gas to diesel
#1
Senior Member
RACING JUNKIE
Thread Starter
Join Date: Jul 2007
Location: Independence, Missouri
Posts: 1,181
gas to diesel
Has anyone ever converted a gas truck to diesel? I have heard some nightmare stories, but do not know if I believe them. I have done a couple of diesel to gas and had no problem with the swap, one in a olds car, and one in a chevy van, and dont remember having that many problems.
#2
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JUNIOR BUILDER
Join Date: Dec 2006
Location: sarasota,florida
Posts: 73
#4
Senior Member
EXPERT BUILDER
Join Date: Dec 2002
Location: spring creek nv.
Posts: 329
i put a cummins out of a bus in my 4-door duelly truck.have a 4-speed manual trans with a gear-vender over/under aux box and 3;55 gears.towing my trailer with 2700 lb. car on it i get 25mpg running 80mph on cruise..wouldn't go any other way for towing..converting from a 454bbc[gas]to the cummins was a cake walk.
#5
Member
JUNIOR BUILDER
Join Date: Sep 2005
Location: East Texas
Posts: 86
Originally Posted by hotrodharley
i put a cummins out of a bus in my 4-door duelly truck.have a 4-speed manual trans with a gear-vender over/under aux box and 3;55 gears.towing my trailer with 2700 lb. car on it i get 25mpg running 80mph on cruise..wouldn't go any other way for towing..converting from a 454bbc[gas]to the cummins was a cake walk.
#6
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MASTER BUILDER
Join Date: Nov 2007
Location: Wisconsin cheesehead!!
Posts: 213
back when diesel was cheaper then gas at the pump, there was a couple people that put in 4.3l diesel engines in Fieros and as far as I know they are still driving them without any problems. one of the more unique fiero swaps out there. 8) they got great gas mileage also with them
#7
Senior Member
EXPERT BUILDER
Join Date: Dec 2002
Location: spring creek nv.
Posts: 329
Wow, that's better milage than newer diesels are getting running empty! What are you getting without towing?
yes i know.lot doesn't believe me until they use my truck or go somewhere with me..it gets about the same not towing..maybe 1 mpg more is about the only differance..it doesn't work hard at all..the engine was so tall that it had to be install under hood at a angle[tilted to one side]so the turbo didn't hit hood..the tailgaters hates me..if they it up on my tailgate i just hammer it and smoke them out.they back off after that.
yes i know.lot doesn't believe me until they use my truck or go somewhere with me..it gets about the same not towing..maybe 1 mpg more is about the only differance..it doesn't work hard at all..the engine was so tall that it had to be install under hood at a angle[tilted to one side]so the turbo didn't hit hood..the tailgaters hates me..if they it up on my tailgate i just hammer it and smoke them out.they back off after that.
#9
Senior Member
RACING JUNKIE
Join Date: Mar 2003
Location: Fountain,MICHIGAN
Posts: 856
Gas to COAL
Hey Hot-Rod?
I have a 99 GMC 3500 4-dr Dually 4WD.How Much to do the Conversion?Cause my Gasser has Power up the ASS,but it LOVES Them Gas Pumps!Pulling My 45' Trailer it gets between 7.5 and 9MPG.Empty i have seen 14MPG but that was after the Computer Upgrade!
To go to 25MPG it would NO Take long to Pay for the Conversion in Fuel alone????????
Later
G 8)
I have a 99 GMC 3500 4-dr Dually 4WD.How Much to do the Conversion?Cause my Gasser has Power up the ASS,but it LOVES Them Gas Pumps!Pulling My 45' Trailer it gets between 7.5 and 9MPG.Empty i have seen 14MPG but that was after the Computer Upgrade!
To go to 25MPG it would NO Take long to Pay for the Conversion in Fuel alone????????
Later
G 8)
#10
Senior Member
EXPERT BUILDER
Join Date: Dec 2002
Location: spring creek nv.
Posts: 329
the engine converson in 1988 cost $6000.00[engine included]then in 98 did the us gear vender over-under aux trans and change rear gears to 3;50's..i'm thinking i was into that about $2000.00;;;i'm thinking it can be cheaper now..with the dodge trucks having cummins in them a person can go to junk yard and pick up the engine from a wreaked dodge truck..also most all dodge trucks with the cummins has the 3;50 rear gears.look for the older ones because they don't have the computter control fuel systems.then buy the us gear vender aux trans..they are still on the market;;i heard the new news are quicker and easy on drive trains.mine is one of there first ones so when going up or down on shifts it crunks hard...sometimes i can catch everything just right[rpm]and it doesn't do it harderly.