Tiger Cub Cylinder Head Fixture // Paul Brodie's Shop

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#triumph #tigercub #cylinderhead #fussyframebuilder

[@macreit]

Hi, I would like to discuss the shorter videos topic. We all know it is hard to guarantee consistency, especially with technical videos. This change, to me, is not getting the same appeal as before. It is clear that 15 minutes isn’t enough time. Of course I speak as a “watcher” so probably I am unaware of you tube money/success making rules. I genuinely think that for this kind of topic 30 minutes is the minimum time to really appreciate the episode. Don’t get me wrong, I really enjoy every second time of what you guys make, and I welcome and appreciate the effort and the work that needs to be done to produce every second of what we enjoy from our sofa. This is my humble opinion: technical topics are for technical people and the length of videos is not a obstacle or a reason to look for something else. Good videos and good ( in this case excellent) topics, worth any - reasonable - length of time. Please, get out one a week, or even in a fortnight, but with a nice, long, fulfilling, satisfying, comprehensive video. Just my opinion, you’re doing a great job already, don’t get me wrong! Great substantial channel with lots of things to learn and appreciate. Hugs and cheers.

[@macreit]

@@TheAggromonster If that was the reason, I would be happy to support with likes and views on shorter contents, like 3 min pills etc. just to keep KZbin happy. End of the day, interactivity and on demand has to work for both sides. I knew as well that ads would have took off soon, and I am not complaining about it. It would be very sad though if I had to live with shorter videos on technical contents.

[@yt66228]

OMG I just lost a year of my life when you turned the lathe on. By the way get yourself transfer punches.n You will love them.

[@grahamreeve5209]

I'd have gone back to the Bible, Tuning For Speed by Phil Irving he writes a good piece on exhaust ports and how to keep the head cooler

[@GTfiveDrift]

Your videos are good but a liked the old format better.

[@jamesmackoviak8101]

15 minute episodes are too short.

[@greybeard3759]

The new format of twice per week is working well but, may I make a suggestion? ONE HOUR twice a week!! I never tire of seeing your solutions.

[@ianbee456]

So... at 3:11 you were showing the jig for the Excelsior head, nice work. Shame about the head though... in Paul's trademark hand, and red ink... the letters NFG... I'm sure it's just a technical term boys and girls!

[@paulbrodie]

It's NFG because the core shifted when the head was being poured. I probably had 10 sets of heads cast and they were no good because there was no support for the valves seats on one side. The foundry shrugged its' shoulders and I had to find a better foundry. All part of building a motorcycle from scratch.

[@John-nw8uj]

Excellent, I learned most of your techniques 57 years ago as a Technician Apprentice in a Locomotive works in UK. Been a biker all my life, really enjoy your down to earth approach to a technical problem. Looking forward to more education from a Master of the engineering art. John

[@paulbrodie]

John, thanks for watching and commenting.

[@ShotgunAU]

complex fixture building is an art I could watch all day

[@paulbrodie]

@@ShotgunAU Thanks for watching.

[@tomfortson2684]

Thanks Paul, I love how you explain what you're doing and WHY! Looking forward to your next video, too!

[@TheOldaz1]

Interesting but logical way to develop a fixture for an odd/unusual shape. I saw the next video, so had to come back and see how you developed it. Thanks guys.

[@criticalmass181]

I always love how your videos come out in the middle of the night (in my corner of the world). It's 4 am, i'm tired, but can't sleep.....Hey!! Paul's here to keep me company! Lovely!

[@joneserupinsmoke9161]

I do like ur efforts u put into it though .if u habe the rite tools use em but work ietg what we got

[@andresantos7514]

I prefer the previous format, this way feels short.... keep up the good work!

[@danielboughton3624]

Another excellent video on how to approach a problem. Transfer punches as someone else mentioned are great and are not particularly expensive. The other approach for this is of course a mill, right angle plate, and boring head. The mill can also be handy if the part is too big to swing in your lathe. That said too many people forget a lathe can be used for this type of operation and it was common not so long ago.

[@paulbrodie]

If I was just boring the port, a mill would have been easier. But, I cannot cut threads on my mill...

[@danielboughton3624]

@@paulbrodie I thought about that after I posted - I can cut certain threads on my mill and also on my big drill but not all of them!

