D-gas bj74

[Josh_91]

hi
i have recently read above D-gas LPG/Diesel conversions and was wonder if anyone has fitted the system to there BJ 74... i have done a lot of research on the internet and only found reviews that people rave about it, no one got anything bad to say about it. is there any trade offs???
D-Gas Diesel-LPG Enhancement Systems
thanks
Josh

 

[roscoFJ73]

Its been round for years in the trucking game but has only recently have the 4wd crowd caught on.
When the truckies in their kenworth or mack roadtrains came to a hill they would turn on the gas from a bottle under the seat for some more power,and once over the hill would turn it off.

These days everyone wants to run the gas full time. The jury is still out on whether it does any damage long term.
But when you up the HP of any engine, it almost always brings down the longevity. Its inescapable.

Those that are saying its great have probably had it connected for a year or 2 which is too shorter time to make an accurate assessment.

 

[crushers]

not enough info on their site to explain how it works. it seems the propane in injected at the manifold instead of preturbo so the propane has to fight the charge pressure from the turbo. if the turbo is producing 14 lbs then how does the kit know how much pressure to dump the propane in at? how does it determine the flow rate? how does the kit open and close?
too many unanswered questions.

i recommend this kit ( look up 'powershot 2000' )since i know it works, that it does work and that it is built properly to minimize the risk of over injecting.

 

[Turbotojo]

My old man has his Mack Ch 454 booked in for a fit out. @$13000AUD it's not cheap. But the saving is supposed to be around 10-15% in fuel costs and up to 20% power increase. I'm pretty sure that the E7 motor can take the extra power.
I'm getting a Steinbauer tuning module to try and save more fuel. The power is supposed to go up to 550hp in my truck and up to 2500nm of torque to save fuel. Then I will compare both to see which is better.

I think after turbo gas injection is better and safer than pre turbo. It shouldn't have problems with high manifold pressure as it is injected at an even higher pressure. It's all electronically controlled with lots of sensors and safety features. To my knowledge.

 

[crushers]

i have yet to see a propane injection system that returns much, if any, fuel... usually any fuel savings can be attrributed to different driving style

i recommend the system only if you want more power...

 

[Turbotojo]

We are getting a written guarantee that it will cut costs or our money back on the total cost.

I think the idea is the same as with unit pump or common rail injection where you can get 2 or multiple injections per stroke to increase power and decrease consumption with a better cleaner burn. So the gas starts to burn first which ignites the diesel quicker and gives a fuller burn with less wastage of the fuel. Therefore it can even better the motor's emission standard to a higher level.

 

[crushers]

yep, the same claim with many PI systems.

"propane will cause the fuel to burn more completely thus improving the fuel milage" = BS.
"propane will improve the burn process thus reducing the amount of emmision coming out the tail pipe" = BS
"propane mixed with diesel will increase the power of each stroke" = truth

this is the ONLY reason to run propane injection system on a diesel engine.

i have done years of studying the different PI systems offered, they all make the same claim, none have been able to prove the milage increase BUT some replies from actual people running the systems have reported a 1-3% increase in fuel milage. but when you calculate the cost of propane fill and the cost of the system itself the savings are irrelavant. i have studied many of the different application systems and the only one i was impressed with as being completely safe was the one i stated above

(BTW, i stopped selling these systems about 2 years ago due to time restraints. there are still the odd numbskull that feels i promote these systems due to financial gain to me which is not the case.
i still admire the system and "might" start selling them again but no time soon.)


this being said, i hope you can proive me wrong although i will bet when the fuel milage increase does not appear the excusses will.

 

[Josh_91]

4wd action gold label edition recently did an article on the diesel/LPG conversions
the LPG runs from the tank thought the convert , which steps the gas down a usable pressure . it then goes through a control valve which measure the precise quality of gas required for combustion, the amount is measures by a computer module monitor, engine speed, manifold pressure, throttle position and the brakes, the computer is fully tuneable to what u want most fuel economy, power or both.
you can switch in on and off inside the cab with no effect on the motor . the engine is not modified at all so if u think some thing is wrong simply turn if off
if your foot leaves the accelerate the gas is shut off, your engine will start purely on diesel and this from 800 rpm a control amount of gas will be injected

here is a bit info what do u think of the system now ??


Technical info about gas injection systems

Josh

 

[crushers]

well,
if you want me to make a few points then here goes...now remember this is just a critics view, it is your money and time so to me it makes no difference.

first, it has been proven in the past that NA diesels do not respond well to propane injection. period. so, for me, if you are running a NA 3B, 1HZ, 1PZ then walk away.

next i see it says " at idle there is a small amount of propane bing injected" and then it says "every time your foot comes off gas flow is stopped instantly and completely. " so which is it? when you take your foot of the throttle the engine will return to idle.


the power increase i can agree with


you would need a large amount of propane to "keep the oil clean from soot" so i disagree with that paragraph...gret in theory but impracticle in real life.

finally, you will be going through a good amount of propane if this system runs the way it is described...

so

add to the cost of the system the cost of the propane fill with every couple tanks of fuel.

IF

it does what it is claiming (and my understanding is "if it sounds too good to be true, it usually is") then EXCELLENT but to take a NA 3B and add propane and get 30% better return on a tank of fuel is ... well .. hard to beleive.

I hope it works to your expectations.

in the end i only recommend PI for power, not fuel economy savings but i would love to be proven wrong. who wouldn't want to get 40 mpg from their diesel cruiser...

 

[crushers]

oh, a point i do like about the system is the ability for the ECU to shut off the propane when the EGTs reach a preprogramed temp...
nice safe guard.

the fuel economy returns are impressive... $27 per fill savings so after 471 tanks of fuel ($12,719 CND...you did say $13,000 AUD right?) you will break even at the rate for that Rover in the "economy " page:
Economy of Gas Injection

 

[OinkOinker]

well,
if you want me to make a few points then here goes...now remember this is just a critics view....

critic's view or cynic's??

 

[crushers]

either / or

30% better fuel milage is BS