my first I.C.: a V10

[jimmybondi]

Hi,

next few parts of the carburetor prototype:

Greets Frank

 

[ttrikalin]

Ausgezeichnet!

:bow: :bow: :bow: :bow:

 

[jimmybondi]

Hi,

some news on my last challenge

i made yesterday and today the timing wheels and taperlock-bushes:

the wheel after milling the teeth:

in foreground 3 wheels in 3 different stage of manufacturing:
left like abvove
right turned a recess for the disk beside the wheel
middle: contour for press-form the disks
(please - if you can name me the right words on it i'll edit it - but:
i don't like to google quad of a hour for every special word ...
i think you understand )

pressed disks in detail:

2 wheels after turning the surface - one in pressed stadium

result: necessary wheels for my engine

one wheel i made to test some things like "how stable is the pressed/transformed disk ...
and on this wheel i tested how it would look when finished

that wheel fitted on my engine
looks like "made for it" i think .-)

the taperlock-bushes in very miniature .-)
the 2 screws are M3 x 4
Outer diameter of the bush iss 15mm, bore 4mm

the selfmade tool:

Frank

 

[crankshafter]

Frank.
Only have to say, great work. th_wav woohoo1
One question: You are going to split the tapered boss, eh?

Best.
CS

 

[jimmybondi]

One question: You are going to split the tapered boss, eh?

of course
without there isn't any feature

Frank

 

[agmachado]

Hi Frank,

Absolutly fantastic !!!

Cheers,

Alexandre

 

[jimmybondi]

Hi Alexandre,

thanks for the praise

today i finished the timing wheels:
turned the profile inside
mill the webs
glue & slotted the bushes

and it looks not bad i think - the relations to the engine

Frank

 

[agmachado]

Frank,

Please, some doubts:

- What is the angle for a V10 engine ? In the V12 can be 60 degrees or 90 degrees in the V8, right?

- What is the positions of the connecting rods bearings in the crankshaft ?

V12:

O

X

O O

V8:

O

O X O

O

Do you understand me ?

Thanks,

Alexandre

 

[jimmybondi]

Hi Alex,

the crankshaft has an angle of 72° also the angle between the cylinders


1

4 5
O

3 2


here you see the firing order also
the engine is left rotating,
Cylinders 1 & 6 on the same crankpin, 2&7, 3&8, ...
firing order: 1 - 6 - 5 - 10 - 2 - 7 - 3 - 8 - 4 - 9

Frank

 

[agmachado]

Yes !!! I understand.

Very thank you Frank.

Alexandre

 

[jimmybondi]

Hi,

last days i made some small things and opticals:

mill some roundings
turn the 20 tappets (the patrts between cam and valve)
a lot of work because every part individual made to adjust the clearance for the valve

luck to have a friend who lend me a 1/4-32 tap to made the
spark plug threads - a look from inside:

(valve dia 11mm)

after finish of this terrible job a probe fit of the heads:

an idea for the carbs:

everything not very difficult but the needles ...

i'll see what i do ...
10 carbs will be a very imposant view and maybe a unforgettable sound when trottle ...



Frank

 

[jimmybondi]

ahh

i have forgotten s'thing:

what do you think:
is it sufficient to use carbs with a inner diameter of 4.2mm ?
(in the case i use 10 carbs)

i can get 10 carbs with 4.2mm on very low price.
disadvantages:
- not D.I.Y. :-(
- very small on 10ccm (.65) on every cylinder ...
- not always metal

Frank

 

[ttrikalin]

I have read that a single carb can handle up to 4 cylinders. This is because they draw at practically nonoverlapping times of the cycle.

If this is correct, 5 rather than 10 would be more than sufficient.

any thoughts welcome,

tom in MA

 

[gbritnell]

4.2mm is more than large enough for a .65 bore. I would only suggest that trying to balance 10 of them would be a nightmare. As far a the material, what does it matter? Most engines today have some kind of plastic on them so we can do the same thing.
gbritnell

 

[T70MkIII]

5 scale twin-choke Weber style carbs would look great on that engine, and only 5 to balance ...

 

[jimmybondi]

Hi,

the timing belts arrived today

first made 3 very small pulleys ...

Frank

 

[James A. Lee]

This one has the look of a Schillings design...wahr oder nicht? Alles ist sehr schoen!!

James

 

[jimmybondi]

Hi James,

yes - the principle design is Schillings.

Frank

 

[jimmybondi]

Hi,

last few days not done a lot
But the small things will take most time :-(

Frank

 

[agmachado]

Yes... Frank !!!

Good news !!! th_wav woohoo1

Take care,

Alexandre