RobAnzac

" You need graph paper and a pencil or plotting software to get a graphic " Yep, it is what I do " Now look at the 16 curve options on that list and go 'Which curve ? " You are right, especially for LPG, I doubt you will ever get what you want out of that lot, without a compromise that will irk you for the rest of your days

I have just found this on the Australian vendor website https://www.123ignition.com.au/product/123rover-8-r-v/ So a "switch" version for the Rover V8 has existed with 16 pre-installed curves (0 to F) There is a link on the page to the Installation Manual (PDF) https://www.123ignition.com.au/wp-content/uploads/2017/09/rover-8-r-v.pdf Advance at 400-1000rpm, 2400, 4800 (total) is given for each curve + info on vacuum advance Following that is a table of Rover vehicles with a recommended 123 curve. The LR90/110 is curve "F"

I hadn't picked up that the Tune+ (bluetooth) only allows one curve, good to know, I would choose the Tune (USB) version every time as you never know when being able to switch to a second curve might come in handy. e.g keep a good baseline as reference, while you endlessly fiddle with a tuning curve. I downloaded the Tune (USB) software available from the website(s) and it installed and worked fine on Win 7 (though obviously I can't confirm if it would "talk" to a distributor as I haven't got one ... yet) It seems pretty straightforward. I wish I had something like this when I was mucking about with LPG on Holden V8's in the 90's. The biggest single improvement you can make to an LPG installation is timing. (usually more initial and less total) With this setup you could probably programme it to take initial timing out while cranking which would make life easier on startermotors and help with hot starts

Actually might have an answer to my own question Firstly the English version of the NL online shop is here https://www.123ignitionshop.com/gb/ (a different site to the main 123 site) And on that site there is this page https://www.123ignitionshop.com/gb/content/11-123tune-curves-download-page Looks like you need to install the software on a computer to look at them

Thanks for this Raggylad This has made me consider one for my 90 V8. I have a 123 (switch version) in an Austin 1300 and it works very well. It came with 16 pre-installed curves, and a good table in the manual correlating switch number to original Lucas curve numbers . The pdf manuals are available to download on the spec page for each distributor. There was an exact match to my original points distributor, and switching between curves involved removing a plug in the side of the distributor and rotating a micro switch with a small screwdriver. No computers or phones involved, but it can't do what you are doing, i.e switching between curves on the fly when you change fuels. They don't appear to have a "switch" version for the Rover V8, only the "tune" (computer and usb lead ) and "tune+" (phone app and bluetooth ) but from what you say above, they do have curves in their library that include Landrover versions of the V8. Is that library accessible before purchase ? - I had a hunt around the website but couldn't find anything

This might be where that leads to https://www.the-intercooler.com/library/blog/the-future-of-jaguar-and-land-rover/ It is a blog post by Dan Prosser at the Intercooler that should be accessible without a login

Hello Toby, A few years down the track since you posted above, so bit of a long shot. You wouldn't have any photos of your extra 50L tank set-up in the back of your 90 by any chance. - I would like to see them

Pete, How did you get on with this ? I too am thinking of doing exactly that with a bog standard V8 90 with the standard exhaust.

Thanks for this deep, I have been thinking about doing exactly this, i.e replacing a v-belt carb 3.5 with a serpentine Discovery 3.9, while retaining the carby and v-belt front end. Good to know that it can be done. It means no Low Volume Vehicle Certificate nonsense will have to be contemplated, which I think may be required in NZ when the fuel system is changed from carb to injection. The capacity increase probably falls beneath the LVVC threshold anyway, and who is going to know when it all looks the same? So WoF's won't be a problem