Jump to content

yoeddynz

Area Reps
  • Posts

    17309
  • Joined

  • Last visited

  • Days Won

    130

Everything posted by yoeddynz

  1. That's mighty impressive. Well done you. I'm going to have to up my game.
  2. Well after the last novel length wall of text I'll try to keep this update shorter otherwise I'll never finish the thing. Lots of little jobs starting to pop up on my 'to do' list. Driveshafts. Connecting the scooby shafts to the imp axles. A job I wasn't sure which direction I'd take as there's so many different ideas out there on the nerdnet showing 'the best' way to join shafts. First thing I did was to double check the suspension travel allowed by the stock shock absorbers and then use those datum points to work out if there was any growth in the length of shaft required as the wheel moves through it path up and down. There was minimal amount, like maybe 5mm at the very most. I guessed as much because the stock Imp driveshaft doughnuts dont allow for much sideways travel. I then cut one of my 22mm scooby shafts down in length so I could work out the lengths required with the CV joint in place. This move I soon regretted. I was allowing for plenty of plunge into the CV joints to make sure the whole joint could be removed from the box stub axle with the box pushed sideways when removing the transmission. I was happy with the length and then decided to go visit a local hotrod builder friend for some advise. He's well known about for his many many full scratch builds and has done heaps of driveshafts in his time (a fellow machinist by trade too) I showed him the two ways I was considering doing the join. He showed me a better way. Shrink some bored out yokes cut off from some spare axles. Plenty of meat, will never let go and even if they somehow did loosen and spin they cant come out because there's not enough travel in the CV joint to allow them to. No welding needed. He's run axles done in the same way with some serious big block power and they never let go. Just has to be accurate and luckily its the sort of machining/fitting job I like. But i needed to start with almost full length scooby shafts to do it, of which I was now down on.. Roll eyes and back to the wreckers to see this beauty get pulled from the hedge... Hannah helped me remove the shafts. It was her birthday too so wow, what a treat. She got visit the wreckers and get oily. Got home and the shafts didn't fit my CVs. Bigger diameter end. Really weird because I checked online... ha. It lies. Turns out some late 4wd Leones had even bigger axle ends than the imprezzas. Also odd is that one shaft is 22mm and the other side 24mm, although both the same length. Back to the wreckers. This time I got larger 25mm shafts with the smaller ends from front wheel drive Imprezzas. I grabbed two pairs. Same again, 22mm on one side and 25 on the other. Now I had two of each. Got home and spent some time cleaning them up, outside because petrol fumes. Cleaned up the spare pair of axles in the lathe to make sure I had an accurate clamping spot for the later boring. Good quality steel! I turned them down to less than the 23mm bore size and chopped the yokes off. Made lots of swarf Bored out to bang on 23mm with nice radius. Double checked and triple checked I had my lengths required correct. Chopped the two 25mm scooby shafts down to length and turned a step down on one end of each, a radiused step to stop any stress risers. I went for .0015"~.002" interference. Go online and see the debates between all the barries about what a good shrink fit should be There's many variables as well. I consulted my old faithful machinery's handbook. I wanted it tight, but not stressed. Luckily the axle is of good steel. I also made a sample first, using one of the cut off bits of scooby shaft and some 4340 I machined to the same outer dimensions as the yoke. This way I was able to test how hot I needed to get it to expand enough to drop in place. I'll take this to a local engineers who have a press with a pressure gauge and see how much force it takes to wreck this thing Here's about a one hundredth of a millimetre (iirc) getting removed.. Then things got hot.. photos taken after it was done because I had to move bloody quick! Hannah would grab the torch and I would drop the yoke in place. It was a tense bit of time. If the yokes teetered and grab they'd pull the heat so quick and shrink in place before getting to the shoulder. No removing them without damage and I only had the one pair of spare axles. It went well. I was happy and relieved. The light rust flashing off on one is simply due to that one having been left