Christmas! Everything survived the journey except the aerosol of leak detector. Don't pack aerosols inside 30 kg boxes full of hard things kids! All present except the "nozzles" in the base kit. (they supplied 6, not
Luckily I ordered 8 anyway, not knowing that they came with the base kit.
That'll be a complete
front-end kit then.
I'll kit up the leftovers/add to them and sell on as Jaguar-specific kits once I know that it works/how much of each piece is needed.
Mounting the vapourisers/reducers. I can either remote mount the filters, or mount them directly to the vapouriser and use them as a tight 90 degree bend. This is where I propose mounting them:
I can move the two relays in the image below to drop the front one forward and down:
I'm mounting them with the diaphragm along the plane of the vehicle. Bumps/accel/decel shouldn't influence it, but lateral g force might upset regulation. Beyond this, are there any restrictions on positioning? I think I'd like to run them with either the hoses up top, or one vapour hose pointing down:
Injectors are a pain in the backside - just too big to drop where you want them. The side-exit OMVL superlights or magicjet jobbies have an advantage here. Air intake trunking on the RHS, and the oil filler cap on the LHS, cause added fun. About the best I can do is mount them like this //\\ against the side of the chargecoolers/plenum, with equal length hoses to the nozzles on the intake runners (thanks for the 5 mm hose tip Simon@LPGC - genius). There'd then be unequal length runners from the injector inputs to the distribution rails, which I'd pass over the top of the air intake trunking and mount to the false bulkhead. Sacrifice pretty for short/even outlet pipes. The setup would look a little like this:
Yellow - electronic gadgets/wires. The two boxes shown are the ECU/Emulators and the MAP sensor.
Red - vapour hoses (12 mm) and filters (2 off)
Light blue - distribution rail and 6 mm hoses to the injectors
Pink - injectors go here
Orange - capourisers
Darker blue - filters (if remote mounted) and copper pipingQuestion: Single hose diameters
Is this going to work with "only" a single 12 mm diameter feed to each injector rail and the vapourisers commoned between themselves?
12 mm hose is 113 mm^2 (or 78 mm^2 if you count 10 mm dia restrictions at barbs) and 6 mm hose is 28 mm^2 (or 12.5 mm^2 if you count 4 mm dia restrictions at the injector barbs) Hose in >4x hose out, so should be ok?
I've mounted the MAP downstream of the filters, and tried to arrange the supplies to be of similar length. I'd prefer the "pressure balance" pipe to be after the filters - I can do this and retain the same layout by adding a "tee" to each line and crossover pipe, but it would add yet another restriction as the tees are smaller diameter. What kind of pressure drop is there across filters?
I could fit the MAP and temperature sensor to the crossover pipe to avoid the restriction of the MAP in one pipe only, but I'd be concerned about a no-flow condition. I could also fit it to the end of one injector rail.
There'll definitely be biased flow here. One vap supplies each bank, and the balance pipe is just that. Temperatures could vary across the vapourisers, which wouldn't be picked up by the MAP and the OEM ECU's fuel trims would have no chance.
I could also do things this way:
Using two M12x1 mm threaded 12 mm pipe barbs screwed into the end of the injector rail. The pipe runs end up different lengths, but you've got lots of area and there's always at least one full-diameter pipe (without the MAP in it) feeding the injector rail.
I'm leaning towards this plumbing. Better? Necessary? Am I shooting myself in the foot with regards response time? (more pipe = more volume = harder for the vapouriser to respond to rapid changes in MAP)http://autogas-lpg.co.uk/-reducer-parts ... 10-48.html
^That's where you buy the extra MagicJet outputs by the way. (to get from "250 bhp" to "350 bhp" of gas on one MagicJet reducer.
It is also (just) possible to do this if I fit an intake from a naturally aspirated car (same, except for a noise-cancelling resonator tube):
More symmetrical, but the volume is near identical, it'd be a tighter fit, there'd be even more water hose, and more of the LPG pipework would be on show.