logicaluk
Posted a lot
Every days a school day round here
Posts: 1,373
|
|
Jul 14, 2022 18:57:07 GMT
|
today I recived the cylinder head back, I couldnt be happier. and the valves and springs 1 step closer, next I need to dig out, manifolds, carbs and the old throttle body setup Dan
|
|
|
|
|
logicaluk
Posted a lot
Every days a school day round here
Posts: 1,373
|
|
Jul 13, 2022 21:23:12 GMT
|
I once put my aft gauge on a mate's car and went for a drive trying to hold certain engine conditions load and speed to build a map of the needle and then figured out what it wanted, then I used minty lambs excellent SU needle compareOrama to figure out a better needle. A lot of fun and a pretty quick car afterwards. link to Minty Lamb's SU Needle CompareOramaDan
|
|
|
|
logicaluk
Posted a lot
Every days a school day round here
Posts: 1,373
|
|
Jul 13, 2022 18:01:10 GMT
|
I didn't know the made an estate, was it used as a mobile shed?
|
|
|
|
logicaluk
Posted a lot
Every days a school day round here
Posts: 1,373
|
|
Jul 12, 2022 19:14:28 GMT
|
I just want to say great car, love the way your thinking about repairs vs modifications. I've got a hankering for a prewar car but I don't see one in my future any time soon. Keep up the good work. Dan
|
|
|
|
logicaluk
Posted a lot
Every days a school day round here
Posts: 1,373
|
|
Jul 11, 2022 18:49:24 GMT
|
Later this month, I am taking a trip to visit Darkspeed and his flow bench, to see how well the acclaim head flows, and see if there is a flaw in the setup. The first thing to do was build a valve lifting jig, the acclaim has a 34 deg roof, the jig will bolt to the camshaft fixings and needs to have a 17 deg angle, I have to confess I didn't use CAD instead I went straight to steel, and made this. Today I cleaned up the head starting with the valves, all the bases, springs, retainers and collets had a bath in some stale petrol in a container in the sonic cleaner. I started by jet washing the head and spraying it with degreaser, a neighbour walked by and asked what it was from then offered to take it to work tonight and put it in the tank at work. We will see how it looks tomorrow. The valves were brushed up, on the bench wire wheel. And they cleaned up nicely. But my phone battery died, so I can't prove it today.
|
|
Last Edit: Jul 11, 2022 18:54:52 GMT by logicaluk
|
|
logicaluk
Posted a lot
Every days a school day round here
Posts: 1,373
|
|
Jul 10, 2022 20:57:57 GMT
|
There's nothing like a spot of motor sport to get the mojo going, thanks to frank driving like a sack, I spent a very pleasant day navigating in an early MK1 MX5, doing the Caves Classic Run a 4 hour 70 mile navigation event with tulip maps timed at 24mph, in which we came 3rd with an average speed of 24.3 mph. It was bloody good fun.
When I got home, I went to see Frank.
When the Micro Squirt popped its fuses (I've still not got a definitive test on that), I fitted a dizzy with a Lucas vac advance unit bodged on fitted, the reason for this its the one part that's made of 100% pure unadulterated unobtainium, I can't remember when I last saw a good manual spec one, so I had a go at making a Lucas one work.
I've got a good triomatic vac advance unit, but the curve is somewhat different and from what I recall the trio ones don't drive as well as the manual ones.
Vac advance Manual vac advance starts at 120 mmHg and finishes 13-17 degs at 225 mmHg Trio vac advance starts at 200 mmHg and finishes 4-8 deg at 275 mmHg
base timing vac connected manual 5 deg trio 12 deg
I've also found a 1984 Honda prelude advance unit for sale, but I don't know the spec.
Typing this has jogged my memory, now I'm pretty sure it doesn't go in on the stock set up marks, oops, Ill have another go at re-timing it one evening. dan
|
|
Last Edit: Jul 10, 2022 21:06:24 GMT by logicaluk
|
|
logicaluk
Posted a lot
Every days a school day round here
Posts: 1,373
|
|
|
In a few weeks time, I'm planning to visit darkspeed and his flow bench to assess the acclaims breathing, to achieve this a bracket is required to act on the valve The head will get a clean-up next, but that will be over on my acclaim thread.
|
|
|
|
logicaluk
Posted a lot
Every days a school day round here
Posts: 1,373
|
|
|
|
|
|
|
logicaluk
Posted a lot
Every days a school day round here
Posts: 1,373
|
|
|
I've wanted one of these for a long time, who wouldn't, when mrbadger bought it I said, if you ever decide to sell it call me. When he bought it, both green screen CRTs worked when he got it home only one was working, the right side which the computer reads out on decided to have a nap, so he sourced a standards' converter to take the MDA signal to VGA, and shortly after found a smaller older version he really wanted and called me. My first reaction was to fix the chassis mounted CRT, but having seen it working on an LCD it got me thinking, I've got a VGA switch in a box of bits I was about to throw out, (I know it made me shudder too, but I need the space and I can't keep everything (so I've been told)), If I could find an LCD monitor that would mount inside the cabinet, there would be plenty of space for a mini PC, which could prove to be a very useful tool with all the workshop manuals etc on it and even more so when I eventually run the Cat6 out there for the internet. I have the original paper manual as well as a PDF copy, but does anyone have a service manual for it? Some of the gas analyser functions are calling for calibration, as well as the Volt/Ohm probes. To be honest, I didn't have the time to check it over as well as I could have, I'll post some more pics of it with the back off next time I'm out there, but for now have a pic of it lit up in all its awesomeness. Dan
|
|
|
|
logicaluk
Posted a lot
Every days a school day round here
Posts: 1,373
|
|
|
Hopefully typing this out, will help it make sense. I took the carbs off to test a known good set on a mates car, worked fine. Fitting the original ones off his car to check them, (he had swapped them out for a spare set) they would barely run.