nearer the front of the workshop to cool down and it was a chilly damp start to the morning. They wired brushed up neat as, got painted with black epoxy and when that was set they had new universal joints fitted. I cant try them on the car until I remove the existing axles from the hubs but it should be fine. Next up was to sort the fuel tank out to suit fuel injection. I brought the blue imp in and checked a few ideas out on what I could do. I don't really have room for a surge tank and I never liked the noise on my Viva from the external fuel pump anyway. Nor did I like the way the fuel in the surge tank heats up. Enter the humble Nissan Micra k11 intank fuel pump and surge container... It actually looked like it was just going to fit into the pressed depression at the bottom of the imp fuel tank.. With enough room to run the imp fuel float sender next to it. Cut a hole.. It fits. I'll cut the bracket off the side at bottom of pic and it'll move sideways a bit more.. Made some metal brackets Welded them in and now I have a cradle that takes two cable ties across the top to secure. I needed a flange.... Made this. Its designed to recess the lid about 10mm below the tank top. I want to keep the tank top as flat as possible. It'll have the usual layer of foam over top but I don't want things sticking up proud when the 'frunk' is being used (cant be tearing those bags of concrete now eh....) Many holes drilled and tapped.. Carefully welded in place. Was a tricky job. Thin steel on the tank that had some sort of (probably poisonous) coating. But happy with result. I made another hole... That takes the sender. Drilled and tapped more holes to suit. Now I needed to get fuel from the outside in and from the inside out. I machined up these in stainless.. Thought of a neat way to hold the little bits together for tacking. Blue tack. Or blue tack tack? welded up.. I made an angled recess into the hatch cover so the fuel hose goes even further below the tank line. Visible in that photo are the cable connections. Again - I needed to get power in. I machined some shouldered fittings in plastic.. Luckily the micra pump so handily just uses a simple connector with 6.3 spade terminals. Under the lid... Tank hard work done. I'll paint bits and cut some gaskets. Speaking of gaskets. One of mine between my oil filter pedestal and the block is weeping oil. Plus one of the bolt heads weeps. Typical. Put a Japanese engine in a British car and turn your back for a minute... I've already drained the oil cleaned it up and ran a smear of paintable sikaflex along it and around the bolt head. I didn't take photos because not really exciting. I'll paint it silver and no one will know. Except you the reader. Next up is the exhaust I think.
  3. @GregT here's a forum thread on the bolt issue. Sounds nasty with regards to what can eventuate.. https://goldwingdocs.com/forum/viewtopic.php?f=23&t=67917
  4. I'd not be worried about that because one would still be stripping the engine right down and potentially cutting down the crank case/cutting off the transmission case like I did to lower the cg. There'd be no transmission to jam @NickJ I dunno and offset. I never really liked at that aspect but I have a feeling the crank centre line is inline with the bores and I can't remember seeing much, if any, offset on the gudgeon pins. But I guess there must be a bit of offset on the pins because the pistons are marked for fitment the correct way up. Not sure if the 1800s have hydraulic cam chain tensioners which could make things that bit more tricky. I have never looked into those engines myself but curious. They are pretty cheap to buy in the US and if 'easily' changed to clockwise rotation would be a neat engine for all sorts of applications.
  5. Fuck that's a clean looking shed!
  6. Regards the driveshafts. I chatted to my hotrod friend, ran the two ideas I had come up with and he suggested an even neater, stronger, failsafe way to do it. But I had to get another pair of scooby shafts because I'd already chopped the ones I had down in length I won't go into details here because I'll spend enough time doing that in the build thread but I'm super happy with the results. As for fuel tank, yeah since I've added a bolt down hatch to place the pump inside is now modified so I'll look for a suitable plastic box* for the battery (it's quite small though) I can't line my alloy box because I made it to suit the battery and it's bloody snug in there. I could line the outside but it would end up messy I bet. *off Alex goes - rummaging through the Sistema range of kitchenware/fuel tank/battery boxes at the warehouse.
