The reasonably priced engine conversion.

Larger 4 cylinder engines, body mods, major brake and handling modifications.
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Stevebee
.
Australia
Posts: 8
Joined: 4 years ago

Re: The reasonably priced engine conversion.

Post by Stevebee »

Did you solve the engine light problem



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welltravellered
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England
Posts: 49
Joined: 7 months ago
Location: Cheshire

Re: The reasonably priced engine conversion.

Post by welltravellered »

Stevebee wrote:
2 months ago
Did you solve the engine light problem
I thought I had. It's only come back on once since I fitted the spacer to the downstream o2 sensor.



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welltravellered
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England
Posts: 49
Joined: 7 months ago
Location: Cheshire

Re: The reasonably priced engine conversion.

Post by welltravellered »

I wasn't too proud of the exhaust system so I re-did it with the Liana manifold and most of the Liana system.

4 into 1 Manifold.
20200619_142431.jpg
20200619_142431.jpg (246.42 KiB) Viewed 371 times
20200619_142431.jpg
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Original image recording time:
2020:06:19 14:24:31
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Fri Jun 19, 2020 1:24 pm
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Samsung
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SM-J530F
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I made a downpipe to link it to the Liana middle box.
20200619_142514.jpg
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20200619_142514.jpg
EXIF-Data show/hide
Original image recording time:
2020:06:19 14:25:14
Image taken on:
Fri Jun 19, 2020 1:25 pm
Focus length:
3.71 mm
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F-number:
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Samsung
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The Liana mid pipe was a surprisingly good fit, right to above the axle. I hate welding pipe so this was a bonus. The sharper bend near the axle suited the revised position of the handbrake cable.
20200610_191020.jpg
20200610_191020.jpg (445.8 KiB) Viewed 371 times
20200610_191020.jpg
EXIF-Data show/hide
Original image recording time:
2020:06:10 19:10:20
Image taken on:
Wed Jun 10, 2020 6:10 pm
Focus length:
3.71 mm
Shutter speed:
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F-number:
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ISO speed rating:
400
Whitebalance:
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Camera-manufacturer:
Samsung
Camera-model:
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Put on a 2 bolt flange so I can easily swap back boxes.
20200618_154555.jpg
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20200618_154555.jpg
EXIF-Data show/hide
Original image recording time:
2020:06:18 15:45:55
Image taken on:
Thu Jun 18, 2020 2:45 pm
Focus length:
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F-number:
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Samsung
Camera-model:
SM-J530F
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Finished it off with a stainless back box.
20200701_194013.jpg
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20200701_194013.jpg
EXIF-Data show/hide
Original image recording time:
2020:07:01 19:40:13
Image taken on:
Wed Jul 01, 2020 6:40 pm
Focus length:
3.71 mm
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F-number:
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Samsung
Camera-model:
SM-J530F
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Fitted the Liana heat shield for that factory look.
20200619_142725.jpg
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20200619_142725.jpg
EXIF-Data show/hide
Original image recording time:
2020:06:19 14:27:25
Image taken on:
Fri Jun 19, 2020 1:27 pm
Focus length:
3.71 mm
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F-number:
f/1.7
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Samsung
Camera-model:
SM-J530F
Exposure program:
Normal program
Exposure bias:
0 EV
Metering mode:
Center-weighted average
This has made a noticeable difference to power above 3000 RPM and it isn't that much louder. Result.



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Stevebee
.
Australia
Posts: 8
Joined: 4 years ago

Re: The reasonably priced engine conversion.

Post by Stevebee »

It’s been interesting following your progress.



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MM
.
United Kingdom
Posts: 3805
Joined: 9 years ago

Re: The reasonably priced engine conversion.

Post by MM »

Very nice work indeed. 8) What sort of fuel economy figures can you now achieve?


Maurice, Kent.
1970 Trafalgar Blue Traveller

http://retrorides.proboards.com/index.c ... read=37056" onclick="window.open(this.href);return false;

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welltravellered
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England
Posts: 49
Joined: 7 months ago
Location: Cheshire

Re: The reasonably priced engine conversion.

Post by welltravellered »

MM wrote:
2 months ago
Very nice work indeed. 8) What sort of fuel economy figures can you now achieve?
Not sure. I've only filled the tank once, and I ended up siphoning half a gallon out due to a slight leak from the fuel pump. Rough calculations show it was 38 mpg ish. I'll keep you posted as I do obsessively monitor fuel consumption normally. Just not going very far at the moment due to lockdown.



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MM
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United Kingdom
Posts: 3805
Joined: 9 years ago

Re: The reasonably priced engine conversion.

Post by MM »

Understandable. How do you find the clearance between the rear tyres and the inner wings with the MGB axle? On my twin-cam Minor, the tyres slightly rubbed going over bumps, so I had to fit spacers. 185-width tyres may have had something to do with it though!
Image


Maurice, Kent.
1970 Trafalgar Blue Traveller

http://retrorides.proboards.com/index.c ... read=37056" onclick="window.open(this.href);return false;

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welltravellered
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England
Posts: 49
Joined: 7 months ago
Location: Cheshire

Re: The reasonably priced engine conversion.

