CNG NGV Natural Gas with MeqaSquirt

[tahleel]

I am planning to convert my truck (95 Ford Ranger XLT - standard cab, shortbed, 2WD, I-4 2.3L, automatic). I plan on running the natural gas tank in the trunk. The evaporater (regulator) makes the pressure go from 3000 or 3600 psi, to around 45 psi. Then it comes to a distribution block (same found in nitrous applications). And goes to the individual injectors.

I believe the injector pulse rate and all the settings for the fuel injectors should be the same between the natural gas, and the liquid gasoline.

The only difference between the CNG and the liquid gasoline setup are the fuel injectors. Does anyone know how to size them up? I see some cheap 1600cc/min (150lb/min) injectors on eBay for $60 a piece.

How do you guys think it would come out? You think I can pull this off easily, as I've heard how easy other MS setups are accomplished?

-Tahleel

[Grant MacDonald]

I am also interested in using gaseous injection (but with LPG). I understand that the system is much less complicated then injecting LPG in it's compressed state, but I'm still finding it hard to get individual components (as opposed to a full system because I can use MS to control it). As far as I understand if you are injecting it as a gas it doesn't need any additional coding because the density doesn't change unlike LPG. I know there was a big thread on it, but that was for injecting LPG and didn't really cover gaseous injection. I guess this doesn't really help the original poster, but I'm definately on the hunt for info myself.
Grant

[tony2ltr]

Well, I'll put my third cent in. I am about to try CNG injection on my VW diesel, and may try it on my Cosworth Vega. I am trying to understand how their flows are rated.
Tony

[tony2ltr]

I think part of the problem, is that once lpg is compressed to as little as 50 psi, it remains a liquid at ambient temperature. What I have found, is that the proper way is to inject it as a liquid, above 50 psi, this way, it is similar to gasoline, but without needing the additional enrichments(TPS based Asynchronous for acceleration) This way though, you actually need a fuel pump, or air pump to pressurize the system.