Whilst getting ready to fit them I saw a spark in the engine bay and the smell of ozone, and the main fuse Wendy away, strange thing is I can't figure out what would be live there with the ignition off, afterwards everything seemed fine, fired up, drove 1 car length and stopped this time taking out the microsquirt fuse, unplugged everything connected to the microsquirt loom and it still blew the fuse, unplugged the microsquirt from the loom and it's ok, so it's not in the feed side. I'll have to go over it with a multimeter tonight. Dan
|
|
|
|
|
logicaluk
Posted a lot
Every days a school day round here
Posts: 1,373
|
|
|
Very interesting. What were you doing when it went lean? Personally I've never really heard detonation before, but 'jangling noise' fits what other people have described. IIRC Under load, driving up a slight hill at partial throttle can't remember how many RPMS but I think it would have been mid band 3.5k ish.
|
|
|
|
logicaluk
Posted a lot
Every days a school day round here
Posts: 1,373
|
|
|
Found it scales read, 50 imperial units of lift per div, across the bottom, 10 cfms @10" per div up the side the rest of the article, including the all important scales, is here GT's intresting head work
|
|
Last Edit: Jun 5, 2022 20:25:50 GMT by logicaluk
|
|
logicaluk
Posted a lot
Every days a school day round here
Posts: 1,373
|
|
|
When I go and collect the engine I will pick up a few cylinder heads to put on the flow bench. I have never seen any flow figures for the Imp engine so it will be interesting work. For me anyway. IIRC Gareth Thomas referenced some cheesman head flow data. Can't find it at the moment must be on my laptop. Dan
|
|
|
|
logicaluk
Posted a lot
Every days a school day round here
Posts: 1,373
|
|
|
Yesterday I managed to get it to make the noise, and notice it went very lean 17.3 was the worse I saw, which is odd seeing as every where else it's numbers are pretty much perfect, idles around 14.7 and 12 ish on power, more information required. A run out with data logging will help. Dan
|
|
|
|
logicaluk
Posted a lot
Every days a school day round here
Posts: 1,373
|
|
|
Another small update, more parts have been collected, a stainless exhaust back box and some stainless pipe for £10 & a pair of used K&N filters for £25, Picked up at a car show. 2 Pairs of MX5 seats, one pair heated from a mate. And a stag fuel filler That, when paired with a spitfire fuel tank, should fit here
|
|
|
|
logicaluk
Posted a lot
Every days a school day round here
Posts: 1,373
|
|
|
*Photos or it didn't happen - always nice to see what people are up too even if on a 'modern' Neighbours dad has just bought a blue Triumph Acclaim which is minty mint, must get a photo to share ! James I love acclaims such fun things to drive, if you pedal them at their limit they will do it all day long, as long as the breaks don't cook, (ask me how I know)
|
|
|
|
logicaluk
Posted a lot
Every days a school day round here
Posts: 1,373
|
|
|
Good news, compression test shows 200psi across the board, plugs look like this I'm running BP6ES's as instead of the stock BP5ES with a 0.8mm plug gap All sounded well on a drive, and much better after an oil change, couldn't make it detonate even going 50-70mph in 5th. I even remembered to take the laptop and got a data log, if anyone wants to see it, message me and ill email it.
|
|
Last Edit: Jun 3, 2022 15:25:59 GMT by logicaluk
|
|
logicaluk
Posted a lot
Every days a school day round here
Posts: 1,373
|
|
May 31, 2022 21:29:03 GMT
|
Probably going to make my self look daft, but When I say detonation, I heard what I can only describe as a jangling noise in (I assume) the exhaust. I don't recall the AFR going leaner than 16.
|
|
Last Edit: May 31, 2022 21:30:29 GMT by logicaluk
|
|
logicaluk
Posted a lot
Every days a school day round here
Posts: 1,373
|
|
May 23, 2022 20:42:32 GMT
|
This weekend has been very disappointing, frank towed my tiny caravan up into the North Yorkshire Moors, he wasn't happy, I think there was some detonation, if I had taken my laptop I could have at least tried a different ignition map, but I wouldn't be surprised if I've done some damage to the engine, oil pressure seems OK. I'll have to go over it one evening, I had to get back as I had a job interview, which I got and should put me on a far better financial keel, and some actual money for this project.
|
|
Last Edit: May 23, 2022 21:38:56 GMT by logicaluk
|
|
logicaluk
Posted a lot
Every days a school day round here
Posts: 1,373
|
|
May 23, 2022 20:22:16 GMT
|
I suppose with injection you could use the same manifold for NA or a turbo application so that would be a step forward whichever option you choose. If you can get a wideband in there then you might be able to get some info about whether the changes you're making are improving things or not. It's not quite a rolling road, but by and large if the AFR changes for the leaner on a MAP or alpha-n setup then you're getting more air into your cylinders/better combustion in that rev range. I've chucked the specs for an EN4 into my little engine internals spreadsheet and it's coming out at 20.5m/s mean piston speed at 7500rpm which is respectable but likely attainable. If it'll breathe that high up then you should be able to make decent power. Was that rolling road picture with the standard cams or Newman ones? Darkspeed do you know if you can see valve float in a corrected dyno chart? I know you can on the uncorrected ones as the power starts to get really choppy. I have a wideband, IIRC the dyno run was on the Newman cam, set up on the timing marks, not in the normal acclaim set up position which is half a tooth out.
|
|
|
|
|