mill, seams to be really heavy stuff.
« Last Edit: February 04, 2017, 07:44:40 PM by fumopuc »
Kind Regards
Achim

Offline Roger B

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Re: Bugatti Typ 50 1/4 Scale model
« Reply #26 on: February 04, 2017, 08:06:44 PM »
Looking at your ignition set up I have a couple of quick comments:

I think you need some good ground connections (braids) between the metal bodies of the vag ignition modules and the engine block.

Can you connect the resistor ends of the ignition leads directly to the ignition modules without the additional lengths of wire with crocodile clips.

Both of these steps should significantly reduce the interference.
Best regards

Roger

Offline michelko

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Re: Bugatti Typ 50 1/4 Scale model
« Reply #27 on: February 04, 2017, 08:40:52 PM »
Looking at your ignition set up I have a couple of quick comments:

I think you need some good ground connections (braids) between the metal bodies of the vag ignition modules and the engine block.

Can you connect the resistor ends of the ignition leads directly to the ignition modules without the additional lengths of wire with crocodile clips.

Both of these steps should significantly reduce the interference.

I will try this

Michael

Offline Admiral_dk

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Re: Bugatti Typ 50 1/4 Scale model
« Reply #28 on: February 05, 2017, 12:32:59 AM »
I would ground the screen on the "sensor" (Hall-Effect) to the engine block as close to the sensor as possible - right now you got a lot of induction noise on their wires from the high tension side of the ignition.

This connection does not pose any problems since you are using dual output coils (normal for wasted spark on two cylinders sharing a coil), as they aren't connected to ground (except through the sparkplugs). On a distributed system, you got a much more complicated grounding system / problem, when using Hall-Effect sensors.

Best wishes and hoping that you soon solve the problem and get your beautiful engine running as it should.

Mit Freundliche Grüße

Per

Offline Art K

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Re: Bugatti Typ 50 1/4 Scale model
« Reply #29 on: February 05, 2017, 01:31:03 AM »
Michael,
Thanks for doing the dedicated build. Your workmanship is quite impressive. I liked the water jacket around the spark plug counter bore. Sorry I can't add anything to the electrical problems.
Art
"The beautiful thing about learning is that no one can take it away from you" B.B. King