  7. A friend in the UK was given an 1800 engine from a fire damaged bike. He's not properly looked at it (because he's always starting new projects and never finishes anything.. He should be on os ) but he reckons the camshafts could be run in reverse and by changing the chain tensioner location the engine could be changed to clockwise rotation. I have not really looked into those engines because it's hard enough finding a 1500 and an 1800 engine would be moonbeams from a wrecker. But they are lighter and have fuel infection already fitted.
  8. Oh for some reason I thought you were also using a bug shifter.
  9. Oh that's neat. @dmulally could for one in his imp with its bugbox
  10. Couple of questions that I need clearing up on. I have the lvvta manual and with regards to driveshafts I cant find any mention of halfshafts on IRS setups. I plan on joining 2/3rds Subaru leone shaft to 1/3 Hillman imp shaft (both same diameter) I'd like to do the job myself because I feel confident enough as an engineer. I am happy to have them crack tested if that's needed. I will be visiting my hotrod builder mate in motueka (who's well known with most certifiers) and running a couple of ideas past him. Does this all seem fine? Another thing I have spotted in the manual is this... 'Where a battery, and fuel system components, such as a fuel tank or fuel pump, are located within the same compartment in a low volume vehicle, the battery and the fuel system components must be separated from each other by the enclosure of one or both within a secured fuel-resistant non-conductive container' But at the start of the chapter on fuel systems it states this... 'Note that where a production vehicle is fitted with its original fuel tank or other fuel system components in their original locations, the requirements in this chapter do not apply' I have my battery mounted very securely within an alloy box above the tank, the box is bolted to the firewall. The leads are secured within flexible conduit that's attached to the firewall before running into the interior. I'll be using the original tank is but fitting the small nissan micra fuel injection pump within, through the top where I'll be making a sealed bolt down lid just large enough to get the pump in. (cant quite squeeze it through the hole the fuel level sender fits through) There's no room for a surge tank, nor do I want to go down the route of a noisy external pump again. Does this seem all ok ?
  11. 'Oh yay' half of oldschool proclaim as we roll our eyes. I didn't need to know that. Looks back to all those fun days wiring brushing off old dry underseal
  12. Actually our K11 gearbox has a decent leak. Spent too much time hanging out with the naughty British kid and learnt bad traits I suspect.
  13. This bit especially. The power of the British leak is a strong one and I guarantee this engine combo will leak.
  14. Yeah I should have mentioned that in the thread. Might point it out next time. Yes- there is a standard rubber cover on the imp shifter base that will still fit. I think it was pictured in the pic of barrys shifter. I'll just need to add a shoulder under the base (as seen in the bits I cut out) Then along the underside of the tunnel Imps normally have a full length cover that bolts in place. I say normally because I do have one but its been sitting in the frunk of the spare imp shell waiting for me to clean it up, paint it and fit it to the blue imp. It's only been since 2019.. I've not yet damaged anything in the tunnel but this new setup is more exposed so I'll definitely be fitting the cover up!
  15. Nice! ^ it's a fun job making stuff like that work eh! I'd love to have some sort of exposed shifter mech (think pagani ) along the top of the tunnel but for a semi daily road car, with a handbrake etc or would have been annoying. So double universals hid it all away.
