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Post by enigmas on May 29, 2008 11:16:45 GMT
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Post by enigmas on May 29, 2008 14:56:08 GMT
Sorry John I don't mean anything! I am not John Twist. ~ Vince
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Post by johnwp5bcoupe on May 29, 2008 15:10:33 GMT
Toooo many Tinnnnnnnies answered the wrong post can't see why? I watched all those clips a few days ago Vince some useful tips  |
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Post by harvey on May 29, 2008 16:36:26 GMT
Admin should make those clips a "sticky" so they don't get lost in the maze of other postings. There are some good bits of info amongst that lot, some more relevent than others but useful all the same.
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Post by Phil Nottingham on May 29, 2008 21:13:12 GMT
Like this?
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Post by enigmas on May 30, 2008 7:33:00 GMT
Yeah Guys, I'm a big believer in hands-on 'Visual Teaching & Learning.' Words are useful to a point, but often can be too abstract leading to confusion.
Generally people don't want to admit that they haven't got a clue what some expert said or wrote, and this only leads to more frustration. Ever try to explain some simple concept to someone else... but in writing. This exercise is often used to illustrate the confusion of communication.
I was recently trying to setup the the automatic chokes on a pair of Zenith Stromberg CD carbs (of my Rover V8 powered ZB MG Magnette) and was somewhat clueless as to how to properly set and calibrate the Bi-metal heat sensitive coils on these units when I fortuitously found John Twists excellent explanations on You-Tube.
I've been tooling around with a modified cooling systems on both my Modified P5 Mk3 V8 and the V8 Magnette for some time and want to try the You-Tube thing.
I think it is an excellent way to illustrate some basic maintenance and repair procedures on our cars.
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Post by Warwick (Ozcoupe) on May 30, 2008 8:17:36 GMT
Ever try to explain some simple concept to someone else... but in writing. This exercise is often used to illustrate the confusion of communication. I've been tooling around with a modified cooling systems on both my Modified P5 Mk3 V8 and the V8 Magnette for some time and want to try the You-Tube thing. Too true Vince. How soon can we expect your video on the converting of a BW35 to Australian Falcon parts? |
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Post by johnwp5bcoupe on May 30, 2008 13:05:03 GMT
I did Mr Twists chamber test and mine were the wrong way around  I dont know how much difference it will make  He says keep your finger over the dashpot filler but if you watch he dosn't very easily seen on the second try  |
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Post by enigmas on Jun 1, 2008 5:04:21 GMT
Warwick I'm happy to talk you through it (help you with a parts list) or visit you for a dismantling and rebuild session. The only time things go wrong is when they're done in haste. We could even give it a bash with a video camera when the time comes around to it.
John, I'm glad you found something useful as well. It's very easy to miss the discrete variations on some components, assemble a unit and then wonder why it won't work.
On the Stromberg units on my Magnette, one of the choke units wouldn't retract but this wasn't visible to me until I removed the heat capsule with the bi-metal spring and started the engine. The vacuum unit on the choke pulls the choke off once the engine fires and this in turn is resisted by the 'cold' bi-metal spring, which finds an equilibrium. What I couldn't initially see was that one unit was running rich (no vacuum signal to the choke unit) due to a previous owner? having broken off the idle stop and gluing it back on with JB weld or something similar. In the process of doing this the adhesive entered and plugged the vacuum passage to the choke vacuum unit. Had it not been for John Twists You-Tube video on these units, I'm sure I would have still been perplexed.
The only thing that annoys me about You-Tube is that the video file can't be saved to a local hard drive (perhaps someone here knows how to do this?). From time to time stuff is removed and the info disappears
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Post by Warwick (Ozcoupe) on Jun 1, 2008 6:28:22 GMT
Thanks Vince. It will be quite some time off I suspect.
I tried the John Twist piston matching test this morning. (Always wondered what happened to Casey Jones).
What a nightmare! Mine don't drop uniformly. One almost stalls. I then removed all the lubrication and tried them dry and it wasn't much better. They don't bind - just very close tolerance and minimal air gap. Whichever way around I do them, they are nowhere near each other in time taken. Presumably this means that some bits aren't original.
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Post by johnwp5bcoupe on Jun 1, 2008 6:52:55 GMT
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Post by Warwick (Ozcoupe) on Jun 1, 2008 9:37:01 GMT
Thanks John. That padded room sounds inviting.
There isn't even a bracket for a spring on the RHS. If there had been one like on the LHS, I probably would have become suspicious much earlier.
And as for the centre spring you mention - not a sign!
I wonder if I'm in too deep, and it's too late to buy a classic Daewoo?
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Post by johnwp5bcoupe on Jun 1, 2008 10:39:01 GMT
I wonder if I'm in too deep, and it's too late to buy a classic Daewoo? OHHH boy a serious case the padded room is not enough I have sent a PM |
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Post by enigmas on Jun 1, 2008 12:19:34 GMT
Warwick...How much do you trust your skills as a fitter or perhaps fettler? The way to match the units is to match the slowest falling piston to the fastest using some very fine, 'worn' wet and dry paper on a flat block and perhaps a drill held in a vice at slow speed or a lath if you have one. Autosol a very fine abrasive paste (for chrome) could also be used. The differences in air bleeding past the vacuum chamber and the suction piston is miniscule so you'd need to be careful but it could be done if you really wanted to match the units.
