Thread: Custom gas injection??

Been well covered, do a search.

Basically 1/3 more power means combustion temps that are melting your piston crowns.
If you want more power then get a turbo and do it properly. Not half-arsed.

Seriously kid, tell dad to fit a turbo, all other measures are insignificant

OMG
That bloke dosn't deserve that car

This is the exact reason why we have veh rego checks

When I read the first post I did some googling and some quick reading.

the D-gas site claims that for a NA diesel 20% power increase is about normal and 25% for turbo diesels.

Not so sure of the BBQ set up though but it probably would work that easily

Originally Posted by clean32

When I read the first post I did some googling and some quick reading.

the D-gas site claims that for a NA diesel 20% power increase is about normal and 25% for turbo diesels.

Not so sure of the BBQ set up though but it probably would work that easily

Of course there's a pretty clear relationship between power and EGT's. 25% more from most factory diesels is easy to do with just straight diesel (chip or turn the screws), but it means eating the EGT safety margin the factory engineers put there.

Originally Posted by Dougal

Of course there's a pretty clear relationship between power and EGT's. 25% more from most factory diesels is easy to do with just straight diesel (chip or turn the screws), but it means eating the EGT safety margin the factory engineers put there.

In the best of faulty towers Spanish Key??
Dougal we are talking about LPG ( cng works much better) not turning up the screws.

just turning up the screws will take UBF from say 25 % - 30% - 40 % and so on with a corresponding but not lineal change in EGT although this will not directly correspond to CCT.

D-Gas has a different effect with UBF going from 25% - 20% all the way down to about 5% which Obviously will reduce EGT correspondingly lineal. But while initially not greatly affecting CCT it will at about the UBF 15% mark

Originally Posted by clean32

In the best of faulty towers Spanish Key??
Dougal we are talking about LPG ( cng works much better) not turning up the screws.

just turning up the screws will take UBF from say 25 % - 30% - 40 % and so on with a corresponding but not lineal change in EGT although this will not directly correspond to CCT.

D-Gas has a different effect with UBF going from 25% - 20% all the way down to about 5% which Obviously will reduce EGT correspondingly lineal. But while initially not greatly affecting CCT it will at about the UBF 15% mark

What exactly is UBF? I know what CBF stands for. CCT is another mystery as I'm sure closed circuit TV isn't part of the currently discussion.

Extra fuel is extra fuel, there is no magic way to increase power without increasing EGT's. Remember engines are air pumps, the burning fuel heats the air. More heat = more power.

Originally Posted by Dougal

Extra fuel is extra fuel, there is no magic way to increase power without increasing EGT's. .

wrong, EGT is a meassure of a number of infuences. that may also be influenced buy othere factors as well, corosponding and or overlaping sonic pulses, back pressure, UBF unburnt fule Gas state, or UBF burning out of the combustion chamber, thats whay its not directly linked to CCT cumbustion chamber tempature.

Originally Posted by Dougal

Remember engines are air pumps, the burning fuel heats the air. More heat = more power.

Wrong, more temp will add greater excitement to any material within the combustion chamber = more HP BUT there is a point where the expansion rate diminishes with temperature. If we were to look at the basic elements and molecules that are within the combustion chamber then look at how that behave at different temperatures and so on. With a diesel turning up the screws at some point will result in the diesel gassing off in the expansion chamber and not burning ( LOL as much as it would normally) evaporated diesel will add more push than hot co2 or nitrogen.


An example. water turns to steam ( not a gas and not evaporate) diesel will do the same. now if you understand that its is much harder ( constant temp) to compress steam or diesel gas back to a liquid than it is to say compress CO2 into a liquid ( 120psi) then you will have an idea of what pushes the piston down ( and its not Temp)

There are plenty of examples of this, just that they are not automotive. a metro liner once set up for cruse the pilot will turn on the water injection ( it is just water with wood alcohol added so it will not freeze) you can feel the acceleration as soon as the button is pushed. steam being much more dense than co2 ads to the push as well as lowering EGT and actually lowering the volume of gasses.

Less gas more dense is still more power

Another example would be a steam train, they worked but they don’t use diesel trains because they don’t work
Also Nitrogen ( that’s dos most of the work) is about 30 times harder to compress than CO2