mj

...and if so, what gains would there be?

cheers,

mike.

AndyC_772

iTrader: (2)

I guess if you put in enough, it might prevent the fuel from ever igniting at all

greasemonkey

So MJ can expect reductions in cylinder temp leading to improvements in engine working life then?

mj

cryptic answers eh?

has anyone done this then?

BIGALL

just chip it 25% powe more torque and better MPG

mj

can't afford £500 for chipping

Richard Askew

OB@£5 a hit (per tank)

1 tank a week

500 quid for a chip - divide what you'd spend on OB and the chip pays for itself in 100 weeks

Therefore in less than 2 years you get to break-even..

In conclusion the chip is justifiable

I thank yooooo

ALi-B

iTrader: (1)

Someone can correct me on this. But I think you can improve power by heating the fuel to a certain temperature.

I think it has something to do with it being thinner and giving better atomising at the injectors.

Bear in mind diesel can actually freeze (dependant on additives), and the tank is roughly at ambient temp, I'm sure there is something in that theory.

Also mixing LPG in with the air gives better oomph too

AndyC_772

iTrader: (2)

To give a slightly less cryptic explanation of my initial response:

In a petrol engine, greatest thermodynamic efficiency (ie. the engine is able to extract the most useful energy from the fuel) is achieved if the compression ratio is high. However, compressing the mixture too far causes pre-ignition (detonation, or knock) which leads to engine damage. The octane rating of the fuel describes its ability to resist spontaneous ignition under extreme conditions - a high octane fuel will only burn when ignited by a spark, whereas a low octane fuel may start to burn in an uncontrolled way simply due to the heat from compression. Therefore, with a high octane fuel, the engine can operate in a region of higher thermodynamic efficiency and therefore extracts more useful power from the fuel.

In a diesel engine, the compression ratio is much higher, but fuel isn't injected until after the compression stroke. There is no spark plug - the fuel ignites because the compressed air in the cylinder is hot. Effectively it relies on the very thing that octane booster tries to prevent - spontaneous ignition. That's why it won't help in a diesel engine, and (now I think about it), why only one grade of diesel is available at the pump.

Very simplistic I'm sure, but that explanation works for me

A.

pugoetru

dont know about octane booster dought it would work
lpg injection does work well in diesels best on turbos though more power cleaner emissions still £500 for diy kit though

so just chip it