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1
Garage / Re: Fuel Tank Sender Unit
« Last post by dakazman on Today at 08:36:19 AM »
  My S2 sender new from a vendor had a intermittent open, when I first received it here,
 https://www.lotuseuropa.org/LotusForum/index.php?topic=2058.705
   and later found this;
  https://www.lotuseuropa.org/LotusForum/index.php?topic=2058.705https://www.lotuseuropa.org/LotusForum/index.php?topic=2058.795
   It works now.
Dakazman
2
Garage / Re: Rear Deck Struts
« Last post by dakazman on Today at 08:20:15 AM »
  Will check back through my copious emails, Joji...know it's around somewhere...;)  between the 2 FB europa lists, groups.io, and here...sometimes knowing where you interacted is a bit frightening, LOL
   :FUNNY: :FUNNY: :FUNNY:
   You can wait a bit but Please include me also.
Dakazman
3
Garage / Re: Rear Deck Struts
« Last post by Bryan Boyle on Today at 08:14:09 AM »
[quote author=Bryan Boyle link=topic=6566.msg70838#msg70838 date=1717256771

Will check back through my copious emails, Joji...know it's around somewhere...;)  between the 2 FB europa lists, groups.io, and here...sometimes knowing where you interacted is a bit frightening, LOL
[/quote]

Sent you both PMs...didn't want to spam the list without the producer knowing...and suddenly gets innundated  if anyone wants the info, LMK and I'll PM you.
4
Garage / Re: Fuel Tank Sender Unit
« Last post by 4129R on Today at 07:12:07 AM »
Fun with math, sure...

You have a number of baked in assumptions that make your calculations suspect.  For example:

You are assuming linear travel gives linear effect.  This unlikely as the variable resistor is wrapped wire.  Some are even deliberately wired asymmetrical.

The gauge readings are not linear, I assumed that was to correct the arc v straight line conflict. There is a similar disparity on the temperature gauges, which I thought was to correct non-linear variations.

The same again for tank volume.  Determining how many gallons will result in "x" inches of increase in surface height is best done by experiment with a calibrated measuring container.

The tanks are uniform cross section, so I believe this is a reasonable assumption.


Finally, gauges are calibrated to read empty and still have some fuel remaining for good reasons.  The most obvious being, to make sure you do not run out of fuel even when you are not paying proper attention.  Also water and contaminants tend to collect in the very bottom of the tank.  The intake is often set a bit higher than you might think to avoid sucking this muck up.  No point in measuring what isn't actually available.

I have measured the pipe at the bottom, and it is only about 10-15mm from the base.
5
Members Cars / Re: New S1B owner
« Last post by jbcollier on Today at 06:17:38 AM »
The amazing thing is that you were prepared to machine your pistons based on figures pulled off the internet.
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Garage / Re: Fuel Tank Sender Unit
« Last post by jbcollier on Today at 06:13:09 AM »
Fun with math, sure...

You have a number of baked in assumptions that make your calculations suspect.  For example:

You are assuming linear travel gives linear effect.  This unlikely as the variable resistor is wrapped wire.  Some are even deliberately wired asymmetrical.

The same again for tank volume.  Determining how many gallons will result in "x" inches of increase in surface height is best done by experiment with a calibrated measuring container.

Finally, gauges are calibrated to read empty and still have some fuel remaining for good reasons.  The most obvious being, to make sure you do not run out of fuel even when you are not paying proper attention.  Also water and contaminants tend to collect in the very bottom of the tank.  The intake is often set a bit higher than you might think to avoid sucking this muck up.  No point in measuring what isn't actually available.
7
Garage / Re: Fuel Tank Sender Unit
« Last post by 4129R on Today at 01:46:39 AM »
While I am waiting for the new fuel tank sender to arrive, I am making up a dipstick from a thin length of wood.

I am going to calibrate it every 50mm from bottom to top.

The height is 21" = 530mm.

500mm = 54 litres
450mm =   49 litres
400mm =   43 litres
350mm =   38 litres
300 mm =  32.5 litres
250mm =   27 litres
200mm =   21.5 litres
150mm =   16 litres
100mm =   11 litres
50mm =    5.5 litres.

All measurements are to the nearest half litre.

57 litres equates to 15 US gallons. So 21" equates to 15 US gallons, so it is roughly 1.5" per US gallon for the two tanks.

Don't forget to put the dipstick in the tank without the fuel tank sensor, or you might damage the arm and the float. I think all sensors are located in the left hand tank only.

Well................... I have just calibrated and used my dipstick, and it shows me fuel is not passing from the left tank to the right tank through the balance pipe. I shall have to clear out that pipe when I drain the tanks to fit the new tank sender when it arrives.
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Members Cars / Re: New S1B owner
« Last post by 314159td on Today at 01:44:10 AM »
I think I found the weird engine discrepancy!

The place I was pulling data from, Dave's page here uses a 697-02 engine to compare to the Lotus tuned 697-04, not the -01 found in the standard R16L. The -02 must be the low compression version of the engine for certain export markets, as it has a 7.6:1 compression ratio rather than the 8.6:1.

Anyway, changing that on the sheet, I get a 3.66 cc delta due to the head skim, right on what Gavin was getting at. Leaving the pistons at their full crown would give 11.1:1 CR, which is very reasonable but I think it'll take them down a hair for our piddly 91 AKI.

Thanks all for poking around!
The DMV has attempted to charge me $960 in back fees on the parallel project, so the Europa is back in focus while I wait two months (or more!) for them to read their own handbook.   
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Garage / Re: Fuel Tank Sender Unit
« Last post by Dilkris on Sunday,June 02, 2024, 08:19:21 AM »
I admire your tenacity and thoroughness - the data is good to know - I for one will file it away for future reference.
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Technical Articles and DIY tools and tips / Re: Dilkris Update - Back at it!
« Last post by cazman on Sunday,June 02, 2024, 07:41:46 AM »
Thanks
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