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6.0l Vs 5.7 Vortec Vs 5.7 Tbi, Propane Conversion?

oakman

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oakman Enthusiast

oakman

Posted
Posted

What type of milage does the 6.0l get HWY /CITY

5.7l vortec HWY /CITY

5.7l TBI HWY/CITY

 

This is why I'm interested. I am looking into a propane injected engine;and would like to convert the most fuel effiecient of the 3 engines found in a 3/4 ton truck. I think it would be the 5.7l vortec over the 5.7 Tbi but how much more fuel efficient would this engine be ? Converting to duel fuel the cost is $3000 for 5.7 TBI and $5300 for 5.7 or 6.0l vortec (sequential fuel injection). I think the old TBI milage won't be to far off the 5.7 vortec and the conversion cost is quite less. Any ideas !

jpringle3 Enthusiast

jpringle3

Posted
Posted

If the propane kit you are getting, is it just changing the fuel system, then I would say you are waisting your time and money. If you are going to do it do it right or leave it alone. GM made propane powered engines and I am sure they still do. If I was you I would get a hold of a GM performance book and see if they can give you the changes to do. I made a few in years past for people, It involved different pistons to up the compression ratio to 14 to 1, a different cam, and head work to put in valve seats and stellite exhaust valves. PLAY SAFE!

svensk Senior Enthusiast

svensk

Posted
Posted
I read that the 8.1L can be run on gas/natural gas or propane the internals are made for it,, anybody else hear about that?

That's what schwan's does. They bought the company that did the conversions. I used to be a schwan's guy and we had a fleet of topkicks with LPEFI 8.1L engines.

They had a ton of power.

perform95 Enthusiast

perform95

Posted
Posted
the company that i work for the route truck were all propane 1983 to 19?? old can only get about 90miles out of them ......

Huh? :D

 

 

 

 

we have big trucks1988 c70s that are side loaders that we deliver in all run on propane ..90 miles on them

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