[@paulbrodie]

@@danielboughton3624 I can tap threads on my mill but I cannot single point them.

[@volksdeutschewaffenss9670]

hi Paul and Mitch, i really enjoy your videos expecially the one about the motor Paul built, your workman ship is great and Mitchs camera work and editing makes for a professional like show, even my wife watches and takes notice , which says a lot , she dont take notice of me any more!!!!!!, where both looking forward to hopefully more episodes from you both , cheers from downunder Mates

[@paulbrodie]

Australia, I presume? That's great your wife watches too. Yes, we will do a few more episodes.

[@raynyhus2026]

You should fix that head with aluminum pipe welded in the way you fixed the one in the video. Nice work as usual.

[@paulbrodie]

Thanks Ray.

[@alex4alexn]

cant wait for the next episode!

[@paulbrodie]

Thank you!

[@mcjok88]

Ok, to short. We need to finish the thought.

[@edbennett8257]

I'm curious why you would choose to build a lathe tool for this job rather than a mill table fixture. I've done similar jobs on Harley heads and always set up in the mill. Is there a compelling reason I should be aware of for doing it in the lathe?

[@mhbh1979]

I guess the only reason is that it will be threaded internally. Paul could also bore it out on the mill and make an alloy threaded insert to weld in.

[@edbennett8257]

@@mhbh1979 Gotcha, thanks! I wasn't thinking about the threading part of the equation. H-D doesn't use threaded in spigots so it's not something I've had to consider. Makes perfect sense now. A perfect example of thinking all the way through a process before taking the first step!

[@paulbrodie]

How am I going to cut a thread in the milling machine?

[@dennisyoung4631]

@@paulbrodie that *IS* the rub. You would need a CNC mill and do thread-milling…. Trouble if you need Whitworth thread.

[@paulbrodie]

@@dennisyoung4631 The stock insert is 20 TPI which is very common.

[@glenpiro313]

As usual, another beyond informative video. The build in place aspect of this one is something I have never seen in an application like this, and the four jaw chuck becomes a real key to making it work. Question for you please? When you spun up the lathe at the end, obviously you were alerted pretty much instantly and shut it down, and followed up with "did you catch that?" to Mitch. I watched multiple times, and I definitely heard the change , but I didnt actually see what happened that caused you to shut it down right away.

[@paulbrodie]

The lathe was vibrating and shaking! Had to shut that down..

[@normansandds757]

What no transfer punches go stand in the corner marster Brodie .

[@paulbrodie]

I don't have everything in my shop.

[@1crazypj]

As always, fascinating to see jigs and fixtures being made and speculate on what I would have done. I've made extensions for dial indicators from old bicycle spokes, there only seem to be 2 main sizes of thread in plunger, 4x48 and 2.5x0.45. It's handy if you want to dial in on round bar in chuck instead of the not so round port. I also agree with Andrea Piscitelli in post below but realise the editing of more video can take an inordinate amount of time even with a fast computer and editing software.

[@paulbrodie]

Mitch and I put a lot of energy into making these videos. For me it is now basically a full time job.

[@1crazypj]

@@paulbrodie That's understandable and why I haven't posted any video's for years. It was taking me about 4 days to edit down in most cases on desktop laptop is even slower

[@Alanbataar]

As always, thank you Paul & Mitch. I'm surprised that a man of your experience and skills in the machine shop doesn't own a set of metric & inch transfer punches. I don't use mine often, but when I need them, nothing else will do. I'm always leery of putting a drill into a tight-fitting hole, especially one that needs to remain precise. Maybe I'm over-estimating the required precision on early Triumph parts, however. I tend to agree with the other comment that the shorter videos don't have the same information density, or the time to comprehensively capture a subject.

[@paulbrodie]

I have never been exposed to transfer punches. I may have to talk to Santa.

[@Alanbataar]

@@TheAggromonster True! The punches themselves are also trivially easy to make. Just use O1 or another hardening tool steel, and harden the punch end, then temper it back slightly.

[@georgestewart1325]

You are a very clever talent bloke. Brilliant channel

[@johnb5519]

I'm wondering why you couldn't punch the centers of those holes while you had it in the lathe?

