NEK5
3/4 ton status
I'm about 60% convinced so far...
CK5
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Propane powered DD *Spark Plug, and mounting questions*
- Thread starter NEK5
- Start date
dfl701
1/2 ton status
Why 60?
my truck has a 358, between 475-500 hp, its also 12:5 to 1 and i can only use race gas 105 and above. race gas is 8.00 a gallon here and it gets around 8 mpg now. it sounds like it would benefit me to change to propane, where is the best place to buy the kit and do they have it for the cfm flow i need. i have a stepside bed and an 8 inch lift so the bed is just for a spare tire now, fork truck tanks would fit right in...
They have the cfm needed it will be more money but think of it as dual quads 
NEK5
3/4 ton status
Still researching it, etc.
dfl701
1/2 ton status
Yea I still wanna find a cost for the kit and a place to mount the tank then I'll be sold I think
NEK5
3/4 ton status
These are my state laws, and I guess that means I'm good to go with that.
http://www.afdc.energy.gov/afdc/progs/ind_state_laws.php/MA/LPG
http://www.afdc.energy.gov/afdc/progs/ind_state_laws.php/MA/LPG
Mine just became my DD again the fuel pump in the van took a dump.
dfl701
1/2 ton status
Is there a gauge you can hook up to see how much propane you have left?
My tank has a guage on it just have to look out the back window
dfl701
1/2 ton status
Oh ok. How long is a tank lasting you now that you drive it daily
RaysJimmy
1/2 ton status
Mine has a gauge on the tank and one in the cab.
dfl701
1/2 ton status
What kind of gauge are you using?
RaysJimmy
1/2 ton status
Gauge
NEK5
3/4 ton status
do you DD your truck?
NEK5
3/4 ton status
In the hopes of not sounding like a complete moron, what is the thing in place of the A/C? Is there something in the system that needs to be belt driven? Please excuse my serious lack of research.
a few things to think about.
1. The cfm is less (impco 425 flows 450 cfm at 1.5hg). I really don't see this as a huge problem since most of you are running low speed truck engines. Some guys run 2 but the specialists I have talked to say most have low speed fuel problems because one diaphram will try and open before the other.
2. They are super easy to blow through turbo. I am going to twin turbo the stock 454 in my k30 for some diesel like towing power.
3. Propane stuff is usually cheap if you can find a old truck with it on it. Very common swap in the 70-80s here. I put together a new kit out of new old stock at the local propane dist for $250. I know guys that have bought a whole truck for $100 or less and used the system off the truck.
4. You can put it on new trucks. I have put it on a 07,05 c1500s and 06 c6500. Lots of electrical work and high cost but if you sell propane you use your product.
1. The cfm is less (impco 425 flows 450 cfm at 1.5hg). I really don't see this as a huge problem since most of you are running low speed truck engines. Some guys run 2 but the specialists I have talked to say most have low speed fuel problems because one diaphram will try and open before the other.
2. They are super easy to blow through turbo. I am going to twin turbo the stock 454 in my k30 for some diesel like towing power.
3. Propane stuff is usually cheap if you can find a old truck with it on it. Very common swap in the 70-80s here. I put together a new kit out of new old stock at the local propane dist for $250. I know guys that have bought a whole truck for $100 or less and used the system off the truck.
4. You can put it on new trucks. I have put it on a 07,05 c1500s and 06 c6500. Lots of electrical work and high cost but if you sell propane you use your product.
NEK5
3/4 ton status
What is 1.5hg?
I think the 450cfm 'may' starve the motor a little, but I don't know enough about induction, etc, to be sure.
I think the 450cfm 'may' starve the motor a little, but I don't know enough about induction, etc, to be sure.
1.5hg is inches of mercury the standard depression for measuring 4 barrel carbs. May starve the engine but a 350 only needs 500 cfm at 5000rpm with 100% volumetric effcency, most of you don't have better than 85% which would require 430 cfm. I am willing to bet most of you wouldn't notice the hp loss up top but would notice the engine will now run upside down. Everything is a trade off.
There are kits that gain horsepower because instead of turning the fuel to a vapor first it is injected as a liquid and vaporizes in the intake. It is a super complicated system but runs awsome. All swan food trucks have this system.
There are kits that gain horsepower because instead of turning the fuel to a vapor first it is injected as a liquid and vaporizes in the intake. It is a super complicated system but runs awsome. All swan food trucks have this system.
dfl701
1/2 ton status
So basically it's worth it for 250$???
