Converting 1985 gmc sierra

[jaytheguy]

Hello, I'm looking to covert my 1985 gmc sierra to be a cng vehicle. I'm having a hard time finding info just lurking around, from what I understand i don't need to get a epa or carb certified system since it was manufactured before 1994 do I? Also can someone point me in the right direction as far as conversion kits go? I'm looking to make it a duel fuel vehicle. If I'm not mistaken it should be a little easier to do seeing as its carbed instead of having efi? thanks in advance for the help I'm sure to get. also any information you have will be helpful

[afvman]

Re: Converting 1985 gmc sierra

Jay,

I feel your pain. Finding components for older cars/trucks isn't easy. There is a U.S. mfg., IMPCO, that is still the worlds largest alt. fuel equipment supplier. You can see their website: http://www.impco.ws/products/carburetion.htm

Finding a local distributor that'll work with you is the best bet for your vintage vehicle.

I converted my 1985 Ford Econoline at 71K and proceeded to put over 250k on CNG. So, it's worth it.

We'll help any way we can.

Good luck,

afvman/Bill

[jetboatjohnny]

Re: Converting 1985 gmc sierra

I see Impco sells engines. Could I purchase their 4.3 engine (Now approved by CARB Executive Order) and install it in a '91 Chevy Astrovan?
I guess I should be asking them!

[younkin]

Re: Converting 1985 gmc sierra

I noticed that Impco has no CNG Kits for cars or trucks? Is this true? Jim

[afvman]

Re: Converting 1985 gmc sierra

re. IMPCO kits,

That's correct, they only sell components...and they're not that easy to obtain. But, We're CNG enthusiasts, what's new?

afvman/Bill

[John Mitton]

Re: Converting 1985 gmc sierra

I know we are straying off-topic a bit, but IMPCO has recently certified some bi-fuel 6 liter GM retrofits.

http://www.ngvamerica.org/pdfs/marketplace/MP.Analyses.NGVs-a.pdf

In Utah they are installed by SemiService, and in Oklahoma by Tulsa Gas Technologes. Not sure who installs them elsewhere.

[jaytheguy]

Re: Converting 1985 gmc sierra

Jay,

I feel your pain. Finding components for older cars/trucks isn't easy. There is a U.S. mfg., IMPCO, that is still the worlds largest alt. fuel equipment supplier. You can see their website: http://www.impco.ws/products/carburetion.htm

Finding a local distributor that'll work with you is the best bet for your vintage vehicle.

I converted my 1985 Ford Econoline at 71K and proceeded to put over 250k on CNG. So, it's worth it.

We'll help any way we can.

Good luck,

afvman/Bill

Thanks for your help Bill, I'm not sure as to what all I need to convert it.

I know we are straying off-topic a bit, but IMPCO has recently certified some bi-fuel 6 liter GM retrofits.

http://www.ngvamerica.org/pdfs/marketplace/MP.Analyses.NGVs-a.pdf

In Utah they are installed by SemiService, and in Oklahoma by Tulsa Gas Technologes. Not sure who installs them elsewhere.

John, thanks for those links the only thing I'm unsure of is all those model years the youngest is 2005 which I would imagine would be efi.

Thanks for the help everybody!

[cnghal]

Re: Converting 1985 gmc sierra

Jay,
I'm working on a kit for GEN 1 Bowtie 350s and for my 89 TBI 350. I'll be keeping everyone informed as to my progress. Keep your chin up.

[StormRider]

Re: Converting 1985 gmc sierra

I've also been lurking around trying to find information/details on fitting a CNG kit on a pre-1994 chevy/jeep truck, and not having much luck. Anyone have links to DIYish info? websites/books/ect? A $10K-$18K conversion just doesn't make financial sense to me, and I commute 70 miles a day