[65ShelbyClone]

Slightly bigger problem is, that i don`t have a underpressure tempering furnace (normal version, i do have) for titanium forging.
And the forging mould for the crank, would be so complex, that it is not worth of doing just one piece!

Depending on your target RPM for the engine, the rods and valves probably don't need to be forgings. If you are shooting for 30,000-40,000 rpm, that might be different, but 18,000-20,000 should be a lot less difficult to build for. Regarding the crankshaft, I would bet money that it is a billet piece and not forged.

I don't know how true to the original you want it to be, but think you could also save some headache by using coil spring valvetrain. Many of the 250cc Japanese 4-cyl bikes have factory redlines in the 18,000-19,000rpm range and that's with heavier steel valves.

[hetfield]

I am pretty courious on how you where going to make the long thin parts like valvestems and so on, any thoughts about it?

There is two way to make the valves.
The other way is turning and grinding.
But if i use Nimonic 80A steel. easiest way again is forging, and then grinding.

[elmerfud]

Hetfeild, your work is almost factory cad in appearance.
You have put me in the shade pal.
Keep up the good work!

[hetfield]

Hetfeild, your work is almost factory cad in appearance.
You have put me in the shade pal.
Keep up the good work!

Thanks!
I have runned a little calculations with one cylinder 37.5cc. And best performance is 7.38 kw @ 35000rpm and 3.15 nm @ 5000rpm.
With following cam:
Intake opens 5dec closes 20dec
Exthaus opens 55dec closes 10dec

[dynosor]

Thanks!
I have runned a little calculations with one cylinder 37.5cc. And best performance is 7.38 kw @ 35000rpm and 3.15 nm @ 5000rpm.
With following cam:
Intake opens 5dec closes 20dec
Exthaus opens 55dec closes 10dec

I can see how one can calculate power as a function of air pumped and fuel burned, multiplied by some overall volumetric and thermal efficiencies, but how did you determine the RPM at which peak power would occur? Your torque peak RPM seems low compsred to the peak power RPM - does your design have variable valve timing?

[hetfield]

I can see how one can calculate power as a function of air pumped and fuel burned, multiplied by some overall volumetric and thermal efficiencies, but how did you determine the RPM at which peak power would occur? Your torque peak RPM seems low compsred to the peak power RPM - does your design have variable valve timing?

No i don`t. It would be difficult to design.

[elmerfud]

Wow, 35k rpm, 20.7 stroke valves say 21mm or so.
Maybe a desmo setup could hold the revs, a steel spring I feel would not.
Maybe a single cylinder test motor to prove valvetrain before you build all ten.
If you are building pnuematic valves the discoveries you make for sealing them reliably I would keep top secret, a patent or a business idea.
Pnuematic valves are still distant from mainstream and i consider them exotic. (if that counts for anything)
35k, you'll get a job at ilmor or cosworth, exciting stuff!

[hetfield]

Wow, 35k rpm, 20.7 stroke valves say 21mm or so.
Maybe a desmo setup could hold the revs, a steel spring I feel would not.
Maybe a single cylinder test motor to prove valvetrain before you build all ten.
If you are building pnuematic valves the discoveries you make for sealing them reliably I would keep top secret, a patent or a business idea.
Pnuematic valves are still distant from mainstream and i consider them exotic. (if that counts for anything)
35k, you'll get a job at ilmor or cosworth, exciting stuff!

Yes. the sealing might be a little challenge!
But the camshaft is rotating "only" at 17000rpm, and the valves are so light that it might work!:banana:

I am going to build a single cylinder proto. Because there is so much to learn, before it runs!

PS:Megasquirt doesent support revs over 19000rpm. any suggestions?

[elmerfud]

Um, i was going to use a cbr250 transistor based ignition module for my one.
(19k) 35k I have a feeling you may have to get experimental.
Could you double up the modules to get a 38k rpm spark? (180 deg out of phase)
There is a guy out there who has built a half scale 049v10, forgot his website.
He's out there somewhere, he went for conventional valve springs, shim and bucket.
I have a feeling yours will be much better.
It is easier to lower rpm from the target of 35k.
I know desmo is not in keeping with the 049v10 but i have heard ducati can achieve theoretical figures like that.
That becomes a 'Hetfield' v10 then.

[elmerfud]

Many tasks have since taken precedence over all this stuff, so V10 no more for a long while.
Hetfeild can you show a link to your blog if you got one, keen to follow your progress.
Check out this guy, he bought a stripped bare 054 v10 and gave it a super thick powder coating in whacky cyber colours.
Didnt even digitise the port shape, what a knob.

http://s99.photobucket.com/albums/l3...kid/?start=820

It goes from about page 40 to 45.

I saw that motor for sale on a pallet for 10 grand US in better nick.
Lots of casting damage everywhere, tears I cry.

[kmac_20]

hi guys can i get plans to make a v 2 ic engine

[dynosor]

hi guys can i get plans to make a v 2 ic engine

You means like these?

http://www.floridaame.org/GalleryPag...l%20V-Twin.htm

http://www.floridaame.org/GalleryPages/g1M0287.htm

[dynosor]

hi guys can i get plans to make a v 2 ic engine

You can get complete Harley Davidson model engine drawings here:

Part one: http://www.modelenginebuilder.com/issueten.htm
Part two: http://www.modelenginebuilder.com/issueeleven.htm

Ask for backorder copies of issue 10 & 11 only from here:
http://www.modelenginebuilder.com/contactus.htm


Somebody else's build of this engine:
http://www.homemodelenginemachinist.com/index.php?topic=1831.msg61106#msg61106



[ame="http://www.youtube.com/watch?v=PG3QMqx06eI"]YouTube - Mini V-twin engine-1st run[/ame]