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get the sparkplugs one step hotter, it's the best you can do,i'm pretty sure it's a lot of hard work.
 

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very funny mdoggytib, you should become a comedian.
no, lpg stands for liquid petroleum gas(like propane, buthane) but compressed to a liquid. i've got a ring-tank in the back filled with lpg, where my spare tire used to be. So like i said when the car has a certain temp. it switches to lpg, the regular fuel is cutoff. (lpg costs 0.38euro/liter = +- 0.43 $/liter) everything is controlled with an extra ecu specially for the lpg-system. it just takes the real parameters from the cars ecu, and based on that it can inject the right amount of lpg with the right timing.

Get the sparks one step hotter? How isd that gonna help and how do i do that? with a hairdryer? i've got denso iridiums with magnecor race wires.
dahak you could be a comic too. one step hotter means for example if stock ngk have 5 index, then you should have 4, but all other sparkplugs are indexed opposite, yoг would need a 6 index.
 

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Malogus, two of three of my cars run on lpg, so i know a "bit" better, you Americans don't even know what's expensive fuel and for what is lpg used, we have about 10% cars running on it. converting the diesel to propane is impossible.

dahak, if you have lpg-specific plugs, that's good. but lpg burns colder than low-octane fuel. it burns faster and doesn't heat the cylinder walls so much , so the hotter plugs would be , for example ngk stock are recommended bpr5..... , colder will be bpr 6.... , hotter bpr4...just fyi

and here's the ngk to denso cross-reference

converting in my country costs from $400 for reductor system to $1500 with the injectors controller...
 

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ho ho ho to run on lpg no engine conversion is needed, all remains the same only extra injectors( in the fuelrail i think). It isn't so expensive as 4k$ mine cost 2k$ but i do 100km/day so i've earned it all back. But take this in considderation: lpg-systems take back performance(it's a little bit noticeable). This is why i was searching for benefits or ways to improve performance taking the high octane rating of lpg.
Raven here in Belgium there are kits for lpg in diesel engines. But it's not so popular because dieselfuel is cheaper and the engine is more economical.
So the sparkplugs become hotter when running on lpg, so i'll need the....cold type?? What are the benefits?longer enginelife or better performance?
Thanks all of you
dahak, no, the engine runs colder + losing some power because of lpg , you could get one step hotter sparkplugs, it should get you closer to optimal exhaust temperatures, i may be wrong, but i think the easiest way is to get the msd ignition amplifier , but i wouldn't mess with it just to try to retard (or advance) the timing:3_headsha
i'd say economy is economy , want to get power, switch the lpg off (in both lpg cars we have a switch fuel/lpg and the emergency propane start button), lpg is not just like the racing fuel, you know, it has it's properties, that won't let you get the power like from toluene (114 oct.rating), so i wouldn't worry much.
 
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