[@paulbrodie]

I would have to have a centre punch the same size as the 9/16" holes, and I don't have one. There's almost always more than one way to do something..

[@johnb5519]

@@paulbrodie Oh, I didn't realize the holes were that large.

[@lunkydog]

That Excelsior fixture is very nice 👍👍

[@raymaroney8355]

👍👍😊☮

[@Hertog_von_Berkshire]

Loving the way this jig is coming together. It's the sort of thing that you're only qualified to draw once you've made it. Ha!

[@paulbrodie]

That's right! It's easy to make a drawing after it is made...

[@TrionoBara]

👍👍👍

[@sams1870]

Nice work Paul. I made alot of fixtures for snowmobile engines to machine combustion chambers. I Really like your simple approach to some complicated geometry on that head. Maybe Santa will bring you a set of transfer punches for Christmas. Thanks for sharing.

[@paulbrodie]

Thank you Sam. Yes it is amazing that I have got by for 54 years without transfer punches.

[@JonPrevost]

I'm imagining a 4 jaw clamp could hold a plate where you want the head. I appreciate the effort put into making these videos. All the foibles being included makes for excellent content.

[@paulbrodie]

Thanks for liking our videos. There is often more than one way to hold something like a cylinder head...

[@sceneanuerebelrebel9244]

We called them Wentworth bolts! There's an easier way to get your stud centers--measure from inside of one stud to outside of the other stud at machine surface .Why ? Sometimes the studs are tweaked in different directions and give bad # 's . How hard is the aluminum,cut throat in half take 2 degrees off each surface on left side of motor and retig ,this should move carb away from frame.Clean up throat accordingly.Hondas and Yamahas had certain types of throttle cables with radiused 90degree cable ends for the carbs and frame clearances .

[@paulbrodie]

Yes, I think you have had a bit of experience with this stuff :) I don't think I want to start welding on the intake port, but I note your idea. Thanks for commenting.

[@xpndblhero5170]

As soon as you turned on the lathe at the end w/ the head in it, I got a little scared.... That's the type of thing I would NOT be able to do on a lathe unless it had a big bolt or rod through it and the lathe jaws held onto that and spun a LOT slower than you did. LoL I'd definitely be considering buying a mill at that point before trying that.... I don't even want to think about what a Cylinder Head-butt would feel like. 😫😩 😂

[@paulbrodie]

I've done a lot of Excelsior cylinder heads so I knew what to expect. If you're not used to that sort of thing you could get apprehensive..

[@TrionoBara]

Good video 👍👍

[@needmetal3221]

They dont run right with exhaust leaks that close to the head. I don't think the aluminum spigot is that bad of an idea. Maybe slip a steel sleeve over it? My first thought would be to mount it in a milling machine and use a boring head to round that thing up.

[@paulbrodie]

I have read that Tiger Cubs were particularly bad for air leaks at the exhaust port. So they would backfire quite a bit, and they never did have a good exhaust note. Lots of room for improvement.

[@humourless682]

Why not just bolt the head to an angle plate on your mill, and sort out the exhaust port with a boring head? I would guess converting the port to the 2 stud arrangement used on most Japanese engines, is going to be far more reliable and much easier to do than messing around with oversize threaded inserts?

[@paulbrodie]

I am trying to keep the bike somewhat stock looking, so I will make an oversize insert for the exhaust port. It will be a good project, right? What can possibly go wrong?

[@HepcatHarley]

You left that chuck key in on purpose, didn't you? :D

[@paulbrodie]

Yes, it was a test for the viewers.

[@herbwhitmore4482]

I think im seeing double , 2 is better than 1 , lol

[@eddybetanya]

Head in the shed, I get that all the time!

[@Frisky_FZR]

We neeeeeeed tiger cub merch

[@itsverygreen532]

Personally, I would have fixed the horizontal plate to the stub and the set that in the chuck ... then I'd drill and tap the plate to the head ... and finally, I'd then bring the plates together with it set in the lathe and tack it in place. Actually, I'd probably just do it all in the milling machine with a boring bar, I never liked spinning stuff like this on the lathe ...

[@paulbrodie]

My Tig torch does not reach my lathe. The welding department does not overlap with the machining department.

