Julian's Scrambler build "Post 1"

[JulianM]

Latest update.

After 110 hours work the barrel is now completely finished other than Nikasil coating the bores, and its going in a box to be sent away for that today.  75mm bores in the end, as you can see 76 would be a no no without moving studs.  As it is the bores have been moved slightly to centralize on the 3 innermost studs. Grove at the top is for the gas filled "Wills Rings" instead of a head gasket.











Hope you like it.
Regards,
Julian

[bsa-bill]

Awesome - I should qualify that by saying I'm pretty ignorant re how much work is required to produce something like this, however I think I'm probably correct in my assesment.

[JulianM]

Thanks Bill.

J

[a10 gf]

Great stuff, works of art.

[Topdad]

Julian, they look the bee's knees ,simply magnificent work ,can't wait to hear how she goe's , best wishes BobH

[JulianM]

Thanks guys,
Will be gearing up to screw things together in the early new year.
Will keep you up to date.

Regards,
Julian

[muskrat]

 Great stuff Julian, I can appreciate how much work you have put in being an old fitter & turner myself. Bill got it right "awesome".
Have you kept the skirts short so as not to need the cut outs for the rods?
Keep it coming, I'm hooked.
Cheers

[metalflake11]

Amazing!

[JulianM]

Hi Muskrat,
Skirts short as the pistons I will be using are short skirt type also,  The barells are just as long as the bottom of the piston and no more. weight saving and as you say, rod notch saving too.
weighed the barell last night at 3.85kg  the std cast iron one one was 8.2 so just a little lighter than stock 

Looking forward to bolting it all together.

Regards and thanks all for the kind comments.
Julian

[RichardL]

Julian,

If I haven't said it before, I am in total awe of your skills. So, you said to yourself, "No big deal, I can carve a set of barrels in my spare time from a solid chunk of aluminum."? I had to look twice at your user name to see the "M" after "Julian", because I would have been disturbed if it was a "G".

Muskrat,

Ya know, when we give our bikes gender, it's always female, as in "the old girl", "she", etc. Clearly, Julian likes his girl with short skirts.

Richard L.

[JulianM]

Hi Richard,
Thank you for the compliment, however making most of these things is more an attitude than actually "difficult" as such.
Most people who can use a machine "could" make similar stuff; it's just going for it that makes the difference!  And policing the quality and the level to which you take it.
I find myself being a little "blasé" about these things because I am spoilt in my day job, we do these types of things all the time and making new cranks and rods etc., stroking engines and making new engine parts becomes common place. Then you forget just how lucky you are to be in a position to do all this fancy stuff.
I also have friends around me who can advise me and help when the going gets tough. 
I have the sad habit of immersing myself in engineering and engine design etc, for most of my spare time, even when in front of the TV I read tech books and design parts. Sad but true!  My life for the last 35 years has been so, and probably before that also. 
When you live, eat and breathe metalwork you do seem to look on things with a different perspective. 

Hopefully though my thread will show others how "easy" or should I say "possible" it is and not how hard it is.  If you can throw time at it and be lucky enough to have a fun toy shop to play in.

www.LMBracing.be

Regards,
Julian

[JulianM]

Little update on some prep I did last week.





Flatted all mating surfaces on the big face plate,
Then cleaned and then epoxy painted the internals,
We use Glyptal Epoxy in all our engines as it really helps to keep things non porous and clean.
Never seen it come off either if applied to well prepared surfaces.

More bits to follow but loads of things still out for ceramic coating and Nikasil etc.
hope to see them before Christmas but will see.

Julian

[Rocket Racer]

I had wondered if you would move the stud spacings.
As others have said, this is lovely work. Can only imagine that kit and expertise.
If you can find the time to knock out any more of those barrels, count me in for a set!

With your crank and piston changes am interested to see what rod lengths you're opting for and compression planned for.
I'm still months away from having my 6" rod 358 cam bottom end together, but its decidedly amateur in comparison to your work.
Regards
Tim

Latest update.

After 110 hours work the barrel is now completely finished other than Nikasil coating the bores, and its going in a box to be sent away for that today.  75mm bores in the end, as you can see 76 would be a no no without moving studs.  As it is the bores have been moved slightly to centralize on the 3 innermost studs. Grove at the top is for the gas filled "Wills Rings" instead of a head gasket.











Hope you like it.
Regards,
Julian

[JulianM]

Hi Tim, and Happy New Year!

Rod lengths will be standard with lowered piston crown height.  Pistons in manufacturing now with Arias.
CR will be 10.5:1 at least with 11 as a little thought in the back of my mind as I may use a 50/50 methanol - Petrol mix if I decide to be stupid      But I "hope" 10.5:1 will prevail as it would be a lot more useable.  (read intelegent)

I did think of moving studs but decided that 777 was good enough engine size and it saves a lot of messing around.

Keep you informed when the barrel gets back from nikasil.  Soon as just been told it's finished.

Best regards,
Julian

[JulianM]

Just got the block back from Nikasil coating from Aptec and also a big box of goodies from SRM,  Very good start to the week!!

SRM by the way have been one of the most profecional and helpful companies i have ever had the pleasure of dealing with.  Highly reccomended!!

Will send pics tomorrow.

Julian