Post by welltravellered »

The A55 wheels have a smaller offset than MGB ones so there is enough clearance at the inner wheelarch. The A55 wheels have a 10mm offset and I think MGB wheels are 25mm or something. Plus I've only got 155 tyres on at the moment, when I get round to buying some tyres I'm going to have 165 tyres on the back with the 4.5 inch rims. I don't anticipate any clearance problems.



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welltravellered
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England
Posts: 49
Joined: 7 months ago
Location: Cheshire

Re: The reasonably priced engine conversion.

Post by welltravellered »

Whilst the speedo seemed to work, the numbers were constantly changing up and down by 3 - 4 mph. Suspecting interference from the adjacent fuel pump wiring, I made up a temporary loom to see if running it separately made any difference. It didn't. The only other obvious thing to suspect was the way the sensor reads off the propshaft nuts, my theory being that the 'dwell' was too small, ie if you consider the rotation of the flange, there is a big gap, followed a relatively short period where the nut is in proximity to the sensor. As nobody wanted to buy the Liana gearbox I stripped it down to have a look at the trigger wheel. It actually has 15 teeth, not 16 as previously suspected.
diff.jpg
diff.jpg (205.25 KiB) Viewed 232 times
diff.jpg
EXIF-Data show/hide
Original image recording time:
2020:07:10 15:41:11
Image taken on:
Fri Jul 10, 2020 2:41 pm
Focus length:
3.71 mm
Shutter speed:
1/25 Sec
F-number:
f/1.7
ISO speed rating:
500
Whitebalance:
Auto
Flash:
Flash did not fire
Camera-manufacturer:
Samsung
Camera-model:
SM-J530F
Exposure program:
Normal program
Exposure bias:
0 EV
Metering mode:
Center-weighted average
Importantly, what I discovered was that the gaps are the same size as the teeth, giving a 50% duty cycle. My 4 tooth trigger wheel would have to be the same, so I made one out of a 100mm disc (I bought 2 when I made the in tank pump flange). This bolts onto the back of the pinion yoke.
sensor 2.jpg
sensor 2.jpg (409.38 KiB) Viewed 232 times
sensor 2.jpg
EXIF-Data show/hide
Original image recording time:
2020:07:02 16:34:55
Image taken on:
Thu Jul 02, 2020 3:34 pm
Focus length:
3.71 mm
Shutter speed:
1/33 Sec
F-number:
f/1.7
ISO speed rating:
200
Whitebalance:
Auto
Flash:
Flash did not fire
Camera-manufacturer:
Samsung
Camera-model:
SM-J530F
Exposure program:
Normal program
Exposure bias:
0 EV
Metering mode:
Center-weighted average
sensor 1.jpg
sensor 1.jpg (317.3 KiB) Viewed 232 times
sensor 1.jpg
EXIF-Data show/hide
Original image recording time:
2020:07:02 19:03:46
Image taken on:
Thu Jul 02, 2020 6:03 pm
Focus length:
3.71 mm
Shutter speed:
1/33 Sec
F-number:
f/1.7
ISO speed rating:
200
Whitebalance:
Auto
Flash:
Flash fired
Camera-manufacturer:
Samsung
Camera-model:
SM-J530F
Exposure program:
Normal program
Exposure bias:
0 EV
Metering mode:
Center-weighted average
Ignore the extra wiring connector. It works a lot better now, although I've only gone up to 50mph so far.



User avatar
welltravellered
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England
Posts: 49
Joined: 7 months ago
Location: Cheshire

Re: The reasonably priced engine conversion.

Post by welltravellered »

It has an annoying vibration at tickover, and it's possible to make the clutch slip in certain circumstances. I put this down to the fact that I fitted the 1.3 flywheel and clutch. The 1.6 engine has a larger flywheel (1 kg heavier) and the diameter of the clutch friction plate is 10mm bigger. I got it MOTd and then pulled the engine out to investigate fitting the Liana clutch and flywheel. I found a couple of issues:

1. The flywheel is 6mm thicker so the clutch release bearing needs to be 6mm further away, also the centre of the clutch driven plate binds on the 'nose' around the input shaft.
2. The Jimny release bearing is a smaller diameter than the Liana one one so the fingers on the diaphragm spring don't fully line up.

Issue 1 could be solved by making a 6mm spacer for the bellhousing, but then I would need a shorter propshaft, and I would have to redo the gearbox crossmember and massage the gearstick hole. Issue 2 I'm not too sure about. It looks like the release bearing should be ok with the larger clutch. Too much work for now so I put the Jimny clutch and flywheel back in. There was evidence that the clutch hasn't fully bedded in yet so I'll wait and see if the slipping situation improves. Uprated clutches are available for the Jimny too. I might revisit this in the future.
20200813_113453.jpg
20200813_113453.jpg (261.46 KiB) Viewed 139 times
20200813_113453.jpg
EXIF-Data show/hide
Original image recording time:
2020:08:13 11:34:53
Image taken on:
Thu Aug 13, 2020 10:34 am
Focus length:
3.71 mm
Shutter speed:
1/50 Sec
F-number:
f/1.7
ISO speed rating:
100
Whitebalance:
Auto
Flash:
Flash did not fire
Camera-manufacturer:
Samsung
Camera-model:
SM-J530F
Exposure program:
Normal program
Exposure bias:
0 EV
Metering mode:
Center-weighted average



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