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Location:
Netherlands
Registered:
February 2003
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What LPG equipment to get?
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Wed, 16 April 2003 15:02
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Hi,
First of all I'm NOT looking to start another debate - I've made my choice. Around here, LPG is 1/3rd the price of petrol, since it's not nearly as heavily taxed. I do pay extra registration costs, but I'll easily win that back cos it's for a daily driver.
Anyway, I currently have a VERY crude LPG system in my car and I'm looking to turbo it on LPG, so I want to upgrade. Flywheel power is roughly 90kw (120hp) NA, the goal is boosting that to 200hp (will drop compression a bit to get there, if necessary). I might also upgrade to a different head (110kw / 150hp NA) and then turbo that, for 200-250hp. The fuelsystem I choose now must support both options although of course it would have to be adjusted/retuned.
I just bought an extra intake manifold to play with, so the car won't be offline while I experiment with fitting LPG equipment.
Right now I'm looking at two options :
- Gas Research carb (will replace the throttle body). Looks very good on paper, but since they're still a venturi style gas carb, I'm worried about power and economy. How much loss can I expect, compared to multipoint EFI? Also, how much would I pay for just a carb with the right converter? I will install it myself and already have the rest (tank, lines, valves). GRA suggested their 320cfm TB and quoted AU$875 for the kit, new. Anyone who knows of a better price or a used kit up for sale please let me know!
- Multipoint gas injection systems. Vapor injection seems to be affordable. I've found gas injectors as low as 75 AU$ each. It's just that I was quoted over 500 AU$ for the converter from a local installer! Surely that can be had cheaper? It's just a "dumb" manifold-referenced constant pressure converter... (1 bar above manifold at all times).
Downside to the multipoint stuff is that you need an ECU to go with that. I'm considering adapting a MegaSquirt.
Any ideas? I hear mrshin is working on something... making me REALLY curious... please tell me more... PM me if you don't want to make it public yet, as I'm looking to make a choice real soon!
I'm willing to spend the cash on the right system, but if a different system or a used system will work just as well, I'd rather keep a lot of cash in my pocket for other upgrades!
Marcel
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