Solenoid valve (does this exist)?
 

I've installed a lpg system on my car and I'm in the process of tunning it. One valve though would help a great deal.

I need a valve, to control the lpg flow, that is activated from pressure (from the boost of the turbo). As boost increases so does the flow of lpg. Does such valve exist? If yes, do you know where I can find one?

Thanks a lot!

Deni

Such a valve does exist, though it would be an off/on operation. In other words the valve could be actuated by boost pressure, but it wouldn't vary depending on the boost pressure.

You can find that kind of thing on mcmaster.com

Why do you need varying amounts of lpg?

I already have a pressure switch that controls a solenoid valve when a certain amount of boost is reached.

With the increasing of engine load and boost I can inject more lpg into the engine. If I inject too much lpg too early the car will start to ping/knock.

For now I've set the lpg to be injected at about 12 psi. If I set it at a lower boost then the engine will start pinging. So if I start injecting adjustable amounts of lpg over the rev range I can have increased torque on a broader rev range rather than at a set boost.

You can compare it to a normal turbo and a variable vane turbo. With a normal turbo you have no power and then suddenly you get loads of power as boost increases. With a VNT you have boost, and power almost from the start of the rev range.

I've searched a bit and I found that on lpg converted carburetor gassers the vaporizer/reducer uses vacuum to control lpg flow. Is there any way I can make work on my car? I.e. can I duplicate the vacuum of a gasser with my engine?

Link of the vaporizer/reducer

How about you get one of the propane systems currently sold for the Dodge/Chevy/Ford trucks?

For $600+ they're a serious rip off. A lpg vaporizer/reducer costs about $100 or less.