A bit of practise on an old SU unit would be valuable reference info.
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Post by Warwick (Ozcoupe) on Jun 2, 2008 1:03:36 GMT
Yep; should be able to do that Vince.
After messing around for ages trying to do it the way John Twist does it, I eventually found it much easy to do them one at a time and upside down. That is, rather than having the air leak into the vacuum chamber as the piston drops, you have the air leaking out of the chamber.
I found it easier to hold the chamber upside-down and hold the piston by the needle, then let it fall down until you feel the piston rod touch your thumb blocking the oil-filler hole. You can watch it fall and can see when it's getting close to the end, and use the second-hand of a clock to time it.
Anyway, I digress. It's just the frustration that is getting to me at the moment. I had a car that was hard to start and ran well, but not ideally. It just lacked a bit of power and felt "unhappy" when asked to accelerate at speed. Now, after attempting to fix the starting problem, I have a car that doesn't go at all.
Probably no different from everyone else. I enjoy tinkering, and I like improving and optimizing the machine, but only when that is the plan. I don't enjoy break-down maintenance; and that's where I find myself now.
But, it's all pretty inconsequential really when compared with some of the drama that many here have had to endure. I'll get it sorted out - it just won't be tomorrow.
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Post by johnwp5bcoupe on Jun 2, 2008 5:56:59 GMT
after messing around for ages trying to do it the way John Twist does it, I eventually found it much easy to do them one at a time and upside down. the end, and use the second-hand of a clock to time it. Upside Down "Australia" why does that ring a bell  Seriously I tried it both ways and it worked for me! and he still didn't have his finger over the ends  |
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Post by enigmas on Jun 2, 2008 11:12:01 GMT
We'll it's good to hear guys that a more effective way was found.
Warwick perhaps I missed something (?...not paying enough attention) about your non-running vehicle. What exactly is the problem?
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Post by Warwick (Ozcoupe) on Jun 2, 2008 23:36:03 GMT
Vince,
I've replied to your other posts.
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Post by Warwick (Ozcoupe) on Jun 5, 2008 3:58:53 GMT
The only thing that annoys me about You-Tube is that the video file can't be saved to a local hard drive (perhaps someone here knows how to do this?). From time to time stuff is removed and the info disappears I've accidentally stumbled on one answer, Vince. I usually use MS Media Player for viewing video files, but Real Player has been lurking on my machine for ages. A few weeks ago I responded to a pop-up telling me that updates were available for Real Player. It has since annoyed me by popping up annoying celeb news items every day or so and I haven't yet bothered to tell it to rack off. But, while viewing one of the John Twist You-Tube clips just now, I happened to notice a little Real Player tab that popped up above the video window - and it said "Download this video" So I did, and it did. Now, if I open Real Player and click on the "My library" tab, there is a 7MB John Twist file. I haven't yet had a look to see how and where it is stored and in what format, and if it is able to be moved into another folder. |
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Post by enigmas on Jun 5, 2008 12:18:37 GMT
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Post by Warwick (Ozcoupe) on Jun 6, 2008 0:30:56 GMT
Thanks Vince, but that's not where mine went. I'll have to do a search.
The other advantage is that thanks to the news pop-ups, you won't have to wonder what Britney is up to at the moment. You're kept right up to date.
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Post by Warwick (Ozcoupe) on Jun 11, 2008 1:23:24 GMT
I've just revisited a site that I found about a year ago when first struggling with my SU problems. www.sw-em.com/su_carbs.htmIt looks like it's been there awhile and belongs to an American Volvo enthusiast. He's quite amusing and there is some interesting stuff. But I didn't dig very deeply into the site until yesterday. He has scanned an early Volvo P 120 service manual for a 2-litre engine. It can be viewed via a link or downloaded as a pdf file by right-clicking (save target) on the link. This 2-litre engine uses two HS6 SUs and the balancing and adjustment instructions and diagrams are the easiest to follow that I have seen. Far better than what Rover gave us, so very handy for an SU novice like me. I found the following bits of info particularly interesting ... The HS6 is not particularly sensitive to float level. If the float level is wrong, don't bend the arm - replace the float. When centring the needle, press the piston lightly towards the throttle butterfly because under normal operation, the air pressure is doing this. And most interesting of all ... To check the fit of the vacuum piston (a la John Twist). Remove the suction chamber and piston. Remove the oil and the piston spring. Replace the damper and screw in the cap. (no oil) Plug the 2 vacuum holes in the piston. Invert the suction chamber and let the piston fall back into the suction chamber. It should take 5 to 7 seconds. The site also has bits of info extracted from various sources including the Motorspeed SU tuning book. There is a bargraph showing the size of SU required by various engine capacities. Interestingly, the 2-litre 4-cyl Volvo had 2xHS6. It also shows the HS6 as being suitable for engines from 1500 to 3000cc. |
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Post by Deleted on Nov 27, 2010 8:48:49 GMT
Vince re Youtube copying if you hover over the top right of a YT video you will get a message saying download video. Click on that and it will download to your Real library. The Real programme needs to be downloaded first but is availaable free on the web.
Yes YT can be infuriating when you go back for something you like and its not there anymore. Best of luck!
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I dont know how much difference it will make 