  16. I glooped the two halves together, bolted them up, bolted the tailhousing on and let it set. Following morning it was bolted onto the engine, unsurprisingly a bit heftier with all the gubbins placed back within the box. Its about 9kg heavier than the standard imp box. I then started to fit the first part of the gearshift linkage. The first of those snazzy universal joints, handily available in a diameter to suit the shifter shaft on the Subaru box. I just needed to add a small locating hole for the grub screw... Universal in place.. Engine and box were then bolted back into the car. This bit is so quick and easy when using the 'engine stand 2000'. It takes about 10 mins and I'm getting quicker. It'll be slower when there's shift linkage to undo and driveshafts to slip out of the way. But at least the main heavy awkward part is actually easy. That lot in place I took some pics. Its neat to be able to look out from the one of the lounge room windows down onto the workshop floor and see this... With that lot in place I was able to suss out the angles I could get away with, as shallow as possible and allowing for the handbrake mechanism. I had this old imp gearstick assembly that @dmulally kindly posted over to me. Some previous owner of the car he got it from liked painting things. Everything. Multiple times... I scraped all the layers off, took it apart and cleaned off the dirty old grease. Discovered it had been cobbled together from two old shifter bases. It was originally a very early Imp unit when the very first cars had an automatic choke, which often proved problematic. Hillman then changed the cars over to a manual choke with a nifty little lever in front of the shifter. This mount had been added to the early base. Which means they must have chopped up a later baseplate to get the choke mount. Why they didn't just fit the entire newer base plate I don't know. But what I had in front of me was a frankenstein of base plates with barry spec welding and fixes, but also including a not too badly made bronze bush on the lever where there is normally a (wornout) plastic bush. I had a couple of shift rods to choose from. I chose the least worn. Moving back to the gearbox end I machined up some shaft ends from stainless bar to suit the universal joints. I had some stainless tube and welded the ends in place on the first shaft that runs from the gearbox universal down to the tunnel. Now I needed a sturdy, slippery support to mount in place of the second universal joint. This will not only take back and forth movement on the shaft but also a bit of thrust loading created by the angle on the connecting shaft. I had already bought a lump of slippery hard engineering plastic with this application in mind when I had ordered the plastic for the flywheel thrust bearing a while back. It was bright yellow. Luckily not seen under the car as it would clash with the blue paint. I put a hole in it and machined the outside down. Which also created a pile of pretty swarf.. Then reamed it out to 1" Still a bit tight so out with the adjustable reamers.. until it was just right... Then made a stainless cradle .. The cradle got some wings welded in place and I dug the rivnut tool out.. Mount now bolted in place in the tunnel I had to chop the last tube to the right length, weld on the end and bolt the universal in place.. The front end below the shifter was was standard imp stuff and this is where problems popped up to throw a medium sized spanner in my workings. The side to side gearstick movement across the gate was minimal. Ridiculously so. Like about 1". Or 25mm in new money. Yet the fore and aft movement was about right. But quite stiff. I was contemplating why this was so and what I could do to remedy this when I also noted that 1st gear was where 3rd was and 3rd was where 1st was. Poos. Four years ago when I had compared the Subaru gearshift pattern at the box to the imp unit I thought they were exactly the same. But I had not accounted for the reverse rotation taking place under the imp gearstick. Also I never really thought much about how little of rotation the Subaru box needed on its shifter shaft to shift the internal selector across the 3 rods. Its a tiny amount, like 3 degrees say. Whereas the Imp box has a shorter internal selector and requires more rotation at the shaft. Hence the Imps gearstick knob only moves a teeny bit when coupled to the Subaru box. But the Subaru box has a standard/similar amount of rod movement within (ie 1-2 and 3-4th) which was going to make things trickier to fix. Simple linkage/leverage multiplications that is easier to see than explain. Sorry if your brain hurts. I had to hurt my brain a little bit to suss out a solution but there was only a little bit of smoke. The reason the scooby box is different becomes obvious when you see the scooby shifter setup. Which luckily I can show you because last week thanks to @Leone I was put onto a local fella to me who happens to have many old Leones and Brats kicking about his property and he had a spare leone front wheel drive box that I wanted (always handy just in case...) His property is amazing!!! Long 4wd only driveway up to a ridgetop house with stunning views out over Tasman Bay. Old leones just kicking about... Luckily we have our trusty