CNG Conversion

Has anyone ever been involved in converting a Blazer to CNG(compressed natural gas)? I couldn't help but notice that there were several companies that offered CNG retro-conversion kits for Chevy Blazers. Just curious about it. Cost? Hassle? Performance..?

Biggest problem would be fuel source. I know Utah has a wholleee lot of CNG stations....but as for me in Raleigh, NC, we've got one station. 

Yeah but you can fill up at your house(assuming you have NG) so probably 90% of your fill-ups will be at $1.75 per gallon. Ching! And I think the easiest conversion is a Duplex arrangement, where you simply add-on the CNG components and you can switch from gasoline to CNG with the flick of a switch. It really seems cost-effective, too: $35K for a new Hybrid SUV or $4K for a CNG conversion? The hardest part of converting is finding room for the tank. Blazers have plenty of that and also, it solves one of their biggest problems: The Dreaded Fuel Sending Unit Failure
 
And it's supposedly better for the environment, car runs better, bla-bla-blah....but this and everything I've said is all theory and I'd like to hear it from someone with actual experience. Anyone?

i havent heard of it. how does it affect horsepower?

Here is a Dept of Energy page that shows where to find alternative fuel sources
 
http://afdcmap2.nrel.gov/locator/

Again, a duplex conversion would let you keep both fuel sources(gasoline & CNG) if case you wanted to go on long trips or weren't going to be home in time to fill up. However, I would be nervous relying upon a gas and gas pump that has sat, unused, for weeks in a pinch. Not to mention, your fuel economy would not be optimal hauling two tanks around in your vehicle.
 
I've read that you should expect a 10% drop in horsepower. Range should be the same. Engine life is supposed to be increased as NG burns much cleaner than gasoline. Suppose to be safer in an accident, in theory...

I've heard the CNG/Hydrogen is safer in a wreck theory....they cite that the hydrogen/CNG goes upwards and dissappates, whereas the gasoline falls and pools on the ground. 

I still feel like explosive decompression is much more dangerous than a gas leak, but that's just me

And is it really 4k?  What all has to be done as far as feeding the fuel to the engine?  I would guess that's most of the cost, or maybe a high pressure storage tank is more expensive than I thought. (I'm curious to see if a half/half setup could be done?)

Actually, it appears that the half/half set-up is the standard:
 
http://www.mycngkit.com/Buy_CNG_Natural_Gas_Bi-Fuel_Conversion_Kit_For_Any_Ford_CNG,_Chevy_CNG,_GM_CNG,_Nissan_CNG,_Toyota_CNG.html
 
And you were right, kit costs $950, the tank costs $2K!
 
You know, numerous people on these forums have sought some "magic modification" that will somehow boost their Blazer's mileage by 50%. Well, I think this is about as close as you're ever going to get...
 
 

This is the lpg options available in New Zealand. They have been using this since the 1980's.
Interesting reading.  Conversions on my Blazer will cost me about NZ$5,000.00
 
http://www.gasuup.co.nz/page.php?16
 
http://www.rockgas.co.nz/pdf/4wd-aug-LPG-article.pdf  - New Zealand 4wd magazine report.

Its very common her ein Turkey too, most cabs are running by CNG or LPG. But it smells :(
Conversion costs 1000$ only here, but I dont like some reason. Istill keep the gasoline.