Full Auto Update

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crankcas
Careful!

There's nothing in common with Maney and Molnar barrels, other than their intended purpose. Different castings from a different source.

Maney adopted a Dunstall lookalike design which have a similar appearance to the 750/810 flanged barrels but are actually through-bolted with exposed bolt shanks. I believe this was done to satisfy the Classic Racing 'period correct appearance' regs at the time.

Andy Molnar's barrels are more like 850 barrels as the regs aren't as stringent these days.



I believe Andy has done OEM pattern
es in the past, and is working on race quality ones at the moment.

I suspect if more potential customers made themselves known, he'd work a bit harder on them!

Maybe but the problem there would be making contact with the poison dwarf
 
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Maybe but the problem there would be making contact with the poison dwarf
From a personal viewpoint I've never had any problems, but I've known him for over 30 years.
Whatever the perception (and I know I'm in a minority!) as an individual, very few folks have issues with the quality of the product.
 
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I had the misfortune to work for him for a while. Whilst I would never knock the quality of his products, because the are without doubt of excellent quality, the man himself is an obnoxious little p$%*k. We used to joke that he had been fitted with a personality bypass valve.
 

SteveA

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Maney cylinders are being made by Andy Molnar,with,and without liners.Unless I am very much mistaken?What I am waiting for is for somebody to start making Maney crancases again.Nice work with the heads by the way,I may be in the market for one for my spare motor,to go with the Fullauto one on my race motor.
You are very much mistaken, Molnar is making his own design of Alloy/Nicasil barrels. The Molnar design is more like Norton cast items in apperarance than the Dunstall alloy ones that Steve designed his to replicate, a decision he had race eligibility reasons for! Changes in eligibility over the years negated these reasons, but the die was cast!
 

SteveA

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.....
Andy Molnar's barrels are more like 850 barrels as the regs aren't as stringent these days.
It isn't that the regs aren't as stringent....

There is a long-standing allowance to use the '850 engine', because the class cut off dates have always been up to end '72, and the 850 was only sold from '73. My 750 short stoke uses 77mm bores with an 80.4mm crank because internals are free, even this configuration is more like '74. The eligibility document is poorly worded because if you run in the 750 class you would still need to comply with capacity limits (780cc!, i.e. 750 plus overbore)

So it specifically allows for 850 style bolt through barrels.
 
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Update on FullAuto heads.

This has been a frustrating project. We were hoping to have the casting done in Australia. After waiting several months for our first 10 samples, we were notified that the samples were complete, but the foundry no longer wanted to do the job. Samples and tooling were sent to the US. The sample castings were not up to our quality standards and the tooling had been damaged. The damage was repaired on the tooling by the foundry, but the tooling also showed a history of damage and repairs.

I sent the tooling and a sample casting to a foundry I work with here in the US. This US foundry reported back that they also were not impressed with the quality of the castings. They also reported that the design for the patterns, core boxes, and the assembly of components for casting was a bad design, and this had led to the multiple indications of damage and repair to the tool.

So, I bit the bullet and paid to have new tooling made for the casting process. The new tool is beautiful, and we are expecting casting samples in the next week or so. We have used the original sample castings from Australia to start our machining tool path on our 5-axis mill.

So, we are close, stay tuned
Hello g81...very nice pics of that head casting you showed, nice clean casting lines and flow. good luck with your endeavor as we all would like to see you succeed. what caught my eye was your handle G81 which is a spot drilling canned cycle code. i am a retired machinist myself (now retired for 15yrs) but i used to run a 5 axis Mazak lathe and also ran a 4 axis mazak H15 horizontal machining center which had a six pallet shuttle with a 80 tool changer carosel. both had fanuc controls at the time which back 30yrs ago were considererd top of the line. we used g82 & g83 codes also for drilling/peck drilling codes which you could program depth of cut amount of retract etc. very useful for coolant thru drills to flush out the chips. i regress, i restored a 72 norton commando 25yrs ago and later sold it as i had a hard-on to buy a bmw motorcycle. of the many,many bikes i owned and sold the norton is the one i really regret. consequently i bought a 1974 850 commando this past fall and now in the progress of restoring it. i am 74yrs old now and hope to restore this bike so i can ride it before i am too old, however i still have my harley to ride.
 

G81 Can Cycle

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Hello g81...very nice pics of that head casting you showed, nice clean casting lines and flow. good luck with your endeavor as we all would like to see you succeed. what caught my eye was your handle G81 which is a spot drilling canned cycle code. i am a retired machinist myself (now retired for 15yrs) but i used to run a 5 axis Mazak lathe and also ran a 4 axis mazak H15 horizontal machining center which had a six pallet shuttle with a 80 tool changer carosel. both had fanuc controls at the time which back 30yrs ago were considererd top of the line. we used g82 & g83 codes also for drilling/peck drilling codes which you could program depth of cut amount of retract etc. very useful for coolant thru drills to flush out the chips. i regress, i restored a 72 norton commando 25yrs ago and later sold it as i had a hard-on to buy a bmw motorcycle. of the many,many bikes i owned and sold the norton is the one i really regret. consequently i bought a 1974 850 commando this past fall and now in the progress of restoring it. i am 74yrs old now and hope to restore this bike so i can ride it before i am too old, however i still have my harley to ride.
Look at the Alton and CNW electric starter kits. I have a 73 and a 74 Norton that I upgraded to a CNW electric starter, and it has made my Norton rides much more frequent. I am 68 and can still kick over my other bikes, but I do enjoy the electric starter.

Good to see someone that understands Can Cycles and G & M code. I have been machining for almost 50 years, and still make some chips occasionally.
 
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If its not too late I wish you would re-angle the intake valves. It would still take stock size valves and everything would fit. But then anyone could open the seats and install oversize valves at their convenience. That would give you an edge on the competition.
 
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If its not too late I wish you would re-angle the intake valves. It would still take stock size valves and everything would fit. But then anyone could open the seats and install oversize valves at their convenience. That would give you an edge on the competition.
There's competition?
 
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There's competition?
If there isn't now then it can always show up later - and imaginary competition might motivate John into giving us room for bigger valves. Re-angles intake valves with larger diameter seats would make it easy to open the ID and install larger valves. The valves were designed for a 650 and are too small for a 750 or 850.
 
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Onder

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Never mind the bigger valves. There is no substitute for cubic inches!
 

G81 Can Cycle

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Jim

We will first start with a standard set up. The core boxes that establish the cores for the intake passage have features that are fixed for the valve guide. once we have this running well, we might cast some heads without cores for the intake passage, thos will allow for CNC machining of the intake port (raised floor ect) and changing the intake valve angle
 
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I happened to be rereading the " Head Flow Testing" thread today and came across the following
Ex member Caustic Carbon fibre questioned the value of flow testing for an old Dinosaur like the Commando.
Jim responded with 13 things he had learned from flow bench testing Commando heads.
Number 7 relates to the discussion above.
From that post-

7. Bigger valves are nice. Re-angled valves are not.
 
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