old 4wd Hiace and that became the days gearbox transporter... Box on bench. Look at that shifter mechanism... The shifter rod attached to the gearstick only rotates a tiny amount when the stick is moved sideways across the gate. But the rod moves 10mm in each direction when shifting for and aft. Simple. Robust. Very Subaru. I can't copy it though because I have turned my box 180 degrees. No matter where I put my pivot point (below or above) I'll have one of the planes working backwards. So I decided to build a new shifter base setup. The most important thing was to reverse the rotation so the gearstick pattern is correct. The imp pivot point needed raising to allow the offset shaft end to be rotated to above rather than below the centre line, so reversing the across gate movement. I would add the ability to adjust both rotation and lineal movement. Started with a new pivot cup because I was not happy with the worn and Barried pressed steel item.. I dug out a large lump of steel bar... Chopped out a square and cleaned it up in the mill.. Big drill = big hole.. Rough machined out a cup shape. Cut a form in cardboard to suit the brass ball and used a die grinder bit to finish the shape... Grinding paste time... Slots for pivot pin.. Lightened the lump down.. Built the shaft up with weld and machined it down so I could add a lower pivot point. Milled some steel like so.. Welded a boss on.. New socket for shift lever ball end... Cut out Barrys previous workmanship... Machined up some spacers and a base plate.. Welded up a little tower (my stainless and steel tig welding is definitely improving, helped muchly by realising that not being able to see what I'm doing does not help much and finally admitting to my age and buying some reading glasses....) Welded tower to base.. Now all together please... Bolted together. You can spot the adjustable rotation, which the spacers allow for, along with adjustable pivot point. In place... Yay- it works! The shift pattern is correct and the action is much smoother. The spring loaded indents on the internal gearbox shift rods are quite stiff, which I noted was the same on the other box with its stock shifter. Its a bit baulky to push past the synchro baulk rings into gear but I think will feel better when the gears are actually rotating. There's certainly no slop in the system and it feels very mechanical - not rubbery. I now note how much flex there is around the shifter base in the imps tunnel (granted a very rusty shell..) Its something I might just try to stiffen up on my blue Imp when fitting this lot in. Phew. That was a little mini engineering mission I was not expecting but that's this project in general
  17. Ha. So pretty much the day after I had cleaned up that old alternator up and got it running on the engine the second hand replacement for my original unit turned up in the post. It came with a 3 month warranty so I'd better check it works before stripping the engine of its ecu etc. Started to fit it and oh.. Poos. It wont fit. So I took it apart, along with the original.. Discovered its just the front housing that's different and I can swap them across.. So while its apart it would be rude not to clean all the parts up and polish it all (tempting fate just a bit...) Fitted to the engine and started it up. Yay - it works and it looks great, which is really quite important given its right there, in the middle on display. I'll keep the other one in storage just in case I need it one day. Now I could strip the engine back down, removing all the cooling, wiring and fuel lines that I had installed just for bench testing. Then I removed the transmission and put the engine back onto the engine stand 2000, stashing it away because its gearbox tinkering time. This Leone transmission has a few little issues that need sorting out in order for it to run in reverse rotation and not potentially turn itself into an expensive insinkerator or coffee grinder. I could probably get away without doing these modifications because the box is overbuilt for the application but I wanted peace of mind. Remember I had acquired the two gearboxes, 1600 and 1800 items, before getting the engine. Ages ago, in fact 4 years ago I think!!! I had wanted to know if it was feasible to run these boxes in reverse. This pic I posted up way back then gives a good idea on what's going on inside... I had already worked out some of the issues back then and knew what I was up for. With more study I found a couple of other areas that need addressing. Here's another bit of wonderful scribbling I did this evening.. The pink arrows show the new axial forces that are being imparted onto the main (driver) shaft and pinion (driven) shaft. The circles are areas that I think needed attention to make sure it doesn't throw it toys from the cot. 1 : the blue circle. Under high torque loads this area could possibly create the sound of nashing teeth but with much messier consequences. The top left one being the third gear driver wants to move to the right and clip the teeth on the bottom right second gear. In normal rotation they would move apart. There's 1mm of clearance there which is probably enough tbh. But I wanted a bit more and had already worked out how I could get it with no other issues and just a bit of tool making. Which is fun. 2 : The yellow circle. This ring was no going to take thrust loading. It is a strong ring and has a deep groove but I wanted to make sure there was no way it could ever shift. 