shadetree30 Reader
Jan. 9, 2013 4:19 p.m.

Has anybody done or contemplated doing a CNG conversion?

My thoughts would be on a DD or car hauler...

GameboyRMH PowerDork
Jan. 9, 2013 4:25 p.m.

I've thought about it, common in the rock crawling world, you can run dual-fuel by simply putting the CNG carb in the intake ahead of the gasoline carb/efi system and cutting the gasoline.

Knurled UltraDork
Jan. 9, 2013 7:12 p.m.

We're doing them now. The installation isn't cheap but the people who've done it find that the conversion pays for itself in a year or so. Assuming you spend $20k a year on gasoline, anyway. Given the size of the tank required for any kind of meaninglul range, I'd only do it to a pickup. Figure a tank that is 20 gallons-equivalent will take up the width of the bed, and the diameter will be almost the height of the bed. Steel or spun-carbon tanks are available, with the expected tradeoffs of weight vs. expense.

A gallon-equivalent of CNG is about $.80-2.00 depending on if you buy it from a filling station or have a home fill station.

The new systems are neat. They interface with the PCM in such a way that the computer doesn't know that it's firing the wrong injectors. It's kind of like a piggyback but in reverse.

You'll need to log in to post.

Also on Grassroots Motorsports

Meeting Our New Daily Driver

1 day ago in Project Cars

We settle into an aircraft carrier-sized Mercedes.

2015 Ford Focus ST

1 day ago in New Car Reviews

The Focus ST has a lot of our world excited. After all, there are few better options available now for ...

The Grassroots Motorsports Factory Five 818 is up For Sale

2 days ago in Project Cars

We're offering our turbo-powered kit car via auction.

2016 MX-5 Cup Race Car Pricing Announced

2 days ago in News

The next generation of MX-5 Cup continues the tradition of affordable pro racing.

Focus on Sebring

2 days ago in Project Cars

Our SVT Focus visits a Hooked on Driving track day.

Weekend Adventures: Petit Le Mans

2 days ago in News

We're on our way to Road Atlanta to enjoy some IMSA racing.

Another Round of Rallycross

3 days ago in Project Cars

We visit a Central Florida Region SCCA Rallycross with our SVT Focus.


Grassroots Motorsports Magazine

Subscribe Today

Also get your instant access to the digital edition of Grassroots Motorsports Magazine!

Learn More