[@itsverygreen532]

@@paulbrodie Well, that sucks :)

[@rickfazzini22]

Chuck Norris would be to skerd to stand near that head spinning on the lathe, but not Paul Brodie! Sure Paul could have set it up on the mill and indicated it then use the boring attachment, but thats not good content now is it ;) Cool video guys.

[@paulbrodie]

Rick, I can't cut a thread in the milling machine.

[@diegobordon6364]

I thougth you were going to work in the mill!! 😨

[@performancecyclespecialtie6104]

Over size already make them !

[@ccbproductsmulti-bendaustr3200]

👍👌

[@dcarter001]

wow/

[@donhuebert9151]

I am really loving the twice a week thing but 15 minutes ain't enough. I just love your innovative, simple solutions to problems, you give me about 10 ideas an episode. I am currently restoring a 1954 Volkswagen beetle and it has been one solution after another. Thank you. Hopefully I'll be in Vancouver with it next summer, I'll drop by and take you and Mitch out for coffee.

[@paulbrodie]

Yes Don, other viewers also want 2X a week and an hour long each. It's not going to happen because Mitch and I need our sleep. Thanks for watching.

[@marvlinke7453]

Wouldn’t the mill be a lot easier?

[@paulbrodie]

I can't cut a thread in the mill.

[@billdyke9745]

Nobody who worked on making Cubs in Coventry back in the day would have believed that 60ish years on someone would invest this much effort in one. Flying cars, peace on earth they might have believed. Well done, professor. Most edutainable.

[@paulbrodie]

I know I am a little crazy, but in a good way.

[@billdyke9745]

@@paulbrodie I, for one, definitely approve of crazitivity. (I did the whole art school thing. How sensible was that)?

[@paulbrodie]

@@billdyke9745 Art school is a great way to unlock your creativity and step outside your comfort zone.

[@billdyke9745]

@@paulbrodie Art school was fabulous. I don't regret it for a second. To this day, some 50 years later I still carry the values. Don't believe anything that you can't prove. Trust nothing but your own judgement, and rail against all inequalities and inequities. Thanks, Paul. You have the same kind of fire in your blood, I believe. You do it in metal. (I just read that back and it sounds like pretentious bollocks, but, hey).

[@paulbrodie]

@@billdyke9745 Good words. Thanks Bill.

[@gargoreg]

I hid behind the soda when you spun it up!!!! There you were standing in front of it, brave. Another good video, thanks.

[@davidsnyder2000]

Lol😂

[@gerry343]

How big was the soda?

[@paulbrodie]

@@gerry343 That's what I was wondering too...

[@gargoreg]

@@gerry343 As big as a sofa... ;-)

[@gerry343]

@@gargoreg I guessed as much!

[@qivarebil2149]

Where's part two?

[@paulbrodie]

Just published today!

[@leighharron]

The Joy of Fabricating. Truly a treat to watch and learn

[@paulbrodie]

Thanks Leigh.

[@jdolecki100]

Why don’t you us the vertical mill to machine the exhaust ports?

[@dinsdalepiranah1189]

At the moment I'm thinking he wants to screw cut the thread in the head. The vertical mill won't do this, you would need a tap of the size required which would probably be a special tap. We will have to wait and see.

[@crozwayne]

@@dinsdalepiranah1189 but a cnc mill will! i can do any thread with thread milling on any port, internal and external, takes a fraction of the time

[@Rufio1975]

@@crozwayne May be wrong but I don't think he has a cnc. If thats true that recommendation does no good.

[@crozwayne]

@@Rufio1975 I know paul doesn’t have a cnc mill, I have and all I was was pointing out how easy it is for thread repair in any thread with thread milling

[@Rufio1975]

@@crozwayne Alright alright. Mucho take it easy. Just sounded like you were trying to be an a-hole which is not needed. There's lots out there.

[@joneserupinsmoke9161]

Brodie we do garage fixes .all I would do with the one UR working on now is take a file or some type of grinder and round it close as I could and call it a day

[@paulbrodie]

Obviously, we have different styles.

[@joneserupinsmoke9161]

Yea ur doing to much bud if we cant jerry rig it FCK it order a new one

[@paulbrodie]

There are no new ones.