3 : the green circle. In this area there is a thrust bearing that also acts as a neat little oil pump and squeezes oil through the gear hubs/bushes. Under the new loading the thrust aspect is removed but I still wanted to it pump oil and it was going to be the wrong shape to do so in reverse rotation. So I set to work and checked off each job. I made a bolt holder for ease of reassembly - several different sizes and lengths. Once apart I started with the gear side clearance. First off I needed to split the mainshaft assembly down. 4 years ago I had out of interest tried using a puller on the spare 1600 box, which shares the same layout and design but with smaller parts in many cases. The puller didn't work. But this time round I have the rather handy workshop press I made. I just needed some extra tooling to do this job. Starting with some press plates... Allowing me to carefully press the shaft out... Because I'm not posh (or rich) enough to own a surface grinder I needed to make one. Yes its a bit basic but it will work. I made this... Which allowed me to do this.... I ended up with this gear having the 0.5mm more clearance I wanted. Super happy with the result. Now onto number 3 - the little oil pumpy thingee. I went to my friendly engineering workshop in town and got a big lump of 4140 steel. I drilled it out... Machined out a ring which had to be an exact width. Just in case it needed finishing after the hardening process I made an abor to take it.. I carefully machined it to the right profile, cut the sides down and filed the shapes in, just like the original but in reverse. Happy it was going to work I heat treated it. I have not done any heat treating for over 25 years since I spent a fair bit of time in the blacksmith department while doing my apprenticeship. But it wasn't a super loaded critical component and just had to have a durable hard surface. I didn't take any photos. Hannah was there helping as I carefully heated it up with the oxycet to the austenitic stage and agitated it in some lovely rice bran oil (because I can be posh sometimes) then slapped it in the oven to temper it... Following morning I polished it. It came up sweet and the old file test showed it to be as hard as the oem item. You can see the reversed design here... Here's a little vid I took showing it in action... While stripping the mainshaft down I was also pleasantly surprised to discover that this 1800 box has needle bearings in all of the gear hubs unlike the 1600 box which uses bushes on the mainshaft. So oil starvation would not have been as much of an issue but I'm still really happy I did this modification. Last issue to sort was number two - that ring on the bearing. It would hold fine I'm sure but if could make it bulletproof then why not - it's just a bit of extra machining. I started with another lump of high tensile steel and machined out a ring to suit... This fits over the other ring and then the main thrust plate that sits over the bearing was machined out to suit my reinforcement ring. Its all held in place by the end housing which I have yet to fit. All the potential issues covered I set to cleaning out the casing and then started reassembly. In doing so I discovered that the original axle seals are sided on these boxes. They have those helical lines on the lip surfaces which aid in pulling/pumping oil back into the oil side of the lip ( the lip does not actually touch the steel when the axle is moving and in fact runs on a tiny bed of oil) which I had not realised before I'd bought plain lip seals from an engineering supplies. This pumping capacity is shown to be twice as high in helixed seals. Subaru fit left and right handed items. But I'm running mine in reverse. Luckily the originals were in excellent condition anyway so I machined up a stepped tool, popped them out and swapped them to the other side. The diff axle seal surfaces came up good after a clean. Cute little diff.. I'm now about ready to put some 3 bond gloop on the case half and drop the other side in place. Its looking all very nice, clean and shiny in there...
  18. yeah that's fucking cool Dan. Thanks for sharing!
  19. I was worried about ending up with a similar issue with my old innovate on megasquirt so I added a switch to turn off the wideband if I had to have the ecu/ignition on for any length of time without starting the engine. I'll be doing the same for my current setup when installed (I've just been pulling the fuse while bench testing for now) Sorry for thread hijack. As you were...
  20. There's a nicely patina'd one of these dailying about motueka but it's a 4wd with a V6. It looks and sounds cool as fuck. I lived in a mk2 (jumbo spec with dual rears) for 2 years. Pinto powered. Drove it some long distances on UK motorways. Can't remember it being overly low geared though. Guessing the mk2s has higher ratio options you could look out for?
  21. Couldn't stop there. Need a place for coffee mugs.. It's a nice little spot now. We are owed a whole load of macrocarpa from a customer so will soon build bench seating along the back.
×
×
  • Create New...