O.K., O.K. you tech guys dont beat me up to bad. My question is how would an LS 2 engine run on Compressed Natural Gas CNG and would it damage the engine? Have at it.

 

i used to be a tech/trainer on CNG conversions back in the late 1990's. we converted a wide variety of cars to it. most ran good, but got less mileage and performance on it. reason why was the compression was not high enough to take advantage of CNG having more octane. i would not do it to an LS2 unless you are going to raise the compression and have a source of CNG quick fill. very expensive proposition to do also. just some thoughts...........cranky

 

High compression? I thought the LS engines had high compression. I know of a local shop that converts new cars over to CNG with no problem, not trying to start a fight i just thought the increased octane would increase performance.

 

Sorry to disagree here. Personally I have owned and driven taxis for over 25 years. Since 1986 all our cars were running on cng. I loved it so much that I converted my 1986 civic to cng, for only $1,700. It lasted till 2010 till my wife had it totalled it in an accident. All our cabs were GM products, mostly Chevies. In the first six months after converting the whole fleet of about 160 cars saved $600,000 in fuel savings over gasoline. Now I have a newer Honda and a C5 corvette.As for compression any car especially a v8 or even a four cyl like my old Honda does not need more than 9 to 1 compression. The pwer difference is not that noticeaable. By the way the savings in gas for the Honda paid for the price of the cost of the car plus the cng systemr, and also cng burns at least 40% cleaner than any gasoline car. Also used synyhetic oil and after 5,000 miles the oil was still crystal clean. No carbon deposits as in gasoline. There are far more advantages than this. But I don't want to keep on making this thread too long. We have a new gov't here in B.C. Canada now and they have shifted away from promoting cng so interest has been lost and cng fill up stations are now scarcer.
Al...

If a car with 12 to 1 compression were converted to cng it would leave any similiar car sitting in its dust.12 to 1 wou;d be the most ideal for cng but not necessary.

 

Were do you put the tank in a Vette.

I beleive that CNG is the future.

 

Never converted the vete at all. Have only had it for eight months now. Here the price of cng is still two thirds the price of gasoline.We usrd to have gov't grants for converting to cng. They are now gone for now.Even the newer Honda I have also is on gasoline.

 

Just be aware that the stock valves and seats will not hold up.
I have redone several ls heads that were so posed to factory CNG (truck application)
The cost of reworking the heads and conversion would buy a lot of gasoline.

 

I totally agree with you about valves and seats will not hold up without the gasoline moisture etc. My Honda went 450,000 kms before it was totalled in an accident, But what most people forget and not told after a cng conversion is to occasionally use some gasoline for driving . For instance if I drove 250kms on cng and then filled it up I would drive 25kms on gasoline and then switch back to cng. Never had a vave proplem ever. A lot of our cabs did the same procedure. Also as to mileage, I got the same liter equivalent mileage on cng as on gasoline.Used to do a 200km run on cng for $9.00 about ten years ago. And the price of